Rohde & Schwarz FSH3, 1145.5850.13, 1145.5850.23, 1145.5850.03 Operating Manual

Test and Measurement
Division

Operating Manual

Handheld Spectrum Analyzer
R&S FSH3

1145.5850.03

1145.5850.13

1145.5850.23

1145.5973.12-06- 1

R&S FSH3 Contents

Contents

Specifications
Safety Instructions
Certificate of Quality
EC-Certificate of Conformity
Support Center Address
List of R&S Representatives

1 Putting into Operation

..............................................................................................................1.1

Front view..........................................................................................................................................1.1

Putting into Operation......................................................................................................................1.2

Unpacking the Instrument...........................................................................................................1.2

Setting up the Instrument............................................................................................................1.3

Switching on the Spectrum Analyzer ..........................................................................................1.4

Spectrum Analyzer Connectors..................................................................................................1.5

Screen Settings...........................................................................................................................1.7

Country-Specific Settings............................................................................................................1.9

Setting the Date and Time........................................................................................................1.10

Setting the date............................................................................................................1.10

Setting the time............................................................................................................1.10

Charging the Battery......................................................................................................................1.11

Switchover External Reference / External Trigger......................................................................1.12

Using a Preamplifier.......................................................................................................................1.13

PIN Code Entry................................................................................................................................1.14

Connecting Printers.......................................................................................................................1.16

Enabling Options............................................................................................................................1.18

1145.5973.12 I.1 E-6

Contents R&S FSH3

2 Getting Started ............................................................................................................................2.1

Measurements on CW Signals........................................................................................................2.1

Level measurement ....................................................................................................................2.1

Setting the Reference Level........................................................................................................2.2

Frequency Measurements..........................................................................................................2.3

Harmonic Measurements............................................................................................................2.4

Power Measurements Using the Power Sensor.........................................................................2.5

Power and Reflection Measurements with the R&S FSH-Z44 ...................................................2.7

Two Port Transmission measurements......................................................................................2.9

Measurement of Return Loss ...................................................................................................2.11

Performing Distance to Fault Measurement.............................................................................2.14

Saving and Recalling Settings and Test Results........................................................................2.20

Saving Measurement Results...................................................................................................2.20

Saving Calibration Data............................................................................................................2.21

Recalling Measurement Results...............................................................................................2.22

Printing Out Measurement Results ..............................................................................................2.23

3 Operation

.......................................................................................................................................3.1

Screen Layout...................................................................................................................................3.1

Screen layout for spectrum-mode measurements without markers...........................................3.1

Screen layout when the marker mode is selected......................................................................3.2

Entering Measurement Parameters................................................................................................3.3

Entering values and texts............................................................................................................3.3

Entering units..............................................................................................................................3.4

Menu Overview.................................................................................................................................3.5

Frequency entry..........................................................................................................................3.5

Frequency span entry.................................................................................................................3.5

Level entry...................................................................................................................................3.5

Bandwidth entry..........................................................................................................................3.5

Sweep entry................................................................................................................................3.6

Trace settings .............................................................................................................................3.6

Measurement functions ..............................................................................................................3.7

Markers.......................................................................................................................................3.8

Save and print menu.................................................................................................................3.10

Instrument setup.......................................................................................................................3.10

Status display............................................................................................................................3.10

1145.5973.12 I.2 E-6

R&S FSH3 Contents

4 Instrument Functions...............................................................................................................4.1

Instrument Default Setup.................................................................................................................4.1

Status Display...................................................................................................................................4.1

Setting the Frequency......................................................................................................................4.2

Entering the center frequency.....................................................................................................4.2

Setting a frequency offset...........................................................................................................4.2

Entering the center-frequency stepsize ......................................................................................4.3

Entering the start and stop frequency.........................................................................................4.4

Setting the Span...............................................................................................................................4.5

Setting the Amplitude Parameters..................................................................................................4.6

Setting the reference level..........................................................................................................4.8

Entering the display range..........................................................................................................4.8

Entering the display unit..............................................................................................................4.9

Entering the reference offset ......................................................................................................4.9

Entering the input impedance .....................................................................................................4.9

Setting the Bandwidths .................................................................................................................4.10

Resolution bandwidth................................................................................................................4.10

Video bandwidth........................................................................................................................4.12

Setting the Sweep...........................................................................................................................4.14

Sweep time...............................................................................................................................4.14

Sweep mode.............................................................................................................................4.15

Trigger.......................................................................................................................................4.16

Trace Settings.................................................................................................................................4.18

Trace mode...............................................................................................................................4.18

Detector ....................................................................................................................................4.20

Trace memory...........................................................................................................................4.21

Using the Markers ..........................................................................................................................4.22

Automatic marker positioning ...................................................................................................4.23

Using more than one marker at a time (multimarker mode).....................................................4.24

Marker functions .......................................................................................................................4.29

Measuring the noise power density..............................................................................4.29

Measuring the frequency..............................................................................................4.30

AF demodulation.......................................................................................................................4.31

Using the Display Line...................................................................................................................4.32

1145.5973.12 I.3 E-6

Contents R&S FSH3

1145.5973.12 I.4 E-6

Setting and Using the Measurement Functions..........................................................................4.33

Measuring the channel power of continuously modulated signals............................................4.33

Power measurements on TDMA signals ..................................................................................4.36

Measuring the occupied bandwidth ..........................................................................................4.40

Measurements using the power sensor....................................................................................4.43

Connecting the power sensor ......................................................................................4.43

Zeroing the power sensor ............................................................................................4.46

Selecting the unit for the power readout ......................................................................4.46

Setting the averaging time ...........................................................................................4.47

Taking additional loss or gain into account..................................................................4.48

Measuring forward and reflected power with the Directional Power Sensor R&S FSH-Z44.....4.48

Zeroing the power sensor ............................................................................................4.50

Selecting the unit for the power readout ......................................................................4.51

Taking additional attenuation into account...................................................................4.53

Two-port measurements with the tracking generator ...............................................................4.53

Measuring the transfer function of two-ports................................................................4.56

Vector measurement of transfer function.....................................................4.58

Reflection measurements............................................................................................4.60

Scalar measurement of reflection.................................................................4.60

Vector measurement of reflection ................................................................4.63

Cable Measurements................................................................................................................4.65

Using Limit Lines............................................................................................................................4.78

Measuring with Transducer Factors.............................................................................................4.82

Saving and Loading Instrument Settings and Measurement Results.......................................4.85

Saving results ...........................................................................................................................4.85

Entering a data set name.............................................................................................4.86

Loading measurement results ..................................................................................................4.87

Deleting saved data sets................................................................................................................4.88

Deleting all data sets.................................................................................................................4.88

Printing out Measurement Results...............................................................................................4.89

Measurements ................................................................................................................................4.90

How a spectrum analyzer operates ..........................................................................................4.90

R&S FSH3 Specifications

Specifications

Specifications apply under the following conditions: 15 minutes warm-up time at ambient temperature,
specified environmental conditions met and calibration cycle adhered to. Data without tolerances:
typical values only. Data designated as "nominal" are design parameters and are not tested.

Frequency

Frequency range 100 kHz to 3 GHz

Reference frequency

Aging 2 ppm/year

Temperature drift 2 ppm ( 0 °C to 30 °C),

plus 2 ppm/10 °C from 30 °C to 50 °C

Frequency counter

Resolution 1 Hz

Frequency span 10 kHz to 3 GHz, 0 Hz

Spectral purity

SSB phase noise, f = 500 MHz, 20 °C to 30 °C

30 kHz from carrier < 85 dBc (1 Hz)

100 kHz from carrier < 100 dBc (1 Hz)

1 MHz from carrier < 120 dBc (1 Hz)

Sweep time

Span ≥ 10 kHz

20 ms to 1000 s

Span = 0 Hz 1 ms to 100 s

Bandwidths

Resolution bandwidths (-3 dB)

With model 1145.5850.23 in addition

1 kHz to 1 MHz in 1, 3 steps, 200 kHz

100 Hz, 300 Hz

Tolerance

± 5 %, nominal

Video bandwidths 10 Hz to 1 MHz in 1, 3 steps

Amplitude

Display range average noise level displayed to +20 dBm

Maximum permissible DC voltage at
RF input (does not correspond to test voltage)

50 V/80 V

1

)

Maximum power 20 dBm, 30 dBm (1 W) for max. 3 minutes

Intermodulation-free dynamic range

2 x -20 dBm, reference level = -10 dBm
(0 dB RF attenuation)

70 dB (+15 dBm 2nd-order intercept)

Displayed average noise level,
resolution bandwidth 1 kHz,
video bandwidth 10 Hz, 10 MHz to 3 GHz,
reference level ≤ -30 dBm
with preamplifier (only model 1145.5850.23)
10 MHz to 2.5 GHz

2.5 GHz to 3 GHz

<–105 dBm, typ. –114 dBm

<–120 dBm, typ. –125 dBm
<–115 dBm, typ. –120 dBm

Inherent spurious
Reference level ≤ -10 dBm, f > 30 MHz,
RBW ≤100 kHz

<-80 dBm

1

80 V valid as of serial number 100900 (model 1145.5850.03) and 101600 (model 1145.5850.13); model 1145.5850.23: all serial numbers

1145.5973.12 TI.1 E-6

Specifications R&S FSH3

Input related spurious
Carrier offset > 1 MHz

<-70 dBc (nominal)

Level display

Reference level -80 dBm to +20 dBm in steps of 1 dB

Display range 100 dB, 50 dB, 20 dB, 10 dB, linear

Display units

Logarithmic

Linear

dBm, dBµV, dBmV,
with transducer also dBµV/m and dBµA/m

µV, mV, V, nW, µW, mW, W,
with transducer also V/m, mV/m and µV/m

Traces 1 trace and 1 memory trace

Detectors auto peak, maximum peak, minimum peak, sample, rms

Level measurement error,
frequency >1 MHz,

at reference level down to 50 dB

<1.5 dB (20 °C to 30 °C)

Markers

Number of markers or delta markers max. 6 total

Marker functions peak, next peak, minimum, center = marker frequency,

reference level = marker level, all markers to peak

Marker displays normal (level), noise marker, frequency counter (count)

Trigger

free run, video, external

Audio demodulation

AM (video voltage without AGC) and FM

Inputs

RF input N female

Input impedance

50 Ω

VSWR (10 MHz to 3 GHz) typ. 1.5

Trigger/external reference input BNC female, selectable

Trigger voltage TTL

Reference frequency 10 MHz

Required level from 50 Ω

10 dBm

Outputs

AF output 3.5 mm mini jack

Output impedance
Open-circuit voltage

100 Ω
adjustable up to 1.5 V

Tracking generator
(only models 1145.5850.13 and 1145.5850.23)

N female

Frequency range 5 MHz to 3 GHz

Output level model 1145.5850.13

model 1145.5850.23

-20 dBm (nominal)

0 dBm/-20 dBm, selectable

Output impedance

50 Ω, nominal

Interfaces

RS-232-C optical interface

Baud rate 1200, 2400, 9600, 19200, 38400, 57600, 115200 baud

Power sensor 7-contact female (type Binder 712)

1145.5973.12 TI.2 E-6

R&S FSH3 Specifications

Accessories

Power Sensors R&S FSH-Z1 and R&S FSH-Z18

Frequency range R&S FSH-Z1

R&S FSH-Z18

10 MHz to 8 GHz

10 MHz to 18 GHz

VSWR
10 MHz to 30 MHz
20 MHz to 2.4 GHz

2.4 GHz to 8 GHz
8 GHz to 18 GHz

<1.15
<1.13
<1.20
<1.25

Maximum input power 400 mW (+26 dBm), average power

1 W (+30 dBm), peak power (<10 µs, 1 % duty cycle)

Measurement range 200 pW to 200 mW (-67 dBm to +23 dBm)

Signal weighting
Effect of harmonics
Effect of modulation

average power

<0.5 % (0.02 dB) at harmonic ratio of 20 dBc
<1.5 % (0.07 dB) for continuous digital modulation

Absolute measurement uncertainty
(sine signals, no zero offset)

10 MHz to 8 GHz 15 °C to 35 °C
0 °C to 50 °C

8 GHz to 18 GHz 15 °C to 35 °C
0 °C to 50 °C

<2.5 % (0.11 dB)
<4.5 % (0.19 dB)

<3.5 % (0.15 dB)
<5.2 % (0.22 dB)

Zero offset after zeroing < 150 pW

Dimensions 48 mm x 31 mm x 170 mm, connecting cable 1.5 m

Weight < 0.3 kg

Directional Power Sensor R&S FSH-Z44

Frequency range 200 MHz to 4 GHz

Power measurement range 30 mW to 120 W (300 W with unmodulated envelope)

VSWR referenced to 50 Ω
200 MHz to 3 GHz
3 GHz to 4 GHz

< 1.07
< 1.12

Power-handling capacity 120 W to 1000 W, depending on temperature and matching

(see diagram below)

Insertion loss 200 MHz to 1.5 GHz

1.5 GHz to 4 GHz

< 0.06 dB
< 0.09 dB

Directivity 200 MHz to 3 GHz
3 GHz to 4 GHz

> 30 dB
> 26 dB

Signal weighting average power

Measurement uncertainty
(sine signals, 18 °C to 28 °C, no zero offset)
200 MHz to 300 MHz
300 MHz to 4 GHz

4 % of measured value (0.17 dB)

3.2 % of measured value (0.14 dB)

Zero offset after zeroing

± 4 mW

Range of typical measurement error with modulation

FM, PM, FSK, GMSK
AM (80 %)
cdmaOne, DAB
3GPP W-CDMA, cdma2000
DVB-T
π/4 DQPSK

0 % of measured value (0 dB)

± 3 % of measured value (± 0.13 dB)
± 1 % of measured value (± 0.04 dB)
± 2 % of measured value (± 0.09 dB)
± 2 % of measured value (± 0.09 dB)
± 2 % of measured value (± 0.09 dB)

If standard is selected
on R&S FSH3

Temperature coefficient 200 MHz to 300 MHz
300 MHz to 4 GHz

0.40 %/K (0.017 dB/K)

0.25 %/K (0.011 dB/K)

1145.5973.12 TI.3 E-6

Specifications R&S FSH3

Matching measurement range
Return loss 200 MHz to 3 GHz
3 GHz to 4 GHz
VSWR 200 MHz to 3 GHz
3 GHz to 4 GHz

0 dB to 23 dB
0 dB to 20 dB
> 1.15
> 1.22

Minimum forward power 0.03 W, specs met from at 0.2 W

Limits of measurement error for matching
measurements

dB

0510

15

20

25

Return loss

0.2 to 3 GHz

-4

-2

0

2

4

6

Measurement error

dB

Power-handling capacity

Dimensions 120 mm x 95 mm x 39 mm, connecting cable 1.5 m

Weight 0.65 kg

VSWR Bridge and Power Divider R&S FSH-Z2

Frequency range 10 MHz to 3 GHz

Impedance

50 Ω

VSWR bridge

Directivity 10 MHz to 1 GHz
1 GHz to 3 GHz
Directivity, corrected (option R&S FSH-K2)
10 MHz to 3 GHz

30 dB
25 dB

43 dB

Return loss at test port

Return loss, corrected
(option R&S FSH-K2)

20 dB

35 dB

Insertion loss 9 dB

Power divider

Return loss at test port 20 dB

Connectors

Generator input/RF output N male

Test port N female

Control interface 7-contact connector (type Binder)

3 to 4 GHz

AVG -10 °C...35 °C

SWR < 3

AVG 35 °C...50 °C

SWR < 3

PEAK (max 10 ms), SWR < 3

AVG -10 °C...35 °C

SWR < 1.5

Forward po wer

Frequency

0,2

0,4

0,7

1

23

4 GHz

100

200

400

600

800

1000

1145.5973.12 TI.4 E-6

R&S FSH3 Specifications

Calibration standards

Short/open

Connector N male

50 Ω load

Impedance

50 Ω

Return loss up to 3 GHz >46 dB

Power-handling capacity 1 W

Connector N male

General data

Power consumption 500 mW (nominal)

Dimensions (W x H x D) 169 mm x 116 mm x 30 mm

Weight 485 g

Distance-to-fault measurements (option R&S FSH-B1, only model 1145.5850.13 or 1145.5850.23)

Display 301 pixels

Maximum resolution, distance to fault cable length/1023 pixels (maximum zoom)

Display range

Return loss
VSWR

10, 5, 2, 1 dB/div, linear
1-2 and 1-6,
with option R&S FSH-K2 also 1-1.2 and 1-1.5

Cable length 3 m to 1000 m max.

(depending on cable attenuation)

Maximum permissible spurious signal 1st mixer 1 dB compression point +10 dBm typ.

IF overload at reference level +8 dB typ.

Transmission measurements (only model 1145.5850.13 or 1145.5850.23)

Frequency range 10 MHz to 3 GHz

Dynamic range

10 MHz to 2.2 GHz

2.2 GHz to 3 GHz

60 dB (scalar measurements)

80 dB (vector measurements, option R&S FSH-K2)

50 dB (scalar measurements)

65 dB (vector measurements, option R&S FSH-K2)

Reflection measurements (only model 1145.5850.13 or 1145.5850.23 with R&S FSH-Z2)

Frequency range 10 MHz to 3 GHz

Display range of return loss 10 dB, 20 dB, 50 dB, 100 dB, selectable

VSWR display range 1-2 and 1-6, selectable,

with option R&S FSH-K2 also 1-1.2 and 1-1.5

Measurement uncertainty see diagram

1145.5973.12 TI.5 E-6

Specifications R&S FSH3

-3

-2

-1

0

1

2

3

0 2 4 6 81012141618

20

Return loss DUT / dB

Measurement

uncertai nty / dB

Measurement uncertainty with scalar measurements

-3

-2

-1

0

1

2

3

0510

15

20

25 30

Return loss DUT / dB

Measurement

uncerta inty / dB

Measurement uncertainty with vector measurements

(option R&S FSH-K2)

General data

Display

14 cm (5.7") LC colour display

Resolution 320 x 240 pixels

Memory

Settings and traces

CMOS RAM
100

Environmental conditions
Temperature

Operating temperature range
R&S FSH3 powered from internal battery
R&S FSH3 powered from AC power
supply

0 °C to 50 °C
0 °C to 40 °C

Storage temperature range -20 °C to +60 °C
Battery charging mode 0 °C to 40 °C

Climatic conditions

Relative humidity 95 % at 40 °C (EN 60068)

IP class of protection

51

Mechanical resistance

Vibration, sinusoidal complies with EN 60068-2-1, EN 61010-1

5 Hz to 55 Hz: max 2 g, 55 Hz to 150 Hz: 0.5 g constant,
12 minutes per axis

Vibration, random complies with EN 60068-2-64

10 Hz to 500 Hz, 1.9 g rms, 30 minutes per axis

Shock complies with EN 60068-2-27

40 g shock spectrum

RFI suppression

complies with EMC directive of EU (89/336/EEC)
and German EMC legislation

Immunity to radiated interference

Level display for 10 V/m (ref. level ≤-10 dBm)
Input frequency
IF
Other frequencies

10 V/m

<-75 dBm (nominal)
<-85 dBm (nominal)
< displayed noise level

Power supply

AC supply plug-in AC power supply (R&S FSH-Z33)

100 V AC to 240 V AC, 50 Hz to 60 Hz, 400 mA

External DC voltage 15 V to 20 V

1145.5973.12 TI.6 E-6

R&S FSH3 Specifications

1145.5973.12 TI.7 E-6

Internal battery NiMH battery, type Fluke BP190 (R&S FSH-Z32)

Battery voltage 6 V to 9 V
Operating time with fully-charged battery 4 h with tracking generator off,

3.5 h with tracking generator on
Battery charging time 4 h with instrument off
Lifetime 300 to 500 charging cycles

Power consumption 7 W (typ.)

Safety

complies with EN 61010-1, UL 3111-1,
CSA C22.2 No. 1010-1

Test mark VDE, GS, CSA, CSA-NRTL

Dimensions (W x H x D)

170 mm x 120 mm x 270 mm

Weight

2.5 kg

Ordering information

Handheld Spectrum Analyzer R&S FSH3
100 kHz to 3 GHz

1145.5850.03

Handheld Spectrum Analyzer R&S FSH3
with tracking generator, 100 kHz to 3 GHz

1145.5850.13

Handheld Spectrum Analyzer R&S FSH3
100 kHz to 3 GHz, with tracking generator and
preamplifier

1145.5850.23

Accessories supplied

external power supply
battery pack (built-in)
RS-232-C optical cable
headphones
Quick Start manual
CD-ROM with Control Software R&S FSH View and
documentation

Options

Designation Order No.

Distance-to-Fault Measurements for R&S FSH3
(includes 1 m cable, R&S FSH-Z2 required)

R&S FSH-B1 1145.5750.02

Remote Control via RS-232-C for R&S FSH3 R&S FSH-K1 1157.3458.02

Vector Transmission and Reflection Measurements
for R&S FSH3

R&S FSH-K2 1157.3387.02

Optional accessories

Designation Order No.

Power Sensor, 10 MHz to 8 GHz, for Spectrum
Analyzer R&S FSH3

R&S FSH-Z1 1155.4505.02

VSWR Bridge and Power Divider,
10 MHz to 3 GHz, for R&S FSH3
(open, short, 50 Ω load)

R&S FSH-Z2 1145.5767.02

Power Sensor, 10 MHz to 18 GHz, for R&S FSH3 R&S FSH-Z18 1165.1909.02

Directional Power Sensor, 200 MHz to 4 GHz,
for R&S FSH3

R&S FSH-Z44 1165.2305.02

50/75 Ω Matching Pad, 0 MHz to 2700 MHz R&S RAZ 0358.5714.02

Spare RF Cable (1 m), connectors N male/N
female for R&S FSH-B1

R&S FSH-Z20 1145.5867.02

Specifications R&S FSH3

1145.5973.12 TI.8 E-6

12 V Car Adapter for R&S FSH3 R&S FSH-Z21 1145.5873.02

Serial/Parallel Converter for R&S FSH3 R&S FSH-Z22 1145.5880.02

Carrying Bag for R&S FSH3 R&S FSH-Z25 1145.5896.02

Spare Short/Open Standard for R&S FSH-Z2 for
VSWR Calibration

R&S FSH-Z30 1145.5773.02

Spare 50 Ω Load Standard for R&S FSH-Z2 for
VSWR and DTF Calibration

R&S FSH-Z31 1145.5780.02

Spare Battery Pack for R&S FSH3 R&S FSH-Z32 1145.5796.02

Spare AC Power Supply for R&S FSH3 R&S FSH-Z33 1145.5809.02

Spare RS-232-C Optical Cable R&S FSH-Z34 1145.5815.02

Spare CD-ROM with Control Software R&S FSH
View and documentation

R&S FSH-Z35 1145.5821.02

Spare Headphones R&S FSH-Z36 1145.5838.02

Safety Instructions

This unit has been designed and tested in accordance with the EC Certificate of Conformity and has left the
manufacturer’s plant in a condition fully complying with safety standards.

To maintain this condition and to ensure safe operation, the user must observe all instructions and warnings
given in this operating manual.

Safety-related symbols used on equipment and documentation from R&S:

Observe op-

erating in-

structions

Weight

indication for

units >18 kg

PE terminal Ground

terminal

Danger!

Shock hazard

Warning!

Hot surfaces

Ground

Attention!
Electrostatic
sensitive de­vices require

special care

6. Applicable local or national safety regulations
and rules for the prevention of accidents must
be observed in all work performed.

1. The unit may be used only in the operating con­ditions and positions specified by the manufac­turer. The R&S FSH3 is protected against drip­ping water and dust (IP degree 51).

Prior to performing any work on the unit or open-

ing the unit, the latter must be disconnected
from the supply network.

Unless otherwise agreed, the f ollowing applies:

pollution severity 2, overvoltage category 2, alti­tude max. 2000 m.

Any adjustments, replacements of parts, main-

tenance or repair may be carried out only by au­thorized R&S technical personnel.

The unit may be operated only from supply net-

works fused with max. 16 A.

Only original parts may be used for replacing

parts relevant to safety (eg power switches,
power transformers, fuses). A safety test must
be performed after each replacement of parts
relevant to safety.

Unless specified otherwis e in the data sheet, a

tolerance of ±10% shall apply to the nominal
voltage and of ±5% to the nominal frequency.

2. For measurements in circuits with voltages V

rms

> 30 V, suitable measures should be taken to
avoid any hazards.

(visual inspection, PE conductor test, insulation-

resistance, leakage-current measurement, func­tional test).

(using, for example, appropriate measuring

equipment, fusing, current limiting, electrical
separation, insulation).

7. Ensure that the connections with information
technology equipment comply with IEC950 /
EN60950.

3. For permanently installed units without built-in
fuses, circuit breakers or similar protective de­vices, the supply circuit must be fused such as
to provide suitable protection for the users and
equipment.

8. NiMH batteries must not be exposed to high
temperatures or fire.

Keep batteries away from children.
If the battery is replaced improperly, there is

danger of explosion. Only replace the battery by
R&S type (see spare part list).

4. Prior to switching on the unit, it must be ensured
that the nominal voltage set on the unit matches
the nominal voltage of the AC supply network.

NiMH batteries are suitable for environmentally-

friendly disposal or specialized recycling. Dis­pose them into appropriate containers, only.

If a diff erent voltage is to be set, the power fuse

of the unit may have to be changed accordingly.

5. If the unit has no power switch for disconnection
from the AC supply, the plug of the connecting
cable is regarded as the disconnecting device.
In such cases it must be ensured that the power
plug is easily reachable and accessible at all
times (length of connecting cable approx. 2 m).
Functional or electronic switches are not suit­able for providing disconnection from the AC
supply.

Do not short-circuit the battery.

9. Equipment returned or sent in for repair must be
packed in the original packing or in packing with
electrostatic and mechanical protection.

10.

Electrostatics via the c onnectors m ay damage
the equipment. For the saf e handling and op­eration of the equipment, appropriate meas­ures against electrostatics should be imple­mented.

If units without power switches are integrated in

racks or systems, a disconnecting device must
be provided at system level.

Safety Instructions

11. The outside of the instrument is suitably
cleaned using a soft, lint-free dustcloth. Never
use solvents such as thinners, acetone and
similar things, as they may damage the f ront
panel labeling or plastic parts.

12. Any additional safety instructions given in this
manual are also to be observed.

R&S FSH3 Certificate of quality

Certificate of quality

Dear Customer,
You have decided to buy a Rohde & Schwarz product.
You are thus assured of receiving a product that is manufactured using the most modern methods
available. This product was developed, manufactured and tested in compliance with our quality
management system standards. The Rohde & Schwarz quality management system is certified
according to ISO 9001.

Certified Quality System
ISO 9001
DQS REG. NO 1954-04

EC Certificate of Conformity

Certificate No.: 2002-41

This is to certify that:

Equipment type

Stock No. Designation
FSH3 1145.5850.03/.13/.23 Handheld Spectrum Analyzer
FSH-Z1 1155.4505.02 Average Power Sensor

FSH-Z18 1165. 1909. 02 Average Power Sensor
FSH-Z2 1145.5767.02 VSWR Bridge and Power Driver
FSH-Z32 1145. 5796.02 Spare Batterie Pack
FSH-Z33 1145. 5809. 02 Spare Power Supply
FSH-Z44 1165. 2305. 02 Directional Power Sensor

complies with the provisions of the Directive of the Council of the European Union on the
approximation of the laws of the Member States

- relat ing to electrical equipment for use within defined voltage limits
(73/23/EEC revised by 93/68/EEC)

- relating to electromagnetic compatibility
(89/336/EEC revised by 91/263/EEC, 92/31/EEC, 93/68/EEC)

Conformity is proven by compliance with the following standards:
EN61010-1 : 1993 + A2 : 1995

EN55011 : 1998 + A1 : 1999, Klasse B
EN61326 : 1997 + A1 : 1998 + A2 : 2001

For the assessment of electromagnetic compatibility, the limits of radio interference for Class
B equipment as well as the immunity to interference for operation in industry have been used
as a basis.

Affixing the EC conformity mark as from 2002

ROHDE & SCHWARZ GmbH & Co. KG
Mühldorfstr. 15, D-81671 München

Munich, 2003-09-03 Central Quality Management FS-QZ / Becker

1145.5850.01 CE E-5

R&S FSH3 Support Center

Support Center

Should you have a n y tec h n ic al qu es tio ns c onc ern in g t his R ohd e & Schwarz pr od uc t, p lease c ont ac t t he
hotline of Rohde & Schwarz Vertriebs-GmbH, Support Center.

Our hotline team will answer your questions and find solutions to your problems.
You can reach the hotline Monday through Friday from 8:00 until 17:00.
If you need assistance outs ide of fice hour s, p lease lea ve a m essage or send us a fax or e-m ail. W e will

contact you as soon as possible.

If you wish to receive the l atest news about and updates for a s pecific instrum ent, please send
us a short e-ma il indicating the instrum ent. We will then send you up-to-date inform ation on a
regular basis.

Support Center
Telefon / Telephone: [phone]
Fax: [phone] - 137 77
e-mail: [e-mail]

Adressen/Addresses

FIRMENSITZ/HEADQUARTERS

Phone

Fax

E-mail

Rohde & Schwarz GmbH & Co. KG
Mühldorfstraße 15 · D-81671 München
Postfach 80 14 69 · D-81614 München

[phone]

[phone]

-

WERKE/PLANTS

Rohde & Schwarz Messgerätebau GmbH
Riedbachstraße 58 · D-87700 Memmingen
Postfach 1652 · D-87686 Memmingen

[phone]

[phone]

-

Rohde & Schwarz GmbH & Co. KG
Werk Teisnach
Kaikenrieder Straße 27 · D-94244 Teisnach
Postfach 1149 · D-94240 Teisnach

[phone]

[phone]

-

Rohde & Schwarz GmbH & Co. KG
Dienstleistungszentrum Köln
Graf-Zeppelin-Straße 18 · D-51147 Köln
Postfach 98 02 60 · D-51130 Köln

[phone]

[phone]

[e-mail]

[e-mail]

TOCHTERUNTERNEHMEN/SUBSIDIARIES

Rohde & Schwarz Vertriebs-GmbH
Mühldorfstraße 15 · D-81671 München
Postfach 80 14 69 · D-81614 München

[phone]
[phone]

-

Rohde & Schwarz International GmbH
Mühldorfstraße 15 · D-81671 München
Postfach 80 14 60 · D-81614 München

[phone]
[phone]

-

Rohde & Schwarz Engineering and Sales
GmbH
Mühldorfstraße 15 · D-81671 München
Postfach 80 14 29 · D-81614 München

[phone]
[phone]

-

R&S BICK Mobilfunk GmbH
Fritz-Hahne-Str. 7 · D-31848 Bad Münder
Postfach 2062 · D-31844 Bad Münder

[phone]

[phone]

-

Rohde & Schwarz FTK GmbH
Wendenschlossstraße 168, Haus 28
D-12557 Berlin

[phone]
[phone]

-

Rohde & Schwarz SIT GmbH
Agastraße 3
D-12489 Berlin

[phone]

[phone]

ADRESSEN DEUTSCHLAND/ADDRESSES GERMANY

Rohde & Schwarz Vertriebs-GmbH
Mühldorfstraße 15 · D-81671 München
Postfach 80 14 69 · D-81614 München

[phone]

[phone]

-

Zweigniederlassungen der Rohde &
Schwarz Vertriebs-GmbH/Branch offices of
Rohde & Schwarz Vertriebs-GmbH

Zweigniederlassung Nord, Geschäftsstelle
Berlin
Ernst-Reuter-Platz 10 · D-10587 Berlin
Postfach 100620 · D-10566 Berlin

[phone]

[phone]

-

Zweigniederlassung Büro Bonn
Josef-Wirmer-Straße 1-3 · D-53123 Bonn
Postfach 140264 · D-53057 Bonn

[phone]

[phone]

-

Zweigniederlassung Nord, Geschäftsstelle
Hamburg
Steilshooper Alle 47 · D-22309 Hamburg
Postfach 60 22 40 · D-22232 Hamburg

[phone]

[phone]

-

Zweigniederlassung Mitte, Geschäftsstelle
Köln
Niederkasseler Straße 33 · D-51147 Köln
Postfach 900 149 · D-51111 Köln

[phone]

[phone]

-

Zweigniederlassung Süd, Geschäftsstelle
München
Mühldorfstraße 15 · D-81671 München
Postfach 80 14 69 · D-81614 München

[phone]

[phone]

-

Zweigniederlassung Süd, Geschäftsstelle
Nürnberg
Donaustraße 36
D-90451 Nürnberg

[phone]

[phone]

-

Zweigniederlassung Mitte, Geschäftsstelle
Neu-Isenburg
Siemensstraße 20
D-63263 Neu-Isenburg

[phone]

[phone]

-

ADRESSEN WELTWEIT/ADDRESSES WORLDWIDE

siehe / see AustriaAlbania

ROHDE & SCHWARZ
Bureau d'Alger
5B Place de Laperrine
16035 Hydra-Alger

[phone]
[phone]

Algeria

PRECISION ELECTRONICA S.R.L.
Av. Pde Julio A. Roca 710 - 6° Piso
(C1067ABP) Buenos Aires

[phone]
[phone]

[e-mail]

Argentina

ROHDE & SCHWARZ (AUSTRALIA) Pty. Ltd.
Sales Support
Unit 6
2-8 South Street
Rydalmere, N.S.W. 2116

[phone]
[phone]

[e-mail]-

schwarz.com

Australia

ROHDE & SCHWARZ-ÖSTERREICH
Ges.m.b.H.

Sonnleithnergasse 20
1100 Wien

[phone]

[phone]

[e-mail]

Austria

ROHDE & SCHWARZ Azerbaijan
Liaison Office Baku
ISR Plaza
340 Nizami Str.
370000 Baku

[phone]
[phone]

[e-mail]-

Schwarz.com

Azerbaijan

siehe / see DenmarkBaltic

Countries

BIL Consortium Ltd.
Corporation Office
House No: 95/A, Block - 'F'
Road No. 4, Banani
Dhaka-1213

[phone]
[phone]

Bangladesh

ROHDE & SCHWARZ BELGIUM N.V.
Excelsiorlaan 31 Bus 1
1930 Zaventem

[phone]
[phone]

[e-mail]

Belgium

ROHDE & SCHWARZ DO BRASIL LTDA.
Av. Alfredo Egidio de Souza Aranha n° 177,
1° andar - Santo Amaro
04726-170 Sao Paulo - SP

[phone] (general)

[phone] (sales)

[phone]

[e-mail]-

schwarz.com

Brasil

GKL Equipment PTE. Ltd.
Jurong Point Post Office
P.O.Box 141
Singapore 916405

[phone]
[phone]

[e-mail]

Brunei

ROHDE & SCHWARZ ÖSTERREICH
Representation Office Bulgaria
39, Fridtjof Nansen Blvd.
1000 Sofia

[phone]
[phone]

[e-mail]

Bulgaria

siehe / see SloveniaBosnia-

Herzegovina

Adressen/Addresses

ROHDE & SCHWARZ CANADA Inc.
555 March Rd.
Kanata, Ontario K2K 2M5

[phone]
[phone]

[e-mail]

Canada

TEKTRONIX CANADA Inc.
Test and Measurement
4929 Place Olivia
Saint-Laurent, Pq

Montreal H4R 2V6

[phone]
[phone]

Canada

DYMEQ Ltda.
Av. Larrain 6666
Santiago

[phone]
[phone]

[e-mail]

Chile

ROHDE & SCHWARZ China Ltd.
Representative Office Shanghai
Central Plaza
227 Huangpi North Road
RM 807/809
Shanghai 200003

[phone]
[phone]

China

ROHDE & SCHWARZ China Ltd.
Representative Office Beijing
Room 602, Parkview Center
2 Jiangtai Road
Chao Yang District
Beijing 100016

[phone]
[phone]

[e-mail]-

schwarz.com

China

ROHDE & SCHWARZ China Ltd.
Representative Office Guangzhou
Room 2903, Metro Plaza
183 Tianhe North Road
Guangzhou 510075

[phone]
[phone]

China

ROHDE & SCHWARZ China Ltd.
Representative Office Chengdu
Unit G, 28/F, First City Plaza
308 Shuncheng Avenue
Chengdu 610017

[phone] to 09

[phone]

[e-mail]

China

ROHDE & SCHWARZ China Ltd.
Unit 3115
31/F Entertainment Building
30 Queen's Road Central
Hongkong

[phone]
[phone]

China

ROHDE & SCHWARZ China Ltd.
Representative Office Xi'an
Room 10125, Jianguo Hotel Xi'an
No. 2, Huzhu Road
Xi'an 710048

[phone]
[phone]

[e-mail]

China

Shanghai ROHDE & SCHWARZ
Communication Technology Co.Ltd.
Central Plaza, Unit 809
227 Huangpi North Road
Shanghai 200003

China

Beijing ROHDE & SCHWARZ Communication
Technology Co.Ltd.
Room 106, Parkview Centre
No. 2, Jiangtai Road
Chao Yang District
Beijing 100016

[phone]
[phone]

China

siehe / see SloveniaCroatia

HINIS TELECAST LTD.
Agiou Thoma 18
Kiti

Larnaca 7550

[phone]
[phone]

[e-mail]

Cyprus

ROHDE & SCHWARZ - Praha s.r.o.
Hadovka Office Park
Evropská 33c
16000 Praha 6

[phone]
[phone]

[e-mail]

Czech Republic

ROHDE & SCHWARZ DANMARK A/S
Ejby Industrivej 40
2600 Glostrup

[phone]
[phone]

Denmark

REPRESENTACIONES MANFRED
WEINZIERL
Vía Láctea No. 4 y Via Sta. Inés
P.O.Box 17-22-20309
1722 Cumbayá-Quito

[phone]
[phone]

[e-mail]

Ecuador

U.A.S. Universal Advanced Systems
31 Manshiet El-Bakry Street
Heliopolis
11341 Cairo

[phone]
[phone]

[e-mail]

Egypt

siehe / see Mexico

El Salvador

ROHDE & SCHWARZ DANMARK A/S
Estonian Branch Office
Narva mnt. 13
10151 Tallinn

[phone]
[phone]

[e-mail]-

schwarz.com

Estonia

Orbis Oy
P.O.Box 15
00421 Helsinski 42

[phone]
[phone]

[e-mail]

Finland

ROHDE & SCHWARZ FRANCE
Immeuble "Le Newton"
9-11, rue Jeanne Braconnier
92366 Meudon La Forêt Cédex

[phone]
[phone]

France

Niederlassung/Subsidiary Rennes
37 Rue du Bignon
Bât. A
F-35510 Cesson Sevigne

[phone]
[phone]

-

France

Niederlassung/Subsidiary Toulouse
Technoparc 3
B.P. 501
F-31674 Labège Cédex

[phone]
[phone]

-

France

Aix-en-Provence [phone]

[phone]

-

France

Office Lyon [phone]

[phone]

France

Office Nancy [phone]

[phone]

France

KOP Engineering Ltd.
P.O. Box 11012
3rd Floor Akai House, Osu
Accra North

[phone]

[phone]

Ghana

MERCURY S.A.
6, Loukianou Str.
10675 Athens

[phone]
[phone]

[e-mail]

Greece

siehe / see Mexico Guatemala

siehe / see Mexico Honduras

Electronic Scientific Engineering
36/F Dorset House, Taikoo Place
979 King's Road
Quarry Bay
Hong Kong

[phone]
[phone]

[e-mail]

Hongkong

ROHDE & SCHWARZ
Budapesti Iroda
Váci út 169
1138 Budapest

[phone]
[phone]

[e-mail]

Hungary

siehe / see DenmarkIceland

Adressen/Addresses

ROHDE & SCHWARZ India Pvt. Ltd.
Bangalore Office
No. 24, Service Road, Domlur
2nd Stage Extension
Bangalore - 560 071

[phone]
[phone]

[e-mail]

India

ROHDE & SCHWARZ India Pvt. Ltd.
Hyderabad Office
302 & 303, Millenium Centre
6-3-1099/1100, Somajiguda

Hyderabad - 500 016

[phone]
[phone]

[e-mail]

India

ROHDE & SCHWARZ India Pvt. Ltd.
244, Okhla Industrial Estate, Phase-III
New Delhi 110020

[phone]
[phone]

[e-mail]-schwarz

[e-mail]

India

ROHDE & SCHWARZ India Pvt. Ltd.
RS India Mumbai Office
B-603, Remi Bizcourt, Shah Industrial
Estate, Off Veera Desai Road
Mumbai - 400 058

[phone]
[phone]

[e-mail]

India

PT ROHDE & SCHWARZ Indonesia

Graha Paramita 5th Floor
Jln. Denpasar Raya Blok D-2

Jakarta 12940

[phone]
[phone]

[e-mail]

[e-mail]

Indonesia

ROHDE & SCHWARZ IRAN

Groundfloor No. 1, 14th Street
Khaled Eslamboli (Vozara) Ave.
15117 Tehran

[phone]
[phone]

[e-mail]

Iran

siehe / see United KingdomIreland

EASTRONICS LTD.
Messtechnik / T&M Equipment
11 Rozanis St.
P.O.Box 39300
Tel Aviv 61392

[phone]
[phone]

[e-mail]

Israel

J.M. Moss (Engineering) Ltd.
Kommunikationstechnik/ Communications
Equipment
9 Oded Street
P.O.Box 967
52109 Ramat Gan

[phone]
[phone]

[e-mail]

Israel

ROHDE & SCHWARZ ITALIA S.p.a.
Centro Direzionale Lombardo
Via Roma 108
20060 Cassina de Pecchi (MI)

[phone]
[phone]

[e-mail]-

schwarz.com

Italy

ROHDE & SCHWARZ ITALIA S.p.a.
Via Tiburtina 1182
00156 Roma

[phone]
[phone]

Italy

ADVANTEST Corporation
RS Sales Department
1-32-1, Asahi-cho
Nerima-ku
Tokyo 179-0071

[phone]
[phone]

[e-mail]

Japan

Jordan Crown Engineering & Trading Co.

Jabal Amman, Second Circle
Youssef Ezzideen Street
P.O.Box 830414
Amman, 11183

[phone]
[phone]

[e-mail]

Jordan

ROHDE & SCHWARZ Kazakhstan
Representative Office Almaty
Pl. Respubliki 15
480013 Almaty

[phone]
[phone]

RS-Kazakhstan@RUS-Rohde-

Schwarz.com

Kazakhstan

Excel Enterprises Ltd
Dunga Road
P.O.Box 42 788
Nairobi

[phone]
[phone]

Kenya

ROHDE & SCHWARZ Korea Ltd.
83-29 Nonhyun-Dong, Kangnam-Ku

Seoul 135-010

[phone]
[phone]

[e-mail]

[e-mail]

Korea

Group Five Trading & Contracting Co.
Mezanine Floor
Al-Bana Towers
Ahmad Al Jaber Street
Sharq

[phone]/73/74

[phone]

[e-mail]

Kuwait

ROHDE & SCHWARZ DANMARK A/S
Latvian Branch Office
Merkela iela 21-301
1050 Riga

[phone]
[phone]

[e-mail]

Latvia

ROHDE & SCHWARZ Liaison Office
c/o Haji Abdullah Alireza Co. Ltd.
P.O.Box 361
Riyadh 11411

[phone] Ext. 303
[phone] Ext. 229

[e-mail]

Lebanon

siehe / see SwitzerlandLiechtenstein

ROHDE & SCHWARZ DANMARK A/S
Lithuanian Office
Lukiskiu 5-228
2600 Vilnius

[phone]
[phone]

Lithuania

siehe / see BelgiumLuxembourg

siehe / see SloveniaMacedonia

DAGANG TEKNIK SDN. BHD.
No. 9, Jalan SS 4D/2
Selangor Darul Ehsan

47301 Petaling Jaya

[phone]
[phone]

[e-mail]

Malaysia

ITEC International Technology Ltd
B'Kara Road
San Gwann SGN 08

[phone] or 37 43 29

[phone]
[e-mail]

Malta

Rohde & Schwarz de Mexico (RSMX)
S. de R.L. de C.V.
German Centre Oficina 4-2-2
Av. Santa Fé 170
Col. Lomas de Santa Fé
01210 Mexico D.F.

[phone]
[phone]

[e-mail]-

schwarz.com

Mexico

Rohde & Schwarz de Mexico (RSMX)
Av. Prol. Americas No. 1600, 2° Piso
Col. Country Club
Guadalajara, Jal.
Mexico CP, 44610

[phone]
[phone]

Mexico

siehe / see RomaniaMoldavia

ROHDE & SCHWARZ NEDERLAND B.V.
Perkinsbaan 1
3439 ND Nieuwegein

[phone]
[phone]

[e-mail]

Netherlands

Nichecom
1 Lincoln Ave.

Tawa, Wellington

[phone]
[phone]

[e-mail]

New Zealand

siehe / see MexicoNicaragua

Ferrostaal (NIGERIA) Ltd.
P.O. Box 72021
27/29 Adeyamo Alkaija Street
Victoria Island
Lagos

[phone]
[phone]

[e-mail]

Nigeria

Adressen/Addresses

ROHDE & SCHWARZ NORGE AS
Enebakkveien 302 B
1188 Oslo

[phone]
[phone]

Norway

Mustafa Sultan
Science & Industry Co. LLC.
P.O.Box 3340
Postal Code 112
Ruwi

[phone]
[phone]

[e-mail]

Oman

Siemens Pakistan
23, West Jinnah Avenue
Islamabad

[phone]
[phone]

[e-mail]

Pakistan

siehe / see Mexico Panama

siehe / see AustraliaPapua-New

Guinea

MARCOM INDUSTRIAL EQUIPMENT, Inc.
6-L Vernida I Condominium
120 Amorsolo St.
Legaspi Village
Makati City/ Philippines 1229

[phone]
[phone]

[e-mail]

Philippines

ROHDE & SCHWARZ Österreich SP.z o.o.
Przedstawicielstwo w Polsce
ul. Stawki 2, Pietro 28
00-193 Warszawa

[phone]
[phone]

[e-mail]

Poland

Rohde & Schwarz Portugal, Lda.

Alameda Antonio Sergio, n° 7
R/C, Sala A
2795-023 Linda-a-Velha

[phone]
[phone]

[e-mail]

Portugal

ROHDE & SCHWARZ
Representation Office Bucharest
Str. Uranus 98
Sc. 2, Et. 5, Ap. 36
76102 Bucuresti, Sector 5

[phone]
[phone]

[e-mail]

Romania

ROHDE & SCHWARZ
Representative Office Moscow
119180, Yakimanskaya nab., 2
Moscow

[phone] to 53
[phone] to 53

[e-mail]

Russian
Federation

Mr. Chris Porzky
ROHDE & SCHWARZ International GmbH
c/o Haji Abdullah Alireza Co. Ltd.
P.O.Box 361
Riyadh 11411

[phone] Ext. 303

[phone] Ext. 229

[e-mail]

Saudi Arabia

Representative Office Belgrade
Tose Jovanovica 7
11030 Beograd

[phone]
[phone]

Serbia­Montenegro

Specialne systemy a software, a.s.
Svrcia ul.
841 04 Bratislava

[phone]
[phone]

[e-mail]

Slovak
Republic

ROHDE & SCHWARZ
Representation Ljubljana
Tbilisijska 89
1000 Ljubljana

[phone]
[phone]

[e-mail]

Slovenia

Protea Data Systems (Pty.) Ltd.
Communications and Measurement Division
Private Bag X19
Bramley 2018

[phone]
[phone]

[e-mail]

South Africa

Protea Data Systems (Pty.) Ltd.
Cape Town Branch
Unit G9, Centurion Business Park
Bosmandam Road
Milnerton
Cape Town, 7441

[phone]
[phone]

[e-mail]

South Africa

ROHDE & SCHWARZ ESPANA S.A.
Salcedo, 11
28034 Madrid

[phone]
[phone]

[e-mail]

Spain

LANKA AVIONICS
658/1/1, Negombo Road
Mattumagala
Ragama

[phone]
[phone]

[e-mail]

Sri Lanka

SolarMan Co. Ltd.
P.O.Box 11 545
North of Fraouq Cementry 6/7/9 Bldg. 16
Karthoum

[phone]
[phone]

[e-mail]

Sudan

ROHDE & SCHWARZ SVERIGE AB
Marketing Div.
Flygfältsgatan 15
128 30 Skarpnäck

[phone]
[phone]

[e-mail]

Sweden

Roschi Rohde & Schwarz AG
Mühlestr. 7
3063 Ittigen

[phone]
[phone]

[e-mail]

Switzerland

Electro Scientific Office

Baghdad Street
Dawara Clinical Lab. Bldg
P.O.Box 8162
Damascus

[phone]
[phone]

[e-mail]

Syria

Lancer Communication Co. Ltd.
for Div. 1 and 7
16F, No. 30, Pei-Ping East Road
Taipei

[phone]
[phone]

[e-mail]

Taiwan

System Communication Co. Ltd.
for Div. 2 and 8
16F, No. 30, Pei-Ping East Road
Taipei

[phone]
[phone]

[e-mail]

Taiwan

SSTL Group
P.O. Box 7512
Dunga Street Plot 343/345
Dar es Salaam

[phone]
[phone]

[e-mail]

Tanzania

Schmidt Electronics (Thailand) Ltd.
63 Government Housing Bank Bldg.
Tower II, 19th floor, Rama 9 Rd.
Huaykwang, Bangkapi
Bangkok 10320

[phone] to 39

[phone]

kamthoninthuyot@schmidtthailand.c

om

Thailand

TPP Operation Co., Ltd.
41/5 Mooban Tarinee
Boromrajchonnee Road
Talingchan, Bangkok 10170

[phone]
[phone]

[e-mail]

Thailand

siehe / see Mexico

Trinidad
&Tobago

ROHDE & SCHWARZ International GmbH
Liaison Office Istanbul
Bagdad Cad. 191/3, Arda Apt. B-Blok
81030 Selamicesme-Istanbul

[phone]
[phone]

[e-mail]

Turkey

ROHDE & SCHWARZ
Representative Office Kiev
4, Patris Loumoumba ul
01042 Kiev

[phone]
[phone]

[e-mail]

Ukraine

ROHDE & SCHWARZ International GmbH
Liaison Office Abu Dhabi
P.O. Box 31156
Abu Dhabi

[phone]
[phone]

[e-mail]-

schwarz.com

United Arab
Emirates

ROHDE & SCHWARZ Bick Mobile
Communication
P.O.Box 17466

Dubai

[phone]
[phone]

www.rsbick.de

United Arab
Emirates

Adressen/Addresses

ROHDE & SCHWARZ Emirates L.L.C.
P.O.Box 31156
Abu Dhabi

[phone]
[phone]

[e-mail]

United Arab
Emirates

ROHDE & SCHWARZ UK Ltd.
Ancells Business Park
Fleet
Hampshire
GU 51 2UZ England

[phone] (sales)

[phone] (service)

[phone]

[e-mail]

United
Kingdom

AEROMARINE S.A.
Cerro Largo 1497
11200 Montevideo

[phone]
[phone]

[e-mail]

Uruguay

ROHDE & SCHWARZ, Inc.
Broadcast & Comm. Equipment
(US Headquarters)
7150-K Riverwood Drive
Columbia, MD 21046

[phone]
[phone]

[e-mail]

[e-mail]

USA

Rohde & Schwarz Inc.
Marketing & Support Center / T&M
Equipment
2540 SW Alan Blumlein Way
M/S 58-925
Beaverton, OR 97077-0001

[phone]
[phone]

[e-mail]

USA

Rohde & Schwarz Inc.
Systems & EMI Products
8080 Tristar Drive
Suite 120
Irving, Texas 75063

[phone]
[phone]

[e-mail]

USA

EQUILAB TELECOM C.A.
Centro Seguros La Paz
Piso 6, Local E-61
Ava. Francisco de Miranda
Boleita, Caracas 1070

[phone]

[phone]

[e-mail]

Venezuela

REPRESENTACIONES BOPIC S.A.
Calle C-4
Qta. San Jose
Urb. Caurimare
Caracas 1061

[phone]
[phone]

[e-mail]

Venezuela

Schmidt Vietnam Co., (H.K.) Ltd.,
Representative Office in Hanoi
Intern. Technology Centre
8/F, HITC Building
239 Xuan Thuy Road
Cau Giay, Tu Liem
Hanoi

[phone]
[phone]

[e-mail]

Vietnam

siehe / see Mexico

West Indies

R&S FSH3 Front view

1 Putting into Operation

Front view

Status key

Rotary knob

Preset key

Setup key

Display

RS-232 optical
interface

Connector for
AC power supply

Softkeys

Function keys

Entry keys

Cursor keys

Unit keys

Generator output
N connector

RF input
N connector

Connector for
headphones

Softkey
lettering

On/off button

(alpha-)numeric
keypad

External trigger /external
reference input BNC connector

Connector for
power sensor

1145.5973.12 1.1 E-6

Putting into Operation R&S FSH3

Putting into Operation

The following section describes how to put the handheld Spectrum Analyzer into operation and how to
connect external devices, e.g. printers.

Section 2 describes the operation of the Spectrum Analyzer using simple measurements as examples.

Unpacking the Instrument

The R&S FSH3 comes in a formfitting packaging, consisting of an upper and a lower shell. Both shells
are held together by a tape wrapped around the packaging.

The packaging contains all accessories supplied.

¾ Undo the tape to unpack the analyzer.

Upper shell

Lower shell

CD-ROM

Headphones

Quick Start

manual

RS-232

cable

Power
supply

Mains plug

(country-specific)

R&S

FSH3

¾ Take out the R&S FSH3 and the accessories.

¾ Remove the protective foil from the screen.

Note: With the R &S FSH3 comes a Master PIN code de dicated to the s pecific instrume nt. Keep

your Master code in a secure place away from the R&S FSH3. Using the PIN code
protection the R&S FSH3 allows two wrong inputs. After the third wrong input the
R&S FSH3 asks for the Master code to start operation.

1145.5973.12 1.2 E-6

R&S FSH3 Putting into Operation

Setting up the Instrument

The Handheld Spectrum Analyzer R&S FSH3 has been designed for operation in labs as well as for on­site use for service and maintenance applications.

For any application, the R&S FSH3 can be set up to optimize ease of operation and the viewing angle
of the display.

When used as a desktop instrument, the R&S FSH3
can either be laid flat or it can be stood up using the
fold-out support at the back.

The R&S FSH3 can be laid flat for operation from
above. Because the grip is slightly raised at the back,
the R&S FSH3 is tilted forward to give the optimum
viewing angle for the display.

For use as a desktop, fold out the support at the rear
so that the instrument can easily be operated from the
front and the display can be read easily (see Fig.).

For on-site installation and service measurements, it is
best to hold the instrument with both hands. All the
controls are easy to reach (e.g. with your thumbs). Use
the R&S FSH-Z25 carrying bag so that you have both
hands free to adjust the DUT. The R&S FSH3 can be
attached to the loop provided on the open bag for this
purpose.

Attach the instrument to the bag by securing the carrying handle to the front of the carrying bag with the
Velcro tape.

The carrying handle at the top of the R&S FSH3 is also suitable e.g. for attaching the instrument to
cabinet doors.The shape of the grip ensures that the instrument does not fall off.

1145.5973.12 1.3 E-6

Putting into Operation R&S FSH3

Switching on the Spectrum Analyzer

The R&S FSH3 can be powered from the supplied AC-line adapter or the internal battery. When fully
charged, the built-in nickel metal hydride battery gives an operating time of about four hours. On
delivery, the battery in the R&S FSH3 may be flat. It must, therefore, be charged up before the
R&S FSH3 can be used. If the instrument is switched off, the charging time is four hours.
When the adapter is used, the R&S FSH3’s battery is charged simultaneously.

Insert the adapter jack plug into the POWER ADAPTER connector on the right-hand side of the carrying
handle so that it locks into position. Then, connect the adapter to an AC socket. The adapter voltage
range is 100 V to 240 V.

Caution!

Only the R&S FSH-Z33 adapter prov i ded m ay be us e d to power the R &S FSH 3 or char ge
the battery from the AC supply.

Prior to use, ensure that the AC s upply v olt age is c om pati bl e with th e vo lta ge spe c ifie d on
the adapter. Before inserting the adapter in the AC power outlet, s elect the appropriate
connector.

In vehicles, the battery can be charged from the cigarette lighter socket using the R&S FSH-Z21 cable.

Caution!

It is strictly forbidden to op erate the R&S FSH3 v ia the cigarette lighter socket while the
vehicle is in motion or the engine is running. In these cases, the R&S FSH3 must be off.

While the battery of the R&S FSH3 is being charged via the 12 V Car Adapter
R&S FSH-Z21, the latter must not under any circums tances be c onnect ed to the vehic le's
ground (for example, via the RF connector).

To switch on the R&S FSH3, press the yellow button

at the bottom left of the front panel.

The R&S FSH3 displays a connector symbol in the
middle of the display above the softkey labels to
indicate that it is mains powered.

When the R&S FSH3 is switched on, it recalls the settings that it was using when it was last switched
off.

Note: If the internal battery is complete ly flat, th e R&S FSH3 c annot be s witc h ed on, e v en though

it is powered from the mains via the adapter. In this case, the internal battery must be
charged for some time minutes with the instrument switched off. Only then can the
instrument be switched on.

1145.5973.12 1.4 E-6

R&S FSH3 Putting into Operation

Spectrum Analyzer Connectors

The R&S FSH3 has the following connectors:

RF input

Connect the RF input via a cable with an N connector to the DUT. Make sure it is not overloaded.

The maximum permissible continuous power at the RF input is 20 dBm (100 mW). It can be loaded with
up to 30 dBm (1 W) for at most three minutes. If the instrument is loaded with 1 W for longer, it heats up
to such an extent that it may be destroyed.

Caution!

The RF input is AC-couple d. However, the DC i nput volta ge must nev er exc eed the value
specified on the hous ing; otherwise the coupli ng capacitor at the input m ay be des troyed
and consequently the input attenuator or mixer too. T he RF input is protected fr om static
discharges and voltage pulses by a combination of limiting circuits and high-voltage
arresters.

Input for external trigger or external reference (EXT TRIG/EXT REF)

Via the EXT TRIG/EXT REF BNC connector, either an external trigger signal is applied to start a
measurement, or a 10 MHz reference signal is applied for frequency synchronization. The trigger
threshold is similar to that of TTL signals. The level of the reference signal must exceed 0 dBm.
Switchover between external trigger input and reference input is via the SETUP key.

DC connector for external power supply (on the right-hand side of the carrying handle).

The R&S FSH3 is powered from the AC/DC adapter via the DC connector and the R&S FSH3 internal
battery is also charged. The input voltage for the instrument must be between 15 V and 20 V. Power
consumption is approx. 7 W.

The battery can also be charged from a cigarette lighter socket in a vehicle. The adapter is available as
an R&S FSH3 accessory (R&S FSH-Z21, Order No. 1145.5873.02).

Caution!

While the battery of the R&S FSH3 is being charged via the 12 V Car Adapter
R&S FSH-Z21, the latter must not under any circums tances be c onnect ed to the vehic le's
ground (for example, via the R&S FSH3's RF connector or the power sensor).

Headphones connector (on the left-hand side of the carrying handle).

A 3.5 mm jack is provided for headphones. The internal impedance of the connector is approx. 10 Ω.

RS232 optical interface

(on the right-hand side of the R&S FSH3, can be accessed by folding out support).
The RS232 optical interface is for connecting a printer or PC. The RS232 Optical Interface Cable
R&S FSH-Z34 (supplied with the R&S FSH3) is used to make the connection. The optical connection
prevents spurious measurements being caused by interference from these devices.

Use the Serial/Parallel Converter R&S FSH-Z22 for printers with a parallel interface.

Connector for power sensor

The connector has been especially configured for R&S power sensors. The connector is used to power
the sensor and to transfer data via the power sensor’s interface. If the R&S FSH-Z2 (VSWR bridge and
power divider) is used, it is controlled by the connector.

1145.5973.12 1.5 E-6

Putting into Operation R&S FSH3

Tracking generator output (model 1145.5850.13 and 1145.5850.23 only)

Connect the tracking generator output to the DUT via an N connector. The nominal output level is

-20 dBm (100 µW). With model 1145.5850.23, the level can be switched between –20 dBm and 0 dBm
(1 mW).

Caution!

The output is AC-coupled and a v oltage that does not exceed the volt age stated on the
housing can be fed into the output; if this voltage is exceeded, the output may be
destroyed.

1145.5973.12 1.6 E-6

R&S FSH3 Putting into Operation

Screen Settings

The R&S FSH3’s screen is a transflective, passive color LCD. Indoors, its brightness depends on the
intensity of the backlighting. If light irradiation is strong, the ambient light supports readability. The
viewing angle can be optimized by adjusting the contrast. To achieve maximum contrast, the screen
can be switched from color display to black-and-white display.

To strike a balance between battery operating time and screen display quality, set backlighting to the
minimum brightness needed.

Setting brightness

¾ Press the SETUP key.

¾ Press the DISPLAY softkey.

The submenu with the contrast, lighting and color
settings opens.

¾ Use the Rotary knob or the Cursor keys to select

LIGHT... and confirm the selection by pressing the
DISPLAY softkey or the ENTER key again.

The BACKLIGHT sub-menu for the lighting level
opens. The level can be set to HIGH, NORMAL and
LOW.

¾ Use the Rotary knob or the Cursor keys to select the

setting you want and confirm the selection by
pressing the DISPLAY softkey or the ENTER key.

S etting the contrast

¾ Press the SETUP key.

¾ Press the DISPLAY softkey.

The submenu with the contrast, lighting and color
settings opens.

¾ Use the Rotary knob or the Cursor keys to select

CONTRAST... and confirm the selection by pressing
the DISPLAY softkey or the ENTER key again.

The contrast value entry box opens.

¾ Use the Rotary knob to adjust the contrast until the

screen readability is optimal.

When setting the contrast view the display at the same
angle that will be used for the application.

¾ Confirm the entry with the ENTER key or by

pressing the DISPLAY softkey again.

The R&S FSH3 displays the setting in the Display
Contrast line in the overview of the setup settings.

1145.5973.12 1.7 E-6

Putting into Operation R&S FSH3

Setting the screen color

¾ Press the SETUP key.

¾ Press the DISPLAY softkey.

The submenu with the contrast, lighting and color
settings opens.

¾ Use the rotary knob or the cursor keys to select

TYPE... and confirm the selection with the ENTER
key or by pressing the DISPLAY softkey again.

¾ In the submenu that opens, select COLOR or

BLACK/WHITE.

¾ Confirm the selection with the ENTER key or by

pressing the DISPLAY softkey again.

The R&S FSH3 switches to the selected color settings.

1145.5973.12 1.8 E-6

R&S FSH3 Putting into Operation

Country-Specific Settings

The R&S FSH3 is “multilingual” and can display text in the language of your choice. The softkey
lettering is always in English. The default setting (factory-setting) is also English.

Selection

¾ Press the SETUP key.

The R&S FSH3 displays all default settings. The last
two lines indicate the current language and the date
format.

¾ Press the LOCAL SETTINGS softkey.

A sub-menu with the LANGUAGE..., DATE FORMAT...
and UNIT OF LENGTH... entries opens. This menu
allows the entry of a country-specific language, date
format or the unit of length used by the R&S FSH3.

¾ Use the Rotary knob or the Cursor keys to select the

LANGUAGE... menu item you want and confirm the
selection with the ENTER key or by pressing the
LOCAL SETTINGS softkey again.

The languages available are displayed in a sub-menu.
The selected language is highlighted in red.

¾ Use the Rotary knob or the Cursor keys to select the

language you want.

The originally selected language is highlighted in
green. The red bar indicates the new selection.

¾ Confirm the new selection with the ENTER key or by

pressing the LOCAL SETTINGS softkey.

¾ Use the Rotary knob or the Cursor keys to select the DATE FORMAT... menu item and confirm the

selection with the ENTER key or by pressing the LOCAL SETTINGS softkey again.

¾ Use the Rotary knob or the Cursor keys to select the date format (dd/mm/yyyy or mm/dd/yyyy) and

confirm with the ENTER key.

¾ Use the Rotary knob or the Cursor keys to select the UNIT OF LENGTH... menu item and confirm

the selection with the ENTER key or by pressing the LOCAL SETTINGS softkey again.

¾ Use the Rotary knob or the Cursor keys to select the required unit of length (METER or FEET) and

confirm the selection with the ENTER key.

Note: The unit of length is relevant only with distanc e-to-faul t cable measur ements to d isplay th e

fault distance from the measurement plane.

1145.5973.12 1.9 E-6

Putting into Operation R&S FSH3

Setting the Date and Time

The R&S FSH3 has an internal clock that can date and time stamp, e.g. outputs to a printer or stored
data records. The user can reset the date and time.

Setting the date

¾ Press the SETUP key.

¾ Press the GENERAL softkey.

¾ Use the Rotary knob or the Cursor keys to select the

DATE... menu item and confirm the selection with
the ENTER key.

The value entry box above the row of softkey labels is
highlighted in red and displays the currently set date in
the selected format (dd/mm/yyyy or mm/dd/yyyy). The
active value entry field is highlighted in white.

¾ Depending on the date format, change the day (dd)

or month (mm) with the Rotary knob, Cursor keys or
a numerical entry and confirm the entry with the
ENTER key.

After the entry, the cursor automatically goes to the
second field in the date (day or month, depending on
the date format). Proceed with the next two fields as
with the first.

After the last data block has been entered, the R&S FSH3 verifies the validity of the entered date. If the
date is not valid, the R&S FSH3 sets the next valid date.

Setting the time

¾ Press the SETUP key.

¾ Press the GENERAL softkey.

¾ Use the Rotary knob or the Cursor keys to select the

TIME... menu item and confirm the selection with the
ENTER key.

The value entry box above the row of softkey labels is
highlighted in red and displays the currently set time in
the hours:minutes format. The hours display is
highlighted in white to enter a new value.

¾ Change the hours with the Rotary knob, Cursor keys

or numerical entry and confirm the entry with the
ENTER key.

After entry, the cursor automatically goes to the
minutes display. The entry is the same as for the hours
display.

After the minutes have been entered, the R&S FSH3 verifies the validity of the entered time. If the time
is not valid, the R&S FSH3 sets the next valid time.

1145.5973.12 1.10 E-6

R&S FSH3 Charging the Battery

Charging the Battery

The R&S FSH3 is fitted with a nickel metal hydride battery. The operating time is approx. four hours at
room temperature if the battery is fully charged.

Note: The battery in the R&S FSH3 is not charged when it leaves the factory. It must therefore

be charged after delivery.

When stored over an extended period, self-discharge reduces battery charge. The battery should
therefore be charged before use if it is going to be the sole power source for a long period of operation.

The charging status of the battery is displayed by a
symbol that looks like a battery in the middle of the
screen above the row of softkey labels. If the battery is
fully charged, the battery symbol is all white. As the
battery discharges, the white coloring disappears in
five steps until just the battery outline indicates that the
battery is flat.

Battery charge-level symbol

The battery is charged via the supplied adapter. It is connected to the jack on the right-hand side of the
carrying handle.

If required, equip the power supply with
the country-specific plug. Remove the
plug from the power supply towards the
front and firmly connect the appropriate
plug to the power supply.

Mains adapter

Power supply

DC power jack

For rapid charging, we urgently recommend that you switch off the R&S FSH3 during charging. The
charging time is approx. four hours.

If the R&S FSH3 is switched on, the charging current for the battery is reduced by the current drain of
the R&S FSH3, which means the battery might not be charged.

To save the battery, the R&S FSH3 has an automatic cut-off or auto power down mode which is
activated if no entry is made for a selectable time (5 or 30 minutes).

The auto power down mode is deactivated in the default setting.

The auto power down mode is set as follows:

1145.5973.12 1.11 E-6

Switchover External Reference / External Trigger R&S FSH3

¾ Press the GENERAL key.

The R&S FSH3 opens the submenu with the general
settings. The cursor is on the POWER DOWN menu
item.

¾ Confirm the POWER DOWN selection by pressing

the ENTER key.

The R&S FSH3 opens a selection window with the

settings: 5 minutes, 30 minutes and DISABLE.

¾ Use the Rotary knob or the Cursor keys to select the

setting you want and confirm by pressing the
ENTER key or the GENERAL softkey.

Switchover External Reference / External Trigger

The Ext Trig/Ext Ref BNC connector on top of the R&S FSH3 can be used either as an input for an
external trigger or an external reference. Switchover is via the Setup menu.

¾ Press the SETUP key.

¾ Press the HARDWARE SETUP softkey.

The active input setting is highlighted in green.

¾ Use the Rotary knob or the Cursor keys to select

EXT REF or EXT TRIG.

¾ Confirm the selection with the ENTER key or the

HARDWARE SETUP softkey.

The EXT TRIG setting is only for input configuration. The use of the external trigger must be set in the
Sweep menu (SWEEP key, TRIGGER softkey).

The input setting can be queried via the status display (press STATUS key).

1145.5973.12 1.12 E-6

R&S FSH3 Using a Preamplifier

Using a Preamplifier

(only model 1145.5850.23)

The R&S FSH3 model 1145.5850.23 comes with an internal preamplifier for increasing sensitivity.
Depending on the frequency, this amplifier has 15 dB to 18 dB gain and increases sensitivity by 10 to
15 dB. It is fitted behind the RF attenuator before the input mixer.

¾ Press the SETUP key.

¾ Press the HARDWARE SETUP softkey.

¾ Use the Rotary knob or the Cursor keys to select

PREAMP... .

¾ Confirm the selection with the ENTER key or the

HARDWARE SETUP softkey.

The R&S FSH3 changes to the submenu for
preamplifier configuration. The selection bar indicates
the active setting.

¾ Use the Rotary knob or the Cursor keys to select the

setting you want (ON or OFF) and confirm the
selection by pressing the ENTER key.

If the preamplifier is switched on, its use is coupled to the reference level, thus ensuring at all times
optimum dynamic range of the R&S FSH3. The table below shows the positions of the RF attenuator
and the preamplifier as a function of the reference level.

Preamplifier

OFF

Preamplifier

ON

Ref Level

RF attenuation RF attenuation Preamplifier

≤ -25 dBm

0 dB 0 dB On

-24 dBm to –15 dBm 0 dB 10 dB On

-14 dBm to –10 dBm 0 dB 0 dB Off

-9 dBm to 0 dBm 10 dB 10 dB Off

1 dBm to 10 dBm 20 dB 20 dB Off

11 dBm to 20 dBm 30 dB 30 dB Off

The attenuator position can be queried at any time via the status display.

1145.5973.12 1.13 E-6

PIN Code Entry R&S FSH3

PIN Code Entry

To prevent unauthorized use, the R&S FSH3 can be protected with a PIN code.

When the R&S FSH3 is delivered, the PIN code is set to 0000 and PIN code entry is disabled when the
R&S FSH3 is switched on. A PIN code, i.e. a four-digit number, can be re-entered whenever you wish.
But it is only activated after the PIN code mode has been enabled.

A new PIN code is entered as follows:

¾ Press the SETUP key to call the Setup menu and

the instrument settings.

¾ Press the GENERAL softkey.

Use the Rotary knob or the Cursor keys to select the
PINCODE... menu item and press the ENTER key.
The selection box with the PIN code settings is
opened.

The current PIN code must be entered before it can be modified. This prevents unauthorized PIN code
modification.

¾ Enter your valid PIN code.

When the R&S FSH3 is delivered the valid PIN code is 0000.

When you have entered your valid PIN code, the PIN-code functions can be selected from the
selection box. When the R&S FSH3 has been delivered, a new PIN code can only be activated if it
differs from the factory-set PIN code.

Note: Befor e the PIN code mode is activated, we strongly recommend enterin g a user-defined

PIN code. Keep your PIN code in a sec ure place away from the R&S FSH3. If the active
PIN code is not ava ilable the ins trument can b e reset to the default PIN c ode ('0000') with
the Master PIN code delivered with each instrument. If the Master PIN code is not
available please contact an authorized R&S service center.

Entering a new PIN code

¾ Use the Rotary knob or the Cursor keys to select the New Pincode... menu item in the selection box

and enter a new four-digit PIN. Confirm with ENTER.

The R&S FSH3 will ask you to re-enter the PIN, to prevent incorrect entries.

¾ Re-enter PIN.

Activating the PIN code mode

¾ Use the Rotary knob or the Cursor keys to select the PINCODE ON menu item and press the

ENTER key.

The R&S FSH3 now asks you to enter the PIN code prior to its activation.

¾ Enter the PIN code and confirm the entry with the ENTER key.

1145.5973.12 1.14 E-6

R&S FSH3 PIN Code Entry

The selected PIN code is now activated. The next time the R&S FSH3 is switched on, the PIN code
must be entered before the instrument can be operated. When a wrong PIN code is input the
R&S FSH3 asks again for the PIN code. After three trials with the wrong key code it asks for the Master
code.

Note: The R&S FSH3 comes with ‘PIN cod e protected ’ labels. If the instr ument is protected wit h

a PIN code, affix the label to the instrument. This warns unauthorized users that they
cannot operate the R&S FSH3.

Deactivating PIN code protection

¾ Use the Rotary knob or the Cursor keys to select the PINCODE OFF menu item and press the

ENTER key.

Prior to deactivation, the R&S FSH3 asks you to enter your PIN code. This prevents unauthorized
deactivation of PIN code protection.

¾ Enter your PIN code number and confirm the entry with the ENTER key.

The R&S FSH3 can now be operated without PIN code protection.

1145.5973.12 1.15 E-6

Connecting Printers R&S FSH3

Connecting Printers

The R&S FSH3 can output a screen shot to a printer equipped with an RS232 interface. Use the
Serial/Parallel Converter R&S FSH-Z22 for printers with a parallel interface.

A printer with an RS232 interface can be directly connected using the RS232 optical interface cable
supplied. If the R&S FSH-Z22 is used, its RS232 optical cable is connected to the R&S FSH3’s optical
interface, freeing up the Centronics parallel interface to connect a printer.

¾ Fold out the support at the rear of the

R&S FSH3.

¾ Connect the optical connector of the

RS-232 cable to the optical interface
on the right-hand side of the
R&S FSH3.

¾ Connect the 9-pin D-Sub connector of

the cable to the RS-232 input of the
printer.

Optical RS-232
interface

RS-232 cable

9-pin
connector

Connect printers with a parallel interface to the R&S FSH3 using the Serial/Parallel Converter
R&S FSH-Z22, freeing up the Centronics parallel interface to connect a printer. The R&S FSH-Z22 is
powered by a 9 V alkaline battery (NEDA, IEC6LR61).

¾ Fold out the support at the rear of the

R&S FSH3.

¾ Connect the optical connector of the

R&S FSH-Z22 to the optical interface
on the right-hand side of the
R&S FSH3.

¾ Connect the printer cable to the 25-

pin interface of the R&S FSH-Z22.

¾ Switch on the serial/parallel converter

using the slide switch on its top.

Slide switch positions:

OFF The R&S FSH-Z22 is off.

ON The R&S FSH-Z22 is on, and

the Battery OK LED flashes.

AUTO OFF The R&S FSH-Z22 is on, and

the Battery OK LED flashes. If
data transmission is interrup­ted for more than 5 minutes,
the R&S FSH-Z22 is switched
off automatically.

Optical RS-232
interface

R&S
FSH-Z22

While data is transmitted to the printer, the "Busy" LED lights up.

1145.5973.12 1.16 E-6

R&S FSH3 Connecting Printers

Note: The R&S FSH-Z22 is designed for a data transmission rate of max. 38400 baud (= default

setting). Therefore, set the baud rate (PRINTER BAUD RATE) in the SETUP menu to
38400 baud. The baud rat e s 9600 bau d a nd 192 00 ba ud c an als o be set o n the R&S FSH­Z22 by opening the ist cabinet.

Selecting a printer

¾ Press the SETUP key on the R&S FSH3.

The R&S FSH3 displays the selected printer and its
baud rate in the setup settings.

To select another printer, proceed as follows:

¾ Press the GENERAL softkey.

¾ Use the Rotary knob or the Cursor keys to select the

PRINTER TYPE... menu item and confirm the entry
with the ENTER key or by pressing the GENERAL
softkey again.

¾ Use the Rotary knob or the Cursor keys to select the

printer you want and confirm the entry with the
ENTER key or by pressing the GENERAL softkey
again.

The R&S FSH3 displays the selected printer under
"Printer Type".

Next, set the baud rate for the selected printer.

¾ Press the GENERAL softkey.

¾ Use the Rotary knob or the Cursor keys to select the

PRINTER BAUD... menu item and confirm the
selection with the ENTER key.

The selection box for the baud rates available
(1200 baud to 115200 baud) opens.

¾ Use the Rotary knob or the Cursor keys to select the

baud rate you want and confirm the entry with the
ENTER key or by pressing again the GENERAL
softkey.

The R&S FSH3 displays the selected baud rate under
"RS232 Baudrate" in the setup display.

Note: If the serial/parallel converter (R&S FSH-Z22) is used to control a printer with a parallel

interface, set the RS232 interface to 38400 baud.

The contents of the setup display can be output to the printer by pressing the SETUP -> PRINTER
softkey.

1145.5973.12 1.17 E-6

Enabling Options R&S FSH3

1145.5973.12 1.18 E-6

Enabling Options

The R&S FSH3 can be fitted with options (e.g. distance-to-fault measurements on cables) which are
enabled by entering a key code. The key code is based on the unique serial number of the instrument.
To retrofit an option, enable it with a key code.

Operation

¾ Press the SETUP key.

¾ Press the GENERAL key.

¾ Use the Rotary knob or the Cursor keys to select the OPTIONS... menu item and confirm the entry

with the ENTER key.

Enter the key code (ten-digit number) for the option with the decimal keys and confirm with the ENTER
key.

If the correct key code is entered, the R&S FSH3 displays "<....> Option enabled".

If an invalid key code is entered, the R&S FSH3 displays "Option key error".
The correct key code can then be entered.

R&S FSH3 Measurements on CW Signals

2 Getting Started

This section expl ains the basic operation of the Handheld Spectrum Analyzer R&S FSH3 using some
simple measurements as examples. A more detailed description of operation and functions, such as
selecting menus and setting measurement parameters, is given in section 3 of the Manual.

Measurements on CW Signals

A basic task performed by Spectrum Analyzers is measurin g the level and frequenc y of sine signals.
The following exam ples illustrate the most effective way of performing these measurements with the
R&S FSH3.

A signal generator is used as a signal source, e.g. the Signal Generator R&S SML.

Measurement setup:

Connect the RF output of the signal generator to the RF input of the R&S FSH3.
Signal generator settings:

Frequency 100 MHz
Level -30 dBm

Level measurement

First, set the R&S FSH3 to its default settings to show all the operating steps that are required.
¾ Press the PRES ET key.

The analyzer displays the frequency spectrum from
100 kHz to 3 GHz – the R&S FSH3’s maximum
Frequency Span. At 100 MHz, the generator signal is
displayed as a ver tical line. Generator harmonic s can
also be seen as li nes at frequenc ies which are int eger
multiples of 100 MHz.

To analyze the generator signal at 100 MHz in more
detail, reduce the Frequency Span. Set the
R&S FSH3’s Center Frequency to 100 MHz and
reduce the span to 10 MHz.

1145.5973.12 2.1 E-6

Measurements on CW Signals R&S FSH3

¾ Press the FREQ key.
¾ Enter “100” using the numeric keypad and confirm

the entry with the MHz key.

¾ Press the SPAN key.
¾ Enter “10” using the numeric keypad and confirm the

entry with the MHz key.

The R&S FSH3 now displays the generator signal with
a higher resolution.

The R&S FSH3 has markers for reading off signal levels and frequencies. Markers are always
positioned on the trace. Both the level and frequency at their current positions are displayed on the
screen.

¾ Press the marker key.
The marker is ac tivated a nd is autom atic all y posit ione d

on the trace maximum. A vertical line on the
measurement diagram indicates the m arker frequenc y.
A short horizontal line on the trace indicates the level.

The R&S FSH3 displays the marker frequency and
level numerically at the top of the measurement
diagram.

Setting the Reference Level

The level shown b y Spectrum Analyzer s at the top of the m easurem ent diagram is calle d the ref erence
level (REF LEVEL). To get the best dynamic range out of a Spectrum Analyzer, its full level range
should be used. This m eans that the maximum spectrum level should be at or close to the top of the
measurement diagram (= reference level).

The reference level is the maximum level on the level axis (y-axis).
Reduce the reference level by 10 dB to increase the dynamic range.

¾ Press the AMPT key.
The softkeys for the AM PT menu ar e displayed a nd the REF LEVE L softk ey label is highl ighted in re d,

i. e. it is enabled for value entry. The red value entry box at the bottom right of the measurement
diagram displays the current reference level.

¾ Enter “30” using the numeric keypad and confirm the entry with the dBm key.
The reference leve l is now set to –30 dBm. The maximum trace value is clos e to the maximum scale

value of the meas urem ent diagram. The increase in the disp la yed nois e floor is minim al. T he diff erenc e
between the signal m aximum and the displa yed noise (i.e. the dynamic range ) has, however, been
increased.

1145.5973.12 2.2 E-6

R&S FSH3 Measurements on CW Signals

Using markers is als o an effec tive way of s hifting the tr ace maxim um so that it coinc ides with the to p of
the measurement diagr am. If the marker is positioned on the trace m aximum (as in the example), the
reference level can be set to the marker level by entering the following keystrokes:

¾ Press the MARKER key.
¾ Press the SET MARKER softkey.
¾ Select REF LVL = MRK LVL in the sub-menu using the Rotary knob or the Cursor keys.
¾ Press the ENTER key.

The reference leve l is then set to the m easured level indicat ed by the marker. Onl y a few keystrokes
are needed to set the optimal reference level.

Frequency Measurements

The R&S FSH3’s trace dis pla ys 301 meas urem ent points (ass ocia ted with 301 freque ncy or tim e points
along the x-axis). The marker is always positioned on one of these measurement points. The
R&S FSH3 calculates the marker frequency from the measurement-point frequency, and the Center
Frequency and Frequency Span that have been set. The measurement-point resolution, and
consequently the accurac y of the marker f requency readout, therefor e depend on the Frequenc y Span
that has been selected.

The R&S FSH3 has a frequency counter to increase the accur acy of the mark er-frequency readout, It
stops the sweep at the marker position, counts the frequency and then continues the sweep.

The following measurement example is based on the previous example.
¾ Press the MARKER MODE softkey in the marker

menu.

The marker mode selection box opens.
¾ Select FREQ COU NT in the select ion box using t he

Rotary knob or the Cursor keys.
¾ Press the ENTER key.
The lettering 'Mark:' at the top left of the measur ement

diagram changes to 'Count:' to tell the user that the
frequency counter has been switched on. The
resolution of the frequency readout is now 1 Hz, no
matter what span has been set. The accuracy is
determined by the R&S FSH3’s internal reference
frequency. It is far higher than that of pixel-oriented,
marker-frequency readout.

1145.5973.12 2.3 E-6

Measurements on CW Signals R&S FSH3

Harmonic Measurements

As a Spectrum Anal yzer can resol ve different s ignals in the fr equency dom ain, it is idea l for meas uring
harmonic levels or harmonic ratios. To speed up these procedures, the R&S FSH3 has marker
functions that deliver fast results with only a few keystrokes.

As above, a signal generat or with a 100 MHz output frequenc y and an output lev el of –20 dBm is used
in the following measurement example.

First, the R&S FSH3 is set to its default settings to show all measurement steps that are needed.
¾ Press the PRES ET key.

The analyzer displays the frequency spectrum from 100 kHz to 3 GHz, the largest available span. At

100 MHz, the generator signal is displayed as a line. The generator harmonics are displayed as lines

at frequencies which are integral multiples of 100 MHz.
To measure the 2nd harmonic ratio, set the Start and Stop Frequency as follows:

¾ Press the FREQ key.
The softkey menu opens for frequency entry.

¾ Press the START softkey.
¾ Enter '50' using the numeric keypad and confirm the entry with the MHz key.
¾ Press the STOP softkey.
¾ Enter '250' using the numeric keypad and confirm the entry with the MHz key.

The R&S FSH3 now displa ys the s pec trum from 50 MHz to 250 MHz, and so t he signal at 100 MHz and
its 2nd harmonic at 200 MHz.

To measure the harm onic ratio, set the marker on th e fundamental and the delta mark er on the 2nd
harmonic.

¾ Press the MARKER key.
The softkey menu opens for marker entry and

automatically positions the main marker on the trace
maximum.

¾ Press the DELTA softkey.
The delta mark er is activated (vertical dot ted line) and

is automaticall y placed on the next trace maximum (=
2nd harmonic).

The harmonic ratio can be read off directly in dB from
the numeric delta-marker display.

1145.5973.12 2.4 E-6

R&S FSH3 Measurements on CW Signals

Power Measurements Using the Power Sensor

For most accurate measurement of power the R&S FSH3 provides the possibility to use the Power
Sensor R&S FSH-Z1 or R&S FSH-Z18. They measure power in the frequency range 10 MHz to 8 GHz
or 10 MHz to 18 GHz, respectively.

The Power Sensor R&S FSH-Z1 or R&S FSH-Z18 is c ontrolled and powered via a special RS- 232-C
interface on top of the instrument.

Power Sensor connector

(Device under Test)

Power Sensor

R&S FSH-Z1 or

R&S FSH-Z18

RS-232 interface

for Power Sensor

The continuous power applied to the power sensor’s input must not exceed 400 mW
(26 dBm). Short (

≤

10 µs) power peaks up to 1 W (30 dBm) are however permissible.
Higher input powers m ay d es troy the s e nsor . An atte n uator pad mus t be used to ensure
that the maximum permissible power for the sensor is never exceeded when
measurements are made on high-power transmitters.

¾ Connect the power sensor cable to the R&S FSH3’s power sensor connector and screw into position.
¾ Press the MEAS key.
¾ Press the MEASURE softkey.
¾ Using t he Cur sor k eys or th e Rot ary knob, s elec t the P OW ER SENSOR m enu item and c onfirm your

selection with the ENTER key or the MEASUR E softkey.

The R&S FSH3 opens the screen f or power m easur em ents. If a power sens or has not been c onnected,
no measured value is displayed. If a power sensor has been connected, the R&S FSH3 sets up a
connection via the RS232 interface and after a few seconds displays the measured power.

If there are any communication problems with the power sensor, the R&S FSH3 outputs error
messages (Sensor error: Error number) indicating the possible causes (see Main Manual).

To compensate for i nternal offset of the power m eter it needs to be com pensated before starting the
measurement.

1145.5973.12 2.5 E-6

Measurements on CW Signals R&S FSH3

¾ Press the ZERO softkey.
The R&S FSH3 outputs a message to tell the user not

to apply any signals to the power meter when zeroing
is being performed.

¾ Disconnect the power sensor from any signal

sources.

¾ Start zeroing with the first or second softkey

(CONTINUE).

The R&S FSH3 immediately starts power meter
zeroing. While th is process is going o n, the R&S FSH3
outputs the message “Zeroing power sensor, please
wait..”.

When zeroing is over, the R&S FSH3 outputs the
message "Power Sensor Zero OK" and switches back
to the softkey menu for the power sensor.

¾ Connect now the signal under test.
The R&S FSH3 shows the measures power level in dBm.

For most accurate measurement input the frequency of the signal under test.

¾ Press the FREQ softkey.
¾ Using the number keys, enter the frequency you

want and confirm the entr y with the ENTER ke y or
by pressing the FREQ softkey again.

The R&S FSH3 transfers the new frequency to the
power sensor which the n corr ects the m eas ured powe r
readings.

1145.5973.12 2.6 E-6

R&S FSH3 Measurements on CW Signals

Power and Reflection Measurements with the R&S FSH-Z44

The Directional Power Sensor R&S FSH-Z44 is connected between the source and the load and
measures the power f lux in both directions, i.e. f rom the source to the load (for ward power) and from
the load to the source (reverse power). The ratio between reverse power and forward power is a
measure of the load matching and is displayed as the return loss or standing wave ratio.

The Directional Power Sensor R&S FSH-Z44 has an unsymmetrical design and must therefore be
inserted into the t est setup in such a wa y that the FORWARD arrow o n the sensor points towar d the
load (= in the direction of the power flux).
It is driven and powered via a special serial interface.

The cable on the power sens or must be c onnected and sc rew-fastened to th e Power Sensor connector
on the R&S FSH3. The directional power s ensor itself has to be inserted betwe en the source and the
load.

Directional Power Sensor

R&S FSH-Z44

Source

Load

Power Sen sor
connector

When measuring high p owers, please pay strict atten tion to the fol lowing instruc tions to avoid pers onal
injury and prevent destruction of the power sensor:

• Never exceed the permissible continuous power (see diagram on the rear of the
sensor).

• Connect the sensor only when the RF power is off.

• The RF connectors must be screwed tight.

Failure to follow these rules can lead to injuries such as skin burns or cause the
destruction of the measurement inst ru ments in us e.

Operation:

¾ Press the MEAS key.
¾ Press the MEASURE softkey.

The R&S FSH3 opens the menu for the measurement functions.
Use the cursor ke ys or the rotary knob to select POW ER SENSOR and c onfirm your sel ection with the

ENTER key or by pressing the MEASURE softkey.

1145.5973.12 2.7 E-6

Measurements on CW Signals R&S FSH3

The R&S FSH3 opens the screen and the menu for the power measurement. If no power sensor is
connected, no measur ed value is dis pla yed. If a power sensor is connected, th e R&S FSH3 establ ishes
a connection to the power sensor via the interface and displays after a few seconds the connected
power sensor type (R&S FSH-Z44) as well as the measured forward power and return loss of the load.

Before performing the power measurement, the power sensor should be zeroed.
¾ Press the ZERO softkey.

The R&S FSH3 informs the user that no signals m ust
be applied while the power sensor is being zeroed.

¾ Disconnect the power sensor from any signal

sources.

¾ Start zeroing with the first or second softkey

(CONTINUE).

Softkey 4 or 5 (CANCEL) can be used to cancel
zeroing before it begins if, for example, the signal
source cannot be disconnected.

The R&S FSH3 imm ediate l y star ts p o wer sens or zer oi ng. While this is g oi ng o n, t he R &S F SH3 ou tputs

he message "Zeroing power sensor, please wait...". t

When zeroing is over, the R&S FSH 3 outp uts the message "Power Sensor Z ero O K" an d s witc hes bac k
to the softkey menu for the power sensor.

¾ Now connect the R&S FSH-Z44 between the source and the load.
¾ The R&S FSH3 displays th e measured for ward power level i n dBm and the retur n loss of the load in

dB.

To achieve highest measurement accuracy, enter the frequency of the signal under test.
¾ Press the FREQ softkey.

The R&S FSH3 opens the entry box for the frequency.
¾ Using the num ber ke ys, enter the des ired frequenc y

and terminate the input with the ENTER key or by
pressing the FREQ softkey again.

The R&S FSH3 transfers the new frequency to the
power sensor which the n corr ects the m eas ured powe r
readings.

1145.5973.12 2.8 E-6

R&S FSH3 Measurements on CW Signals

Two Port Transmission measurements

(only for R&S FSH3 with tracking generator: order No. 1145.5850.13 or 1145.5850.23).
For measurement of the gain or attenuation of two port devices the R&S FSH3 provides a tracking

generator. It generates a sinewave signal at exactly the receive frequency of the Spectrum Analyzer.

¾ Press the MEAS key.
¾ Press the MEASURE softkey.

The measurement function menu opens.
¾ Using the Cursor keys or the Rotar y knob, select the TRACKING GEN menu item and conf irm your

selection with the ENTER key or the MEAS softkey.

The R&S FSH3 turns on the tracking generator and switches to its softkey menu.
When the tracking gener ator is switc hed on, th e R&S FSH3 d ispla ys Track Gen Uncal . This ind icates

that tracking generator measurements are uncalibrated.
Before calibration , the frequenc y range you wa nt should be set b ecause calibr ation is only valid for the

calibrated frequency range. Changing the frequency settings after calibration invalidates calibration.

¾ Press the FREQ key.
¾ Using the number keys enter the Center Frequency.
¾ Press the SPAN key.
¾ Using the number keys, enter the span.

Alternately the Start and Stop Frequency can be input using the START and STOP softkey in the
frequency menu.

Calibrate the R&S FSH3 for the transfer function measurement.

¾ Press the MEAS key.
¾ Press the TRANSM CAL softkey.

The R&S FSH3 now prompts you to connect the RF
input to the tracking generator’s output so that
calibration can be carried out.

¾ Connect the RF output to the generator’s input

without the DUT.
¾ Press the CONTINUE softkey to start calibration.
During calibration the R &S FSH3 outputs the mes sage

"Calibrating THROUGH, please wait..".

When calibration is over, the R&S FSH3 outputs the
message "Transm. calibrated" for 3 seconds.

1145.5973.12 2.9 E-6

Measurements on CW Signals R&S FSH3

The R&S FSH3 displays now T ransmis sion in the t op
right-hand corner of the measurement diagram. This
tells the user that t he R&S FSH3 has been ca librated
for transfer function measurements.

¾ Connect the DUT between the RF input and the

generator's output.
The R&S FSH3 displays the magnitude of the transfer

function. Values ca n be rea d out with, f or exam ple, the
markers.

The transmission c alibration remains valid until t he Center Frequency or the span is changed on the
R&S FSH3. Track G en Uncal is displayed in t he top right-hand cor ner of the screen when calibration
is no longer valid.

If the reference is changed after calibration, greater m easurement uncertainty m ust be anticipated (up
to 1 dB). The R&S FSH3 retains the calibration data but displays a red dot in front of Transmission .

When saving a data set for a scalar transmission measurement in a calibrated state, the R&S FSH3 can
store the calibration data along with the other settings (see section "Saving Calibrat ion Data"). Thus
after recalling the setting, a measurement can be performed without prior calibration, providing the
instrument's tem perature does not d eviate m ore than 5 °C f rom its tem perature when the data set was
stored.

If the temperature dev iation is great er, the R &S FSH3 outp uts a (r ed) dot in fr ont of • Transm iss ion . A
precise measurement can then only be made after a calibration.

1145.5973.12 2.10 E-6

R&S FSH3 Measurements on CW Signals

Measurement of Return Loss

(only for R&S FSH3 with tracking generator: order No. 1145.5850.13 or 1145.5850.23).
For reflection meas urement the VSWR Bridge an d Power Divider R&S F SH-Z2 and a Short standard

(supplied with the R&S FSH-Z2) are needed. The R&S FSH-Z2 is directly screwed to the RF input
connector and the generator’s output.

Test port

Control

cable

VSWR Bridge and

Power Divider

R&S FSH-Z2

¾ Connect the control cable of the R&S FSH-Z2 to the Power Sensor connector of the R&S FSH3.
¾ Connect the RF and Ge nerator port of the R& S FSH-Z2 to the RF input and generator output of the

R&S FSH3.
The test setup must be calibrated before any measurements are made. This is done with a short and an

open at the point were t he reflection meas urement is to be made. If a cable is to be inserted between
the DUT and the bridge, perform the calibration at the measurement end of the cable.

¾ Press the MEAS key.
¾ Press the MEASURE softkey.
¾ Using the Cursor keys or the Rotar y knob, select the TRACKING GEN menu item and conf irm your

selection with the ENTER key or the MEAS softkey.
The R&S FSH3 turns on the tracking generator and switches to its softkey menu.

When the tracking gener ator is switc hed on, th e R&S FSH3 d ispla ys Track Gen Uncal . This ind icates
that tracking generator measurements are uncalibrated.

Before calibration , the frequenc y range you wa nt should be set b ecause calibr ation is only valid for the
calibrated frequency range. Changing the frequency settings after calibration invalidates calibration.

¾ Press the FREQ key.
¾ Using the number keys enter the Center Frequency.
¾ Press the SPAN key.
¾ Using the number keys, enter the span.

Alternately the Start and Stop Frequency can be input using the START and STOP softkey in the
frequency menu.

1145.5973.12 2.11 E-6

Measurements on CW Signals R&S FSH3

Calibrate the R&S FSH3 for the reflection measurement.
¾ Press the REFLECT CAL softkey.

The R&S FSH3 prompts the user to leave the
measurement port open.

¾ Leave the test port of the R&S FSH-Z2 open.
¾ By the CONTINUE softkey start the OPEN cali-

bration.
While calibration is in progr ess, the R&S FSH3 output s

the message "Calibrating OPEN, please wait... ".

When OPEN calibration is over, the R&S FSH3 prompts the user to perform SHORT calibration.

¾ Connect a short to the test port of the R&S FSH-Z2.
¾ Using CONTINUE start the SHORT calibration.

While calibration is in progr ess, the R&S FSH3 output s
the message "Calibrating SHORT, please wait... ".

When calibration is over, the R&S FSH3 outputs the
message "Reflect. calibrated" for 3 seconds.

Reflection is dis played in the t op right-han d corner of
the measurement diagram to indicate that the
R&S FSH3 is calibrated for reflection measurements.

¾ Connect the DUT to the measurement port of the

VSWR bridge.
The R&S FSH3 displays the return loss of the DUT.

The transmission calibration remains valid until the R&S FSH3’s Center Frequency or span are
changed. If calibration becomes invalid, the R&S FSH3 dis plays Tr ack Gen Uncal in the top r ig ht-hand
corner of the screen.

If the reference is changed af ter c alibration, a l arger m easurem ent unc ertain ty m ust be anticip ated. T he
R&S FSH3 retains the calibration data, but places a red dot in front of the Reflection display to
indicates possible increase in measurement uncertainty.

1145.5973.12 2.12 E-6

R&S FSH3 Measurements on CW Signals

When saving a data s et for a scalar reflect ion measurement in a c alibrated state, the R&S FSH3 can
store the calibration data along with the other settings (see section "Saving Calibrat ion Data"). Thus
after recalling the setting, a measurement can be performed without prior calibration, providing the
instrument's tem perature does not d eviate m ore than 5 °C f rom its tem perature when the data set was
stored.

If the temperature deviat ion is greater, the R&S FSH 3 outputs a (red) dot in front of • Reflection . A
precise measurement can then only be made after a calibration.

1145.5973.12 2.13 E-6

Measurements on CW Signals R&S FSH3

Performing Distance to Fault Measurement

(only for R&S FSH3 with track ing generator (order No . 1145.5850 .13 or 1 145.5850.2 3), instal led optio n
R&S FSH-B1 (Distance to Fault Measurement) and VSWR Bridge and Power Divider R&S FSH-Z2).

Control

cable

RF connector

VSWR Bridge and

Power Divider

R&S FSH-Z2

Test port

Generator

output

Measurement

cable

Short

Cable

under Test

¾ Connect the control cable of the R&S FSH-Z2 to the Power Sensor connector of the R&S FSH3.
¾ Connect the RF and Ge nerator port of the R& S FSH-Z2 to the RF input and generator output of the

R&S FSH3.
¾ Connect the 1-m test cable supplied with option R&S FSH-B1 to the bridge test port.

N.B.: The 1-m cable must be used. Results are useless without this cable.

¾ Press the MEAS key.
¾ Press the MEASURE softkey.
¾ Using the Cursor k eys or the Rotar y knob, select the DISTANCE TO FAULT menu item and confirm

your selection with the ENTER key or the MEAS softkey.
The R&S FSH3 turns on the "Distance to Fault" measurement function.

The R&S FSH3 delivers best results, if the Center Fre quency is set to th e frequency the dev ice under
test is operated.

¾ Press the FREQ key.
¾ Input the Center Frequency (e.g. frequency of the antenna at the end of the cable under test).

1145.5973.12 2.14 E-6

R&S FSH3 Measurements on CW Signals

To perform distance-to-fault cable measurements, the R&S FSH3 needs to “know” the type of cable and
its approximate length. Frequency-dependent cable models can be generated with the supplied
R&S FSH View Windows software package and loaded onto the R&S FSH3. The procedure is
described in the R&S FSH View manual. The cable parameters for a frequency can also be entered
directly.

Selecting a cable model from the list:

¾ Press the MEAS key.
¾ Press the CABLE MODEL softkey.

The R&S FSH3 displays the list of loaded cable
models.

¾ Using the Rotar y knob or the Cursor keys select th e

appropriate cable model.
¾ Using th e sof tkey SELE CT, ac tivate th e cable m odel

you have selected.
The analyzer returns to the DTF measurement menu

and displays the cable used for the measurement in
the top right-hand corner of the screen.

Entering the cable parameters at a frequency:

If cables are use d that are not in the list of cab le m odels store d in t he R& S FSH3, it is pos sible to ent er
the cable parameters at a frequency. It is advisable to use the Center Frequency of the DTF
measurement.

¾ Press the MEAS key.
¾ Press the CABLE MODEL softkey.

The R&S FSH3 displays the list of loaded cable
models (if available).

¾ Press the SELECT USER MOD softkey.
The softkey is highlighted in green to indicate that a

user-specific cable model has been chosen.
The cable model is defined with the DEFINE USER

MOD softkey.

¾ Press the DEFINE USER MOD softkey.
The R&S FSH3 opens a submenu for defining the

FREQUENCY, the VELOCITY FACTOR and the
ATTENUATION.

¾ Using the rotary knob or t he cursor keys, select the

appropriate param eter from the submenu and pr ess

the ENTER key.
¾ Enter the value (e. g. velocity factor) for the cable

used.
¾ Confirm the entry with the ENTER key.

1145.5973.12 2.15 E-6

Measurements on CW Signals R&S FSH3

Please refer to the cab le manufacturer's data sheet for the velocity factor ( = speed of the wave in the
cable relative to the speed of light) and the attenuation of the cable per meter or per foot at the specified
frequency.

¾ Use the EXIT softkey to exit the menu for defining the cable model.
The analyzer returns to the DTF measur ement menu and d isplays the cab le used f or the measurem ent

in the top right-hand corner of the screen.
The R&S FSH3 uses the cable length to determine the optimal span for the measurement and for

scaling the x-axis in DT F mode. For best res ults the cable should be spec ified 20 to 50 % longer than
the actual cable length.

¾ Press the CABLE LENGTH softkey.
The R&S F SH3 opens the cable lengt h (CABLE LEN)

value entry box and displays the current length setting.
¾ Using the number keys, enter the cable length in

meters and terminate the entry with the ENTER key

or one of the unit keys, or
¾ Using the Rotary knob (1 m steps) or the Cursor

keys (10 m steps) adjust the cable length.
If the unit of length is s et to Feet (via SETUP: LOC AL

SETTINGS), the entry is in "Feet".
The minimum cable length is 3 m. The maximum

settable cable length is 1000 m.

N.B.: The cable length should always be entered before the test setup is calibrated. If it is

entered afterwards, the measurement accuracy is reduced.

1145.5973.12 2.16 E-6

R&S FSH3 Measurements on CW Signals

Calibrating the test setup:

The test setup must be calibrated before any measurements are performed.
¾ Press the DTF CAL softkey.

The R&S FSH3 opens a text window which prompts
the user to terminate the measurement cable with a
SHORT.

¾ Firmly screw the SHORT to the output end of the

measurement cable.
¾ Press the CONTINUE softkey to start the SHORT

calibration.
While SHORT calibration is in progress, the

R&S FSH3 out puts the message "Calibrating SHORT,
please wait...".

When calibration is over, the R&S FSH3 displays DTF CAL in the top right-hand corner of the screen.
Hint to the calibration:

The R&S FSH3 performs the calibratio n for its whole f requency range. Theref ore, a new calibration is
not necessary after changing the cable length. The calibration data are stored in the R&S FSH3
memory. That way the cali bration is valid after change of the operating m ode or after switching off the
instrument. Precondition for a valid calibration is, that the instrument temperature does not change
more than 5 °C after calibr ation. In case of a higher tem perature change the R&S FSH3 shows a red

dot in front of the • DTF display . A new calibration is recommended, then.

¾ Unscrew the short from the measurement cable.
¾ Screw the cable under test to the measurement cable.

The R&S FSH3 displays the reflections produced in the cable under test vs the distance.
The R&S FSH3 can also list any cable faults. It displays the return loss and distance from the

measurement plane of all reflections that exceed a settable threshold.
¾ Press the LIST VIEW softkey.

The R&S FSH3 opens the threshold value entry box
and also displays the threshold as a horizontal line
across the measurement diagram.

¾ Set the threshold using the Cursor keys (5 dB

steps), the Rotary knob (1 dB steps) or the number

keys.

1145.5973.12 2.17 E-6

Measurements on CW Signals R&S FSH3

¾ Press the ENTER key or the LIST VIEW softkey

again.
The R&S FSH3 displays a table listing all the

reflections that are above the threshold sorted
according to distance from the measurement plane.

¾ T o close the lis t and to retu rn to the gr aphics disp la y

mode, press the EXIT softkey.

The distance to the cable faults or the distance between an y two faults can also be read out with the
marker.

¾ Press the MARKER key.
The R&S FSH3 opens the marker menu and places

the distance marker on the largest reflection. The
marker readout gives the distance of the reflection
from the measurem ent plane in meters and its return
loss.

¾ Change the distance marker b y entering a number,

adjusting the Rotary knob (pixel by pixel) or b y us i ng

the Cursor keys (step = 10 % of the span).

For higher fault reso lution, the R&S FSH3 offers a zoom function in the position of the mark er. The x
axis of the display can be extended up to a span of 3 m.

¾ Press the MARKER MODE softkey.
¾ Using the rotary knob or the cursor keys, select

ZOOM ON from the menu.
¾ Conf ir m your selection with the ENTER key.
The entry field for the zoom factor is displayed while

the R&S FSH3 simultaneous ly expands the x axis by a
factor of 2.

¾ Use the Rotary knob or the Cursor keys to set the

zoom factor to the value you want.
The screenshot on th e right shows that t he fault of the

measured cable c onsists of two transitions. A coupling
of approx. 7 cm length was used to connect two
cables.

Disable the zoom function as follows:

¾ Pr ess the MARK ER MOD E softk e y in the MARKER menu.
¾ Using the rotary knob or the cursor keys, select ZOOM OFF from the menu.
¾ Confirm your selection by pressing the ENTER key or by pressing the MARKER MODE softkey

again.

1145.5973.12 2.18 E-6

R&S FSH3 Measurements on CW Signals

Checking the return loss of the cable under test:

¾ Press the MEAS MODE softkey.
¾ Select REFLECTION using the Rotary knob or the Cursor keys.
¾ Confirm your selection by pressing the MEAS MODE softkey again or by pressing the ENTER key.

The R&S FSH3 measures the return loss over the
frequency range which has been selected for the
distance-to-fault cable measurement.

To indicate that the R&S FSH3 is measuring return
loss, DT F refl. cal is displayed in the top right- hand
corner of the screen.

Checking the spectrum in the frequency range for detecting external interferers:

¾ Press the MEAS MODE softkey.
¾ Select SPECTRUM using the Rotary knob or the Cursor keys.
¾ Confirm your selection by pressing the MEAS MODE softkey again or by pressing the ENTER key.

The R&S FSH3 turns off the tracking generator and
displays the spectrum over the fr equency range of th e
DTF measurement.

To indicate that the R&S FSH3 is in the spectrum
mode, DTF Spectrum is displayed in the top right­hand corner of the scr een. Otherwise, the R&S FSH3
uses exactly the same settings as it did for DTF
measurements.

1145.5973.12 2.19 E-6

Saving and Recalling Settings and Test Results R&S FSH3

Saving and Recalling Settings and Test Results

Instrument settings and results can be saved to the R&S FSH3’s internal CMOS RAM. Results and
settings are always stored t oget her s o that when res u lt s are r ec alled , they can be interpreted in c ontext.
The R&S FSH3 can store a maximum of 100 data sets, each with a unique name.

Saving Measurement Results

¾ Press the SAVE / PRINT key.
¾ Press the SAVE softkey.

An input box opens and the user is prompted to enter a
name for the data set to be saved.

It suggests the name for mos t recently stored data set
in the 'Name:' entry box which is highlighted in red.
When you press the ENT ER key or the SAVE softkey
a second time, the data set is saved under the
suggested name.

By pressing the BACK k ey the R&S FSH3 browses through t he list of names of the alrea dy stored data
sets and shows them with the 1

st

available free exten sion. That way the nam e of the data set recalled

for a specific measurement can be selected for storage of the measurement data.
A new name can be entered via the numeric keypad. The numeric keypad has the same letter

assignment as mobile-phone keypads. Enter the letter above the key by pressing the key the
appropriate number of times.

The number of free memory locations is also displayed.

¾ Enter a name for the data set using the numeric keypad.
¾ Confirm with ENTER.

The data set is saved to the R&S FSH3’s internal memory under the specified name.

1145.5973.12 2.20 E-6

R&S FSH3 Saving and Recalling Settings and Test Results

Saving Calibration Data

When performing scalar transmission or reflection measurements, the R&S FSH3 can store the
calibration data alo ng with the s ettings a nd results. Saving the s ettings a nd result s with calibrat ion dat a
requires twice as m uch mem ory space as witho ut it. This, of course, red uces the m aximum number of
data sets that can be saved.

In the default state, calibration data storage is disabled.

¾ Press the SETUP key.
¾ Press the GENERAL softkey.
¾ Select SAVE CAL DATA... and confirm your

selection by pressing the ENTER key or the

GENERAL softkey.
¾ Using the rotary knob or the cursor k eys, select ON

or OFF.
¾ Confirm with ENTER.

The state of calibration data saving is entered in the SETUP menu.
When recalling data sets w ith calibration data i ncluded the R&S FSH3 check s, if the current instrum ent

temperature corresponds to the instrument temperature at the time of calibrat ion. If it deviates more
than 5 °C the R&S FSH3 outputs a red dot in front of the • T ransmission or • Reflection display. A
new calibration is recommended, then.

1145.5973.12 2.21 E-6

Saving and Recalling Settings and Test Results R&S FSH3

Recalling Measurement Results

Use the R&S FSH3’s recall function to review previously saved measurement results and settings.

¾ Press the SAVE / PRINT key.
¾ Press the RECALL softkey.

A list of all saved data sets opens. The red selection
bar marks the last data set to be saved.

¾ Select a data set from the list using the Rotary knob.
¾ Confirm your selection by pressing the RECALL

softkey.
The selected data s et is displayed on the scr een, but

the R&S FSH3 is not set to the set tings i n the da ta set .
This gives you the opportunity to check the data set
before its settings are activated.

The name of the selected data set is displayed at the
bottom left of the screen.
Using the Rotary knob or the Cursor keys, you can
scroll through all t he available data sets. The settings
and results for each data set are displayed.

You now have the following options :
¾ Press the STATUS key to see all the instrument

settings in the selected data set. When you press

the STATUS key again, the R&S FSH3 returns to

the graphics display.

¾ Press the ACTIVATE softkey to load the data set.
¾ Press the EXIT softkey to display the list of data sets

again. Press EXIT a second time and the

R&S FSH3 returns to its previous settings.
¾ Press the P RINT softk ey to send the d isplayed data

set to a printer.

Pressing the ACTIVATE softkey transfers the stored trace to the R&S FSH3's trace memory. The
current trace can be compared with the stored one by switching on the trace memory.

¾ Press the TRACE key.
¾ Press the SHOW MEMORY softkey.

The R&S FSH3 displays the stored trace in white and the current trace in yellow.

N.B.: The trace is in the R&S FSH3's trace memory. The level and frequency values are

displayed correctly only if neither the instrument's frequency setting nor its level setting
have been changed.

1145.5973.12 2.22 E-6

R&S FSH3 Printing Out Measurement Results

1145.5973.12 2.23 E-6

Printing Out Measurement Results

The R&S FSH3 can print out screen shots to a printer equipped with a serial interface. The type of
printer and the baud rate of the serial interface are set in the setup menu (SETUP key) using the
GENERAL softkey and the 'PRINT ER BAUD...' and 'PRINT ER TYPE...' m enu items . For printers with a
parallel interface a serial/parallel converter (R&S FSH-Z22) is available.

Printer with serial interface:

¾ Connect the printer to the optical interface using the RS232 optical interface cable.

Printer with parallel interface:

¾ Connect the RS232 optical interface cable to Serial/Parallel Converter R&S FSH-Z22.
¾ Connect the R&S FSH-Z22 parallel interface to the printer.
¾ Switch on the Serial/Parallel Converter R&S FSH-Z22

Operating the R&S FSH3:

¾ Press the SAVE / PRINT key.
The SAVE/PRINT m enu with the option fo r printing out

a screen shot to a printer opens.
¾ Press the SCREEN->PRINTER softkey.

The R&S FSH3 starts printing out the scr een shot to a
printer.

R&S FSH3 Screen Layout

3 Operation

Screen Layout

Screen layout for spectrum-mode measurements without markers

Trace

Softkey labelling

Battery charge-level

indicator

X-axis scale

Level-axis

scale

Reference
level display

Detector
display

Value entry box

Status

message

Invalid-trace symbol

Grid

Display of
resolution bandwidth (RBW),

video bandwidth (VBW) and

sweep time (SWT)

Parameter

uncoupled

Trigger

display

Trace mode
display

1145.5973.12 3.1 E-6

Screen Layout R&S FSH3

Screen layout when the marker mode is selected

Softkey function on

Softkey activated
for entry

Softkey menu

Selected

menu item

Delta marker

Marker

Display:
Setting not coupled

Marker-value
readout

The colour of the softkey labelling and its background indicate the status of the softkey function in
question:

Softkey colour Meaning

Blue background, white labelling Softkey function is turned off
Blue background, grey labelling In the current setting, this softkey function is not available
Green background Softkey function is turned on
Red background Softkey function has been activated for value entry or selecting a menu

function

1145.5973.12 3.2 E-6

R&S FSH3 Entering Measurement Parameters

Entering Measurement Parameters

Settings and texts are ent ered either by direc t l y call ing the f unc tio ns or by entering values , u nits or t ex ts
separately. The R&S FSH3 has a variety of operating modes.

Alphanumeric
keypad

BACK key

CANCEL key

ENTER key

Cursor keys

Unit keys

Rotary knob

Entering values and texts

Values are entered using the number ke ys (0 to 9), the decimal point key (.) and the minus key (-) in the
alphanumeric k eypad. The alphanumeric keypad is also used to enter letters , e.g. file names for data
sets. If the R&S FSH3 is expecting a letter entry, it a utomatically assigns the letters above the ke ys to
the keys in the alphanumeric keypad. The keys have multiple assignments. The letter you want is
obtained by pressing the key the appropriate number of times. The key assignments are listed below:

Key x1 x2 x3 x4 x5 x6 x7 x8 x9

1

1

2

a b c 2 A B C

3

d e f 3 D E F

4

g h i 4 G H I

5

j k l 5 J K L

6

m n o 6 M N O

7

p q r s 7 P Q R S

8

t u v 8 T U V

9

w x y z 9 W X Y Z

-

-

0

0 SPC _

.

.

You can delete any letter or digit you ha ve entered with the BAC K key. Press ing the BACK k ey deletes
the last keystroke that has been entered. Complete entries can be cancelled with the CANCEL key.

Values can also be enter ed with th e Rotar y knob or th e Curs or k eys. The entr y is change d in ste ps and
the R&S FSH3 immediately sets the appropriate entry parameter.

1145.5973.12 3.3 E-6

Entering Measurement Parameters R&S FSH3

Entering units

To enter a unit for a value entr y, terminate the entry with a u nit key. Use the unit ke ys down the right­hand side of the alphanum eric keypad. These keys have multiple as signments which depend on the
unit entry expected by the R&S FSH3.

GHz, -dBm, V, s

MHz, dBm, dBmV, mV, ms

kHz, dBµV, µV, µs

kHz, nV, ns

The relative unit dB can be entered with any of the unit keys.

1145.5973.12 3.4 E-6

R&S FSH3 Menu Overview

Menu Overview

Frequency entry

CENTER

FREQ

FREQ

CF

STEPSIZE

START

FREQ

STOP

FREQ

FREQ

OFFSET

0.1 x SPAN
=CENTER
MANUAL...

Frequency span entry

SPAN

MANUAL

SPAN

FULL

SPAN

ZERO
SPAN

LAST

SPAN

Level entry

AMPT

REF

RANGE

UNIT

REF

OFFSET

RF

INPUT

10 dB/DIV
5 dB/DIV
2 dB/DIV
1 dB/DIV
LIN 0 - 100%
VSWR 1-6

1)

VSWR 1-2

1)

VSWR 1-1.5

1,2)

VSWR 1-1.2

1,2)

dBm
dBmV
dBµV
V
W

50 Ω
75 Ω

1)

Only models 1145.5850.13 and 1145.5850.23

2)

Only with option R&S FSH-K2

Bandwidth entry

MANUAL
RES BW

BW

AUTO

RES BW

MANUAL

VIDEO BW

AUTO

VIDEO BW

1145.5973.12 3.5 E-6

Menu Overview R&S FSH3

Sweep entry

SWEEP

MANUAL

SWPTIME

AUTO

SWPTIME

CONT

SWEEP

SINGLE
SWEEP

TRIGGER

FREE RUN
VIDEO...
EXTERN
EXTERN
DELAY...

Trace settings

TRACE

TRACE

MODE

TRACE->

MEMORY

SHOW

MEMORY

DETECTOR

AUTO PEAK
MIN PEAK
MAX PEAK
SAMPLE
RMS

CLEAR/WRITE
AVERAGE
MIN HOLD
MAX HOLD
VIEW

1145.5973.12 3.6 E-6

R&S FSH3 Menu Overview

Measurement functions

MEASUREMEAS

TRANS

DUCER

LIMIT

LINES

DISPLAY

LINE

ANALYZER
TRACKING GEN
POWER SENSOR
CHANNEL POWER
OCCUPIED BW
TDMA POWER
DISTANCE TO FAULT

FREQ UNIT ZERO -> REF TIME

STANDARD

LEVEL

ADJUST

CHANNELBWOBW DISP

ON/OFF

USER
3GPP WCDMA
CDMAONE
CDMA2000 1x

STANDARD

LEVEL

ADJUST

MEAS

TIME

PWR DISP

ON/OFF

USER
GSM/EDGE

CABLE
MODEL

CABLE

LENGTH

MEAS
MODE

DTF
CAL

LIST

VIEW

DISTANCE TO FAULT
REFLECTION
SPECTRUM

TRANSM

CAL

REFLECT

CAL

TRANSM

VECT CAL

REFLECT

VECT CAL

OUTPUT

LEVEL

SELECT EXIT

LIST ->

PRINTER

THRES

HOLD

LIST ->

PRINTER

EXIT

MANUAL

SWPTIME

Option

FSH-K2

STANDARD

LEVEL

ADJUST

PWR UNIT

CHANNELBWPWR DISP

ON/OFF

USER
3GPP WCDMA
CDMAONE
CDMA2000 1x

dBm
dBmV
dBµV

Option

FSH-K2

1145.5850.23
only

1145.5973.12 3.7 E-6

Menu Overview R&S FSH3

MEASURE

MEAS

TRANS
DUCER

LIMIT

LINES

DISPLAY

LINE

TRANSD

TRANSD

dB

EXIT

TRD'S

OFF

UPPER

LIMIT

LOWER

LIMIT

EXIT

LIMITS

OFF

OPTIONS

SELECT

LIMIT

OFF

EXIT

LIST ->

PRINTER

MEASURE

MEAS

TRANS

DUCER

LIMIT

LINES

DISPLAY

LINE

BEEP...
MESSAGE...

SELECT

TRANSD

OFF

EXIT

LIST ->

PRINTER

Markers

Analyzer mode:

MARKER

MARKER

DELTA

MARKER

SET

MARKER

MARKER

MODE

MARKER

DEMOD

OFF
AM
FM
TIME...
VOLUME...

NORMAL
NOISE
FREQ COUNT
MULTIMARKER

PEAK
NEXT PEAK
MINIMUM
CENTER = MRK FREQ

REF LVL = MRK LVL

ALL MKR TO PEAK

Analyzer mode, multimarker switched on:

MARKER

MARKER

DELTA

MARKER

SET

MARKER

MARKER

MODE

MKR LIST

VIEW

NORMAL
NOISE
FREQ COUNT
MULTIMARKER

M1: PEAK
M1: NEXT PEAK
M1: MINIMUM
CENTER = M1 FREQ

REF LVL = M1 LVL
ALL MKR TO PEAK

MARKER 1
MARKER 2

MARKER 3
MARKER 4
MARKER 5
MARKER 6

ALL MARKERS ON
ALL MARKERS OFF

DELTA 2
DELTA 3
DELTA 4
DELTA 5
DELTA 6

ALL DELTAS ON
ALL DELTAS OFF

1145.5973.12 3.8 E-6

R&S FSH3 Menu Overview

Distance-to-fault mode (option R&S FSH-B1):

DISTANCE

MARKER

MARKER

MARKER

OFFSET

SET

MARKER

MARKER

MODE

MKR LIST

VÎEW

1)

PEAK
NEXT PEAK
MINIMUM

CENTER = MRK FREQ
REF LVL = MRK LVL

ALL MKR TO PEAK

NORMAL

NOISE
FREQ COUNT

MULTI MARKER
ZOOM ON

ZOOM OFF

1)

Only with multimarker switched on

Distance-to-fault mode (option R&S FSH-B1), multimarker switched on:

DISTANCE

MARKER

MARKER

MARKER

OFFSET

SET

MARKER

MARKER

MODE

MKR LIST

VIEW

D1: PEAK
D1: NEXT PEAK
D1: MINIMUM

CENTER = MRK FREQ
REF LVL = MRK LVL

ALL MKR TO PEAK

NORMAL

NOISE
FREQ COUNT

MULTI MARKER
ZOOM ON

ZOOM OFF

MARKER 1
MARKER 2
MARKER 3
MARKER 4
MARKER 5
MARKER 6

ALL MARKERS ON
ALL MARKERS OFF

1145.5973.12 3.9 E-6

Menu Overview R&S FSH3

1145.5973.12 3.10 E-6

Save and print menu

SAVE/
PRINT

{Data Set Name}

EXIT

ACTIVATE

SCREEN->

PRINTER

SAVE

DELETE

RECALL

SCREEN->

PRINTER

DELETE

ALL

DELETE

EXIT

RECALL

LIST ->

PRINTER

Instrument setup

GENERALSETUP DISPLAY

HARDWARE

SETTINGS

LOCAL

SETTINGS

SETUP ->

PRINTER

POWER DOWN...
DATE...
TIME...
PRINTER BAUD...
PRINTER TYPE...
PIN CODE...
OPTIONS ...
FACTORY

CONTRAST...
LIGHT...

POWER DOWN

5 min.

30 min.

DISABLE

LANGUAGE...
DATE FORMAT...
UNIT OF LENGTH...

UNIT OF LENGTH
METER
FEET

LANGUAGE
ENGLISH
FRENCH
GERMAN
SPANISH
ITALIAN
PORTUGUESE
JAPANESE

CHINESE
KOREAN

PRINTER BAUDRATE

1200 Baud
2400 Baud

9600 Baud
19200 Baud
38400 Baud
57600 Baud

115200 Baud

PRINTER
DESKJET
LASERJET
EPSON FX
POSTSCRIPT

PINCODE
PINCODE OFF
PINCODE ON
NEW PINCODE...

DATE FORMAT
dd/mm/yyyy
mm/dd/yyyy

PREAMP... *)
EXT REF
EXT TRIG

*) Model 1145.5850.23 only

Status display

STATUS

EXIT

STATUS ->

PRINTER

R&S FSH3 Instrument Default Setup

4 Instrument Functions

Instrument Default Setup

When you press the PRESET key, the R&S FSH3 is set to its default setup or presets. It is best to
select the PRESET when you are going to perform a new meas urement task. The new settings can
then be made on the basis of the more familiar default setup without the old settings affecting the
measurement.

Operating sequence:

¾ Press the PRESET key (green key below and to the right of the rotary knob).
The R&S FSH3 is immediately set to the default setup.

Status Display

The R&S FSH3 has a status display. On the sc reen, the status displa y provides an overvie w of all the
measurement parameters that have just been s et. T his m eans that all th e measurement settings c an b e
checked easily at a glance. The status display can be output directly to a printer as measurement
documentation. At a later date, every detail of a measurement can, therefore, be accurately reproduced.

Operating sequence:

¾ Press the STATUS key (above and to the right of the rotary knob).
The R&S FSH3 displays the current measurement

parameter settings o n the screen. To view a ll settings,
the screen content can be scrolled through with the ai d
of the cursor ke ys or the rotary knob. An up or down
arrow at the right screen edge i ndicates that addition al
information is available before or after the displayed
window. The display can be use d as a way of checking
the settings. Settings can be changed by using the
appropriate key and menu.

Printing out the status display:
¾ Press the STATUS -> PRINTER softkey.

The R&S FSH3 immediately prints out a screensh ot to
the connected printer. The softkey remains active for
about ½ second (red highlighting).

Exiting the status display:
¾ Press the EXIT softkey or the STATUS key.

The R&S FSH3 returns to the original setting.

1145.5973.12 4.1 E-6

Setting the Frequency R&S FSH3

Setting the Frequency

The R&S FSH3's frequency is set with the FREQ k ey. The frequency can be spec ified in terms of the
center frequency (center freq. = frequency at the center of the frequency axis in the measurement
diagram) or the start and stop frequency for a particular span.

It is best to enter the ce nter frequency when a sign al is to be measured at a k nown frequency. W hen
you are investigating signals, e.g. harmonics, that are within a particular frequency range, the best
option is entering a start and stop frequency to define the span.

Entering the center frequency

¾ Press the FREQ key.
The R&S FSH3 opens the frequency menu. Center frequency entry is always activated, so that the

frequency settings can be m ade with the minim um num ber of ke ystrokes. The cur rent center f requenc y
is displayed in the value e ntry box. A new cent er frequency can be en tered directly from the numerical
keypad. You can also use the rotary knob or the cursor keys.

¾ Enter the frequency you want from the numerical

keypad and terminate the f requency entry with the
appropriate unit (GHz, MHz, kHz or Hz).

The frequency you have entered now becomes the
new center frequency. The value entry box remains
open for any further entries.

¾ As an alternative, you can change the center

frequency with the rotar y knob or the cursor keys
and terminate the entry with the ENTER key.

¾ You can clear the value entry box f rom the screen

by pressing the CANCEL key.

The smallest ste p for adjusting th e center freque ncy with the rotar y knob is a pixel, in other words, as
the trace compris es about 300 pixels , each s tep is eq ual to about 1/300 of th e s pan. When you use the
cursor keys, a frequency step is equal to 10 % of the span (= 1 grid division). If you want to use a
different step size, you can define it with the CF STEPSIZE function (CF = center frequency).

When you are adjusti ng the center f requency, you ma y obtain a value that is outside the R &S FSH3’s
maximum span. If this happens, the R&S FSH3 automatically reduces the span. It also outputs the
message "Span changed" to inform the user what has happened.

Setting a frequency offset

For measurements on f requency converters such as satellite downconverters, it is often convenient to
reference the results to the frequency prior to conversion. For this purpose, the R&S FSH3 offers a
frequency offset, which arithmetically shifts the center frequency to higher frequencies; thus, the
R&S FSH3 displays the input frequency of the DUT.

Frequency offset is possible in the 10 Hz to 100 GHz range, in 10 Hz steps.

1145.5973.12 4.2 E-6

R&S FSH3 Setting the Frequency

¾ Press the FREQ key.
¾ Press the FREQ OFFSET softkey.

The R&S FSH3 opens the frequency offset entry field.
¾ Enter the required frequency offset and terminate

with the corresponding unit.

The R&S FSH3 adds the frequency offset to the set
center frequency. The center frequency display is
marked by a red dot to indic ate that a frequency off set
has been set.

The frequency offset can be reversed if an offset of
0 Hz is entered.

Entering the center-frequency stepsize

¾ Press the CF STEPSIZE key.
A submenu above the softkey label opens. The box contains various stepsize setting options.

With 0.1 x SPAN

(default setting), th e steps i ze is equ al

to 10 % of the span (= 1 division on the vertical scale).
With = CENTER,

the stepsize is equal to center
frequency. This setting is ideal for measurements on
harmonics. On each frequency increment, the center
frequency moves to the next harmonic.

With MANUAL...

you can select any stepsize. This
makes it easy to investigate spectra with frequencies
at constant intervals.

¾ Mak e the selection you want with the rotary knob

or the cursor keys and term inate with the ENTER
key.

If you select "0.1 x SPAN" or "= CENTER", the R&S FSH3 makes the setting directly itself. If you select
"MANUAL...", the value entry box opens and indicates the current stepsize.

¾ Using the rotary knob, the cursor keys or numerical entry, change the stepsize.
¾ When you have entered the s tepsize you want, confir m by pressing the ENT ER ke y or by pressing

the CF STEPSIZE softkey.

1145.5973.12 4.3 E-6

Setting the Frequency R&S FSH3

Entering the start and stop frequency

¾ Press the START FREQ softkey.
The value entry box for the start frequency opens. The box displays the current frequency.

¾ Enter a new start fr equency wit h the num ber ke ys and terminate the entr y with one of the unit k eys

or

¾ Adjust the start frequenc y with the rotar y knob or the cursor keys and terminate the entry with the

ENTER key.

The R&S FSH3 sets the new st art f requenc y. The x ax is la belling c han ges f rom CENTER an d SP AN to
START and STOP.

¾ Press the STOP FREQ softkey.
The R&S FSH3 opens the value entry box for the stop frequency. The box indicates the current

frequency.
¾ Enter a new stop frequency using the number keys and term inate the entry with one of the unit

keys, or

¾ Adjust the stop frequency with the rotar y knob or the cursor keys and term inate the entry with the

ENTER key.
The new stop frequency is now set on the R&S FSH3.
If you enter a stop fr equency which is gr eater than 3 GHz, or you reach the 3 GHz limit with the rotary

knob or the cursor keys, the R&S FSH3 outputs the message "Maximum reached".

1145.5973.12 4.4 E-6

R&S FSH3 Setting the Span

Setting the Span

The span is the frequenc y range centered on the cent er frequenc y which a spectrum analyzer displa ys
on the screen. What span should be s elect ed for a par ticular m eas urement depen ds on the s ignal to b e
investigated. A rule of thumb is that it should be at least twice the bandwidth occupied by the signal.

For frequency dom ain measurement the R&S FSH3 has a minimum span of 10 kHz an d a maximum
span of 3 GHz. Using the span 0 Hz measurement is performed in time domain.

Operating sequence:

¾ Press the SPAN key.
When the SPAN key is pressed, the R&S FSH3

automatically activates the MANUAL SPAN softkey
and indicates the c urrent valu e so that a new s pan c an
be entered immediately. If another function in the
SPAN menu has been used beforehand, press the
MANUAL SPAN softkey to enter the span.

¾ Enter a new span with the number keys and

terminate the entry with th e appropriate unit (GH z,

MHz, kHz or Hz), or
¾ Change the s pan with the rotary knob or the cur s or

keys. The span is set imm ediatel y after the chang e

is made.
¾ The value entry box can be cleared from the

screen with the CANCEL key.

Use the FULL SPAN softkey to select the full span from 0 Hz to 3 GHz with a single keystroke.
¾ Press the FULL SPAN key.

The R&S FSH3 displays the spectrum over the full span which extends to 3 GHz
(CENTER = 1.5 GHz, SPAN = 3 GHz).

The R&S FSH3 has a LAST SPAN softke y so that you can toggle bet ween span settings with just one
keystroke.

¾ Press the LAST SPAN key.
The span that was set immediately before the current span is restored.

The ZERO SPAN softk ey sets the span to 0 Hz. The R&S FSH3 measures the signal lev el only at the
center frequency that has been set. As a s pectrum c annot be dis pla yed when m eas urem ents ar e made
at a single frequenc y, the display mode sw itches to the time dom ain. The x axis of the m easurement
diagram becom es the time axis and le vel is plotted agains t time. The displa y always starts at 0 s and
stops after the sweep time that has been set (set with the SWEEP key, see also "Setting the Sweep").

1145.5973.12 4.5 E-6

Setting the Amplitude Parameters R&S FSH3

Setting the Amplitude Parameters

All R&S FSH3 settings referred to the level display are made with the AMPT key.
The reference level (REF) is the level represented by the uppermost grid line in the measurement

diagram. The input signal gain up to t he display stage is s et with the reference level. If the reference
level is low, the gain is high, which means th at even weak signals are clearl y displayed. If the input
signals are strong , a high reference leve l must be set to preven t the analyzer signal path f rom being
overdriven and to k eep the signal dis play within the display range. W hen displaying the s pectrum of a
composite signal, the r eference level should b e at least high enough to ens ure that all the signals are
within the measurement diagram.

The RF attenuation setting at the inpu t of the R&S FSH3 is directl y couple d to the r efer ence level. If the
reference level is high, RF attenuat ion is switc hed on in s teps of 10 dB according to the f ollowing tab le
so that the input mixer always remains in the linear range.

Reference level RF attenuation

≤ -10 dBm

0 dB

-9 dBm to 0 dBm 10 dB

1 dBm to 10 dBm 20 dB

11 dBm to 20 dBm 30 dB

In model 1145.5850.23, the preamplifier, if switched on, is also coupled to the reference level setting.

Preamplifier

OFF

Preamplifier

ON

Reference level

RF attenuation RF attenuation Preamplifier

≤ -25 dBm

0 dB 0 dB On

-24 dBm to -15 dBm 0 dB 10 dB On

-14 dBm to -10 dBm 0 dB 0 dB Off

-9 dBm to 0 dBm 10 dB 10 dB Off
1 dBm to 10 dBm 20 dB 20 dB Off
11 dBm to 20 dBm 30 dB 30 dB Off

The status of the RF attenuation and the preamplif ier can be queried in the Status m enu (press the
STATUS key).

The reference level is in dBm for the default setting. However, the units dBmV, dBµV, Watt and Volt can
also be selecte d. Unit selec tion is of mo st relevance to th e marker leve l display as the marker leve l is
displayed in the unit of the reference level.

A reference off set (REF O FFSET ) can b e define d for the referenc e lev el. T he referenc e off set is a way
of increasing the referenc e level by a certain amount. This is usef ul if, for example, an attenuator or
amplifier has been i nserted before the RF input. The R&S FSH3 automatically tak es the loss or gain
into account when the level is displayed and no manual calculations are necessary. A loss introduced at
the RF input must be entered as a positive number and a gain as a negative number.

The measurement range ( RANGE) determines the r esolution along the lev el axis in the measurem ent
diagram. W hen the PRESET or default setting has been s elected, the level axis is scaled in dB. The
measurement range is 100 dB or 10 dB per division (10 dB/DIV). The R&S FSH3 also provides the level
ranges 50 dB (5 dB/DIV), 20 dB (2 dB/DIV) and 10 dB (1 dB/DIV) which enhance res olution along the
level axis. Howev er, increasing reso lution does not in crease the accurac y of, for example, t he marker
level readout, but only makes it easi er to read values of f the trace. You can al so select a linear lev el
scale with LIN 0-100 %. The level is expres sed as a percentage ( 0 % to 100 %) of the reference lev el.

1145.5973.12 4.6 E-6

R&S FSH3 Setting the Amplitude Parameters

This mode is usef ul if you want to displ ay, for exam ple, a car rier being am plitude modulat ed in the tim e
domain (SPAN = 0 Hz).

The R&S F SH3 can also handle m easurements on 75 Ω s ystems. The R&S F SH3 does not select a
75 Ω RF input per se, but instead only a 75 Ω matching pad connected at the RF input. The
50/75 Ω Matching Pad R&S RAZ is recomm ended for 75 Ω matching (see recommended acc essories).
The R&S FSH3 automatically considers the conversion factor when a value of 75 Ω is set. Other
matching pads such as the R&S RAM can be taken into account by using a transducer factor.

1145.5973.12 4.7 E-6

Setting the Amplitude Parameters R&S FSH3

Setting the reference level

¾ Press the AMPT key.
The reference leve l entry is activated imm ediately. The

REF LEVEL softkey label is highlighted in red.
¾ Enter a reference level with the number keys and

either terminate the e ntry with one of the un it keys

(-dBm or dBm for relativ e measurements or (), m,

µ, n for absolute measurements) or press the

ENTER key, or
¾ Adjust the reference level with the rotary knob or

the cursor keys.
Any changes you m ake to the reference level wit h the

rotary knob or the cursor keys are immediate. The
trace moves as changes to the reference level are
made.

¾ When the reference level you want has been set ,

you can remove the value entry box from the

screen by pressing the CANCEL key.

Entering the display range

¾ Press the AMPT key.
¾ Press the RANGE softkey.

A submenu opens. T he various opti ons for scaling th e
level axis are displayed.

¾ Using the rotary knob or the curs or k e ys, select th e

scaling option you want and confirm your selection

by pressing the ENTER key.
The scaling option you have c hosen is im m ediately set

on the R&S FSH3.
The menu items VSW R 1-6 and VSWR 1-2 are valid

scaling options only if the R&S FSH3 is fitted with a
tracking generator which is configured for reflection
measurements. If the R&S FSH-K2 option is installed,
the ranges VSWR 1- 1.5 and VSW R 1-1.1 are ava ilabl e
in addition.

1145.5973.12 4.8 E-6

R&S FSH3 Setting the Amplitude Parameters

Entering the display unit

¾ Press the AMPT key.
¾ Press the UNIT softkey.

A submenu opens. The various unit options for the
reference level are displayed.

¾ Using the rotary knob or the curs or k e ys, select th e

unit you want and confirm your selection by

pressing the ENTER key.
The reference level unit is immediately set on the

R&S FSH3.

Entering the reference offset

¾ Press the AMPT key.
¾ Press the REF OFFSET softkey.
¾ Using the number keys, enter a r ef er ence of fset and terminate t he entry with one of the u nit keys or

the ENTER key, or
¾ Change the reference level using the rotary knob or the cursor keys.
The reference offset unit is always dB – no matter what unit is used for the reference level.

To indicate that a non- zero reference offset has been
set, a red circle is placed before the reference level
readout.

Entering the input impedance

¾ Press the AMPT key.
¾ Press the RF INPUT softkey.

A submenu opens. The two input impedance options
“50 Ω” and “75 Ω” are displa yed.

¾ Select the input impedance you want using the

rotary knob or the cursor keys and confirm your

selection by pressing the ENTER k e y.

Note: If you have selected 75

Ω

, and do not
connect a matching pad to the RF input,
incorrect level readings will be obtained.

1145.5973.12 4.9 E-6

Setting the Bandwidths R&S FSH3

Setting the Bandwidths

A key feature of a spectrum analyzer is that it can display the frequency spectrum of a signal. The
resolution bandwidth determines how well a spectrum analyzer can separate adjacent frequencies.
Spectrum analyzer s us ual ly also have switcha bl e v ide o band wid ths . T he vi de o bandwidth is determined
by the cutoff frequenc y of the lowpass used to f ilter the video volta ge before it is displ ayed. The video
voltage is the spectrum analyzer term for the voltage produced when the IF signal which has been
band-limited by the resolution filter is envelope detected. The video voltage is smoothed by video
filtering to, sa y, reduce noi se on the trac e. Un lik e the r esolut ion band width, the video band width h as n o
effect on the resolving power of the spectrum analyzer.

Resolution bandwidth

The resolution bandwidth (RES BW) of a spectrum analyzer determines the frequency resolution of
spectrum measurements. A sine signal is displayed on the screen "through" the passband of the
selected resolution filter. Therefore, a suitably small resolution bandwidth is required if two or more
signals whose fr equencies are close to gether are t o be displa yed separatel y. The f requency dif ference
between two sinus oidal carriers , for example, can not be less than the selected res olution bandwidth if
the carriers are to be r esolved. W hich resolution band width is selected also has an ef fect on the nois e
displayed by the spectrum analyzer. If the bandwidth is small, the noise displayed drops. If the
bandwidth is reduced or inc reas ed b y a factor of 3, the noise disp la yed drops or g oes up b y 5 dB. If the
bandwidth is changed by a factor of 10, the displayed noise changes by 10 dB. Which resolution
bandwidth is selec ted also has an ef fect on the sweep spee d. If the true spectr um is to be displa yed,
the bandfilters that deter mine the r esolutio n bandwidt h m ust settle at all fr equenc ies of interest. Nar row
bandfilters take longer to settle than wide f ilters. This is why a longer s weep time m ust be selected for
narrow resolution ban dwidths. If the ba ndwidth is redu ced by a factor of 3 (e.g. from 10 kHz to 3 kHz),
the sweep time m ust be increased by a factor of 9. If the reduction factor is 10 (e.g. from 10 k Hz to
1 kHz) the sweep time must be increased by a factor of 100.

The R&S FSH3 has resolution bandwidths from 1 kHz to 1 MHz in a 1, 3, 10 sequence. Model

1145.5850.23 provides in addition the resolution bandwidths 100 Hz and 300 Hz. When the default
setting is selected, they are coupled to the span, i.e. if the span is reduced, a smaller resolution
bandwidth is autom atically set. This means that in many cases the resolution ba ndwidth does not ha ve
to be set separately – a higher frequency resolution is automatically set when the span is reduced.
All models offer a 200 kHz resolution bandwidth in addition. This bandwidth has to be selected
manually, i.e. it will no t be activated automaticall y in the AUTO RES BW mode (resolution b andwidth
coupled to span).

1145.5973.12 4.10 E-6

R&S FSH3 Setting the Bandwidths

Operating sequence:

¾ Press the BW key.
The menu for setting the bandwidth opens. If the

default setting is activated, the softkey label for
automatically setting the bandwidth is highlighted in
green.

¾ Press the MANUAL RES BW softkey
The softkey label is highlighted in red and the value

entry box for the res olutio n band width (RBW ) indic ates
the current bandwidth. To indicate that the resolution
bandwidth is not c o up led to the s pa n, a s mall red circle
is placed before the reso lut ion band width d ispla y in the
top right-hand corner of the screen.

¾ Enter the resolution bandwidth you want using the

number keys and terminate the entry with the
appropriate unit (MHz, kHz or Hz), or

¾ Change the r esolution bandwidth to t he value you

want using the rotary knob or the cursor keys.

Resolution bandwidth

uncoupled

Resolution bandwidth

display

Note: The 200 kHz resolution bandwidth has to be entered by means of the number keys.

When using the rotary knob or the cursor keys, the 200 kHz bandwidth will be skipped.

The box for entering the resolution bandwidth can be closed by pressing the CANCEL key.
¾ Press the AUTO RES BW softkey.

The resolution bandwid th is coupl ed to the s pan th at has been s et. T he AUT O RES BW sof tkey label is
highlighted in gree n to show that the coupled m ode has been selected. The red circ le in front of the
RBW readout disappears.

1145.5973.12 4.11 E-6

Setting the Bandwidths R&S FSH3

Video bandwidth

The video bandwidt h smoothes the trace by reducing noise. W hen the filtered IF signal is envelope­detected, an IF sine signal becomes a DC voltage in the video signal. If the sine signal is amplitude­modulated, a signa l whose fr equency is the s ame as t he AM frequ ency is produc ed in the video signal
apart from the DC vo ltage from the carrier. The Fig. b elow shows an RF s ignal modulated with a sine
signal and the corresponding video signal in the time domain.

AM RF signal

IF signal

Envelope signal

(video voltage)

DC voltage

from carrier

AC voltage

from modulation

Time

Time

Amplitude

Amplitude

The envelope signal con t ains a DC c omponent correspondin g to th e c arr ier le vel and an AC componen t
whose frequency is the s ame as the AM frequenc y. If the bandwidth of the video filter is less than the
frequency of the AC com ponent, the latter wil l be suppressed de pending on its m aximum frequenc y. If
the AM component is to be displayed faithfully, the cutoff frequency must be greater than the
modulation frequency.

If there is noise on the sine signal, the modulation signal can be thought of as noise. If the video
bandwidth is reduce d, the high-frequency noise com ponents above the cutoff frequenc y of the video
filter will be rejec ted . The smaller the vid eo b and wid th, the s maller the noise amplitude at the vide o f ilt er
output.

Therefore, the following rules of thumb can be applied to setting the video bandwidth:

• If you are perf orming m easurem ents on modulat ed signals , the video ba ndwidth m ust be suff icientl y
large so that wanted modulation components are not rejected (≥ RBW).

• If signals are to be kept free of noise, the smallest video bandwidth possible should be selected
(≤0.1 x RBW).

• If measurements are being performed on pulsed signals, the video bandwidth should be at least
three times greater than the resolution bandwidth so that the pulse edges are not distorted.

Like the resolution bandwidth, the video bandwidth has an effect on sweep speed. The spectrum
analyzer must pause before each measurement to allow the video filter to settle.

The R&S FSH3 has video bandwidths from 10 Hz to 3 MHz in a 1, 3, 10 s equence. When the def ault
settings are select ed, they are coupled to the res olution bandwidth. The video bandwidth equals the
resolution bandwidth. W hen the resolut ion bandwi dth is changed , the R&S FSH3 automatic ally sets the
appropriate video band wid t h. This means that, in many cases, the video ba nd wid th do es not nee d to b e
set separately. When the resolution bandwidth is changed, the video bandwidth is changed
automatically.

1145.5973.12 4.12 E-6

R&S FSH3 Setting the Bandwidths

Operating sequence:

¾ Press the BW key.
The menu for setting bandwidths opens. When the

default setting has been selected, th e softkey label f or
setting the bandwidth automatically is highlighted in
green.

¾ Press the MANUAL VIDEO BW softkey.
The softkey label is highlighted in red and the video

bandwidth value entr y box (VBW ) indicates the current
bandwidth. To indicat e that the video band width is not
coupled to the resolution bandwidth (RBW), a small,
red circle is plac ed befor e the video band width r eadou t
in the top right-hand corner of the screen.

¾ Enter the video bandwidth you want with the

number keys and terminate the entry with the
appropriate unit (MHz, kHz or Hz), or

¾ Change the video bandwidth to the value you want

using the rotary knob or the cursor keys.

The video bandwidth value entr y box is clos ed b y pres sing the ENTER key.
¾ Press the AUTO VIDEO BW softkey.

The video bandwidth is coupled to the resolution bandwidth that has been set. The AUTO VIDEO BW
softkey label is high lighted in green to indicate coup ling and the red circle marking the VBW readout
disappears.

1145.5973.12 4.13 E-6

Setting the Sweep R&S FSH3

Setting the Sweep

If the span is > 0, the sweep time is the time the spectrum analyzer takes to traverse the displayed span
to measure the spectr um. Certain b oundary cond itions m ust be met if a spurious spectrum is not to be
displayed.

One boundary con dition is the resolution band width. If the resolution filter is to settle, the dwell tim e
within the filter band width must have the rig ht value. If the sweep tim e is too short, the resolut ion filter
does not settle and the displayed level is too low (see also “Setting the Bandwidth”).

The second boundary cond ition is the selected span. I f the span is increas ed, the sweep time m ust be
increased proportionally.

The R&S FSH3 provides autom atic s weep tim e coupli ng to help user s set the s weep tim e b y coupling i t
to the resolution bandwidth and span that have been set. W hen automatic coupling (AUTO SWEEP
TIME) is selected, it always sets the shortest s weep time possible to ensure t hat sine signals in the
spectrum are displa yed correctly. When you quit the auto sweep time mode (MANUAL SW PTIME is
activated instead), a small, red circle is placed in front of the SWT readout to indicate that the
uncoupled mode has been selected. If the s wee p time is so short that le ve l er r ors oc cur , the R&S FSH3
informs the user by displaying a red circle on the right-hand side of the measurement diagram.

The R&S FSH3 requires a m inimum sweep tim e of 20 ms per 600 MHz of span. If a larger spa n is set,
the R&S FSH3 automatically adapts the m inimum sweep tim e in the coupled mode. F or the maximum
span of 3 GHz, a minimum sweep time of 100 ms is required.

If the span = 0 Hz, the R&S FSH3 displays video voltage v ersus tim e instead of a spectrum . The x axis
of the measurement diagra m becomes the time axis, star ting at 0 s and ending at the sweep time you
have selected.

The minimum sweep time when the span = 0 Hz is 1 ms, the maximum 1000 s.

Sweep tim e

¾ Press the SWEEP key.
The softkey menu for entering sweep parameters

opens. If the default settings have been selected,
automatic coupling (AUTO SWPTIME) is set. In this
mode, the sweep time is coupled to the resolution
bandwidth, the video bandwidth and the span.

¾ To enter the sweep time, press the MANUAL

SWPTIME softkey.

The SWEEP value entr y box opens and indicates the
current sweep time setting.

¾ Enter a new sweep t ime with the num ber k eys and

terminate the entry with one of the unit keys, or

¾ Change the sweep tim e with the rot ary knob or the

cursor keys.

Whenever a change is made, the sweep time is immediatel y set to its ne w va lue. The value entry box is
closed by pressing the ENTER key. The sweep time that has been set is displayed in the top right-hand
corner of the screen in the SWT readout box.

1145.5973.12 4.14 E-6

R&S FSH3 Setting the Sweep

Sweep mode

When the default s ett ings a re ac ti vat ed, the R& S FSH3 is in the cont inuous sweep mode, i.e. when one
sweep of the span has be en c om pleted, the s weep is autom atic ally repe ated f rom the s tart of the span.
The trace is refreshed after each sweep.

The continuous mode may not be needed for some applications, e.g. when a single event is to be
recorded on certain trigger conditions being met. The R&S FSH3, theref ore, has a SINGLE SWEEP
mode. When the single s weep mode is selected, the R&S FSH3 s weeps onc e o ver the s p an or disp lays
the time-domain vi deo signal once in the zero-span mode. The m easurement will only be repe ated if
you press the SINGLE SWEEP softkey.

¾ Press the SWEEP key.
If the default setting is selected, the CONT SWEEP

softkey label is highlight ed in green to indicate that the
continuous sweep mode has been set.

¾ Press the SINGL E SWEEP softkey.
The SINGLE SWEEP softkey label is highlighted in

green. The R&S FSH3 performs a single sweep and
waits for further entries.

¾ Press the CONT SWEEP softkey.
The R&S FSH3 now sweeps continuously again.

1145.5973.12 4.15 E-6

Setting the Sweep R&S FSH3

Trigger

To respond to events, the R&S FSH3 has a variety of trigger functions. The trigger can either be
external or generated internally.

• FREE RUN A new sweep starts on completion of the previous sweep. This is the

default setting for the R&S FSH3.

• VIDEO A sweep starts when the video voltage exceeds a settable value.

Video triggering is only available when span = 0 Hz. When a
frequency spectrum is being dis played, (s pan ≥ 10 kHz), there is no
guarantee that a signa l to generate a video volt age is present at the
start frequency. Under these circumstances, the R&S FSH3 would
never perform a sweep.

• EXTERN  and EXTERN  The sweep is started on the ris ing edge () or on the f alling edge ()

of an external trigg er signal. The exter nal trigger sign al is fed in via
the BNC connector EXT TRIGGER. The switching threshold is

1.4 V, i.e. a TTL signal level.

When a video trigger or an external trigger is s elected, the start of m easurement can be delayed wit h
respect to the trigger event by entering a delay (DELAY). In this way, time differences between the
trigger event and the measurement can be allowed for.

The current trigger setting is displayed centrally at the top of the screen
(e.g. Trig: Free).

Operating sequence:

¾ Press the SWEEP key.
¾ Press the TRIGGER softkey.

The submenu for setting the trigger opens. If the
default setting is selected, FREE RUN is highlighted in
red. If span = 0 Hz, any setting can be selected;
otherwise the settings VIDEO... and DELAY... are in
darker labelling to show that they are not available.

¾ Select the setting you want with the cur sor keys or

the rotary knob and terminate the entry with the
ENTER key or with the TRIGGER softkey.

The "Trig:" box at the center of the top of the screen
indicates the setting that has been selected.

If the VIDEO... trigg er setti ng h as be en s elec t ed, the t r igger le ve l and any trigger dela y ( DEL A Y...) must
be entered. The trigger level is expressed as a percentage (%) of the reference level. 100 % means that
the trigger level eq uals the ref erence level, 50 % that the trigger l evel is in the m iddle of the y ax is on
the measurement diagr am (default sett ing). The position of the video trigger on t he level axis is s hown
by a ">".

1145.5973.12 4.16 E-6

R&S FSH3 Setting the Sweep

¾ Change the vi deo-trigger threshold with the c ursor

keys or the rotary knob (0 to 100 %).

The trigger threshold is set immediately after entry.
¾ Terminate the trigger threshold entry with the

ENTER key or the TRIGGER softkey.

The value entry box is then closed.
¾ If a trigger delay is required, press the TRIG GER

softkey.

¾ Using the cursor keys or the rotary knob, select

DELAY... and confir m with the ENTER key or the
DELAY... softkey.

The delay value entry box is then opened.
¾ Using the number keys, the cursor keys or the

rotary knob, enter the delay and terminate the
entry with the ENTER key or the TRIGGER
softkey.

The trigger dela y range is 0 µs to 100 s. The resolut ion
is 10 µs up to 1 ms and 100 µs from 1 ms to 10 ms.

The trigger delay resolution depends on the delay selected. The table below lists the values:

Trigger delay (DELAY) Resolution

0 to 1 ms 10 µs
1 ms to 10 ms 100 µs
10 ms to 100 ms 1 ms
100 ms to 1 s 10 ms
1 s to 10 s 100 ms
10 s to 100 s 1 s

1145.5973.12 4.17 E-6

Trace Settings R&S FSH3

Trace Settings

The R&S FSH3 provides one measurement trace and a reference trace in memory.

Trace mode

A variety of display modes can be selected for the trace:

• CLEAR/WRITE The R&S FSH3 clears the old trace during a new sweep. This is

the default setting.

• AVERAGE The R&S FSH3 takes the level average over consecutive traces.

Averaging is on a pixel-by-pixel basis and is sliding over the ten
previous traces. T his r ed uces the ef fects of noise, for example, but
has no effect on sine signals. The average mode, therefore,
makes it easy to display sine signals in the vicinity of noise.

• MAX HOLD The trace indicat es the maximum value that has been m easured

up to that point in time. The Max Hold mode is only cancelled if
another setting is selected and the trace pixels from the new
setting cannot be com pared with the trace pixe ls fr om the previ ous
setting – for example if the span is change d. Interm ittent signals in
the spectrum or the maximum of fluctuating signals are easy to
find with MAX HOLD.

• MIN HOLD The trace indicates the m inim um value that has been m easur ed up

to that point in time. The Min Hold mode is only cancelled if
another setting is selected and the trace pixels from the new
setting cannot be com pared with the trace pixe ls fr om the previ ous
setting – for example if the span or the center frequency is
changed. With MIN HOLD, sine signals within the noise can be
highlighted or intermittent signals suppressed.

• VIEW The R&S FSH3 freezes the presently displayed trace. The
measurement is aborted. This, for instance, allows subsequent
evaluation of spectra with the aid of the marker.

1145.5973.12 4.18 E-6

R&S FSH3 Trace Settings

Operating sequence:

¾ Press the TRACE key.
¾ Press the TRACE MODE softkey.

The submenu for setting the trace mode opens.
¾ Using the cur s or keys or the rotary knob, se lect th e

trace mode you want an d confirm with the ENTER
key or the TRACE MODE softkey.

The "Trace:" display at the center of the top of the
display shows the trace mode that has been selected.

In the trace mode VIEW , the settings used f or measur ing the trace are dis played. T his ensur es that the
measurement conditions can be clearly specified in result documentation. In the status display
(STATUS key) it is indicated in brackets that the view mode is currently selected, e.g. Trace Mode:
Maximum Hold (View).

1145.5973.12 4.19 E-6

Trace Settings R&S FSH3

Detector

The detector processe s a spec tr um analyzer’s video volta ge before it is displa yed. The detector is pixel­oriented, i.e. it determines how the level at each pixel will be displayed. The R&S FSH3 always
measures the whole spectrum. However , the trace onl y has 301 pixels in the x direction for displa ying
results. If a large span is selected, all the spectrum information must somehow be repres ented using
only 301 points . Each pixel represents a frequenc y range equal to span/301. Four dif ferent detectors
are available:

• AUT O PEAK W hen the Auto Peak detec tor is selected , the R&S FSH3 displays
the maximum and m inimum level at each pixel for the frequency
range in question. This means that when Auto Peak detection is
selected no signals are lost. If the s ignal level f luctuates, as is the
case with noise, the width of the trace is a measure of signal
fluctuation. Auto-peak detection is the default setting.

• MAX PEAK Unlike the Auto Peak detector, the Max Peak detector only finds
the maximum value within the frequency range associated with
one trace pixel. Its use is recommended for measurements on
pulse-like signals or FM signals.

• MIN PEAK T he Min Peak detector yields the minimum valu e of the spectrum
within a pixel of the trace. Sine signals are d isplayed with correct
level but noise-lik e s ignals are suppr essed . T he Min P eak detector
can be used to highlight sine signals in the noise spectrum.

• SAMPLE The Sample detector does not “summarize” any aspect of the
spectrum which is a vailable in its com plete for m in the R&S FSH3,
but instead shows o nly one arbitrary measurem ent point within a
pixel. The Sample detector should always be used for
measurements with span = 0 Hz, as this is the only way of
correctly represent ing the timing of the video si gnal. The Sample
detector can also be used to measure noise power as noise
usually has a uniform spectrum with a normal amplitude
distribution. If the Sample detector is used for signal spectrum
measurements with a span that is greater than (resolution
bandwidth x 301), signals may be lost.

• RMS The RMS detector measures spectral power over a pixel. No
matter what the signal shape, power m easurem ents with the RM S
detector always give the true power. RMS detection is
recommended for power measurements on digitally modulated
signals in particular. T his is because the RMS det ector is the only
R&S FSH3 detector that can give stable, true power readings.
Display stability can easily be obtained by increasing the sweep
time, as the m easurement time for the power/pixel increases the
greater the sweep time. If you are making noise measurements,
for example, the trac e will be highl y stable if a long s weep time is
selected.

However, the bandwidth occupied by the signal to be measured
should at least equa l the fr equenc y covered b y a trac e pixel or the
selected resolutio n band width ( whiche ver is larg er). O ther wise, the
power shown by the R&S FSH3 is too low because there are
spectral components within the frequency range covered by the
pixel which do not c ome from the signal under m easurement (e.g.
noise).

1145.5973.12 4.20 E-6

R&S FSH3 Trace Settings

To obtain the true po wer, the video bandwidth (VBW ) too should
be selected to be greater than the resolution bandwidth (RBW).
Otherwise, an averaging effect caused by video bandlimiting
comes into play before the RMS value is calculated.

Operating sequence:

¾ Press the TRACE key.
¾ Press the DETECTOR softkey.

The submenu for selecting the detector opens.
¾ Using the cur s or keys or the rotary knob, se lect th e

detector you want and confirm by pressing the
ENTER key or the DETECTOR softkey.

The R&S FSH3 indicates the detector that has been
selected in the top left-hand corner of the screen
(Detect: Auto Pk in Fig. to right).

Trace memory

The R&S FSH3 can transfer a trace to the trace memory and also display the current trace and the
trace in the trace m emory for c omparison. T he saved t race is always displ ayed in white to dis tinguis h it
from the current trace.

Operating sequence:

¾ Press the TRACE key.
¾ Press the TRACE -> MEMORY softkey.

The R&S FSH 3 transfers the currently displa yed trace
to the trace memory.

¾ Press the SHOW MEMORY softkey.
The R&S FSH3 displays the saved tr ace in white. T he

SHOW MEMORY softk ey label is highlighted in green
to indicate that the trac e in the trace memory is bei ng
displayed.

¾ To r emove the saved trace from the screen, press

the SHOW MEMORY softkey again.

Note: The memory trace is bit-mapped into the picture memory. Therefore, when th e memory

trace is recalled, it will not be adapted to any modifications of the reference level or span
that may have been made in the meantime.

When a stored data set is called, the R&S FSH3 stores the associated trace in the trace

memory. The stored trace can be displayed with SHOW MEMORY.

1145.5973.12 4.21 E-6

Using the Markers R&S FSH3

Using the Markers

The R&S FSH3 has a marker and a delta marker to make it easier to read off trace values. The markers
cannot leave the trace an d indicate the frequency and level of the po int they are positioned on. The
frequency indicated b y a mark er is shown b y a vertical line whic h extends f rom the top to the b ottom of
the measurement diagr am. The numerical frequenc y and level readouts are displa yed in the top left­hand corner of the screen. The unit is the same as the unit of the reference level.

The position of the d elta marker is indicated by a dashed line to distin guish it from the other m arker.
The delta mark er level is a lways a lev el relative to the m ain mark er level and so the delta m arker leve l
unit is always dB . The delta mark er frequency is alwa ys relative to the m ain marker – in oth er words,
the delta marker frequency is the frequenc y difference between the fr equency at the point mark ed by
the main marker and the frequency at the point marked by the delta marker.

Marker menu

Delta marker

Marker

Delta marker
symbol

Marker
symbol

Marker
frequency

Marker
level

Delta marker
frequency

Delta marker
level

Controlling the marker:

¾ Press the MARKER key.
The marker menu opens. If, as yet, no marker has

been activated, the m ain marker (MARKER) is turne d
on automaticall y and placed on the maxim um level in
the spectrum. The frequency and level at the point
indicated by the m arker are displa yed at the top of the
screen in the select ed unit ( = referenc e level un it). Th e
value entry box for the marker frequency opens.

The following actions can now be performed:
¾ Change the mark er position using the rotary k nob

or the cursor keys.

¾ Enter a m arker position with the num ber keys and

terminate the entry with one of the unit keys.

¾ Confirm the marker position by pressing the

ENTER key or the MARKER softkey.

1145.5973.12 4.22 E-6

R&S FSH3 Using the Markers

Controlling the delta marker:

¾ Press the MARKER key.
¾ Press the DELTA softkey.

The R&S FSH3 turns on the delta mark er and places it
on the second largest signal on the trace. The
frequency and leve l displayed at the top of the screen
are relative to the main marker, i.e. the R&S FSH3
always outputs the freque ncy difference and the le vel
difference between the points marked by the main
marker and the delta marker. Simultaneously, the
value entry box for the delta marker frequency
difference is opened.

The following actions can now be performed:
¾ Change the delta marker position with the rotary

knob or the cursor keys.

¾ Enter a delta m arker pos ition wit h the num ber ke ys

and confirm with a unit key.

¾ Confirm the delta marker position by pressing the

ENTER key or the DELTA MARKER softkey.

Automatic marker positioning

The R&S FSH3 has func tions that m ake s etting m ark ers easier or allo w instr um ent settings to be m ade
on the basis of the current marker position:

• PEAK This function places the mark er or the delta mark er on the highest
value of the trace. The f unction acts on the active marker , whose
associated softkey labelling is highlighted in red.

• NEXT PEAK Relative to their current positions, this f unction places the marker
or the delta marker on the next highest peak of the trace.

• MINIMUM The marker or delta marker is placed on the lowest value of the
trace. The function acts on the active marker. When the trace is
displayed in the CLEAR/WRITE mode, the mark er is place d o n t he
lowest maximum of the trace.

• CENTER = MRK FREQ When this function is called, the center frequency (CENTER) is
made equal to the current marker frequency or the delta marker
frequency, depending on which marker is activated ( softkey label
highlighted in red). T his f unction is par tic ularl y useful if you want to
investigate a signal more closely using a smaller span. This is
accomplished by firs t placing the signal in the center of the span
and then reducing the span.

• REF LVL = MRK LVL This function makes the level indicated by the marker the
reference level. This makes it easy to optimize the R&S FSH3's
level display range if the leve ls being in ves t iga t ed are low.

1145.5973.12 4.23 E-6

Using the Markers R&S FSH3

Operating sequence:

¾ Press the MARKER key.
¾ Press the SET MARKER softkey.
¾ Using the cur s or keys or the rotary knob, se lect th e

function you want.

¾ Confirm your selection with the ENT ER key or the

SET MARKER softkey.

The R&S FSH3 then performs the action you have
selected.

Using more than one marker at a time (multimarker mode)

To measure diff erent signa ls in a trace, th e R&S FSH3 has t he m ultimark er function. U p to s ix diff erent
markers are availabl e in the multimarker mode. Marker 1 measures in absol ute units. Markers 2 to 6
can measure in abso lute units (m ark er) as well as r elative u nits (de lta). T he ref erence f or delta m ark ers
is always marker 1.

Operating sequence:

¾ Press the MARKER key.
¾ Press the MARKER MODE softkey.
¾ Using the cursor keys or the rotary knob, select

MULTI MARKER... from the submenu.

¾ Confirm your selection with the ENT ER key or the

MULTI MARKER softkey.

The R&S FSH3 is now in multimarker mode.
Except for the MARKER DEMOD softkey that is
replaced by the MKR LIST VIEW softkey in
multimarker mode, this menu is identical to the
standard marker menu. The marker designation
contains the number of the marker in question (M
becomes M1, D becomes D2). The active marker or
delta marker is displayed with its num ber (e.g. M1: or
D2:) and the frequency and level at the upper-right
hand corner of the screen.

1145.5973.12 4.24 E-6

R&S FSH3 Using the Markers

¾ Press the MARKER or DELTA softkey.
The R&S FSH3 opens a list f or selecting t he m arker or

delta marker to be edited. The markers that are already
switched on are highlighted in green. The (delta)
marker numbers alread y allocated to a (delta) m arker
are deactivated, i.e. greyed out.

¾ Using the rot ary knob or the cursor keys, select the

marker or delta mark er you want and confirm your
selection with the ENTER key or the MARKER or
DELTA softkey.

The R&S FSH3 opens the entry box f or the frequency
of the selected marker or the spacing between the
delta marker and the reference marker M1.

¾ Using the cursor keys, place the marker or delta

marker near the position you want. The step widt h
here is 10 % of the X axis.

¾ Then use the rotary knob to fine-tune the marker or

delta marker to the signal The step width
corresponds to the pixel spacing of the trace.

¾ Alternatively, enter the desired position of the

marker or delta mark er using the num ber ke ys and
terminate the entry with one of the unit keys.

The R&S FSH3 displays the marker or delta m arker last edited in the m arker readout box at th e upper
left-hand corner of the s creen. All marker func tions in the SET MARKER menu a pply to the displayed
markers.

1145.5973.12 4.25 E-6

Using the Markers R&S FSH3

Automatic marker positioning:

Automatic positio ning of markers in multim arker mode
is similar to that of the normal marker. The different
functions always apply to the active marker, which is
also indicated for the various functions in the SET
MARKER menu (example: "M2; PEAK").

In addition, it is possible to position all activated
markers (M1 to M6) at the peak of a trace.

¾ In the SET MARKER m enu, select ALL MKR TO

PEAK and confirm this with the ENTER key or the
SET MARKER softkey.

The R&S FSH3 sets all activated markers to the
maxima of the trace. The delta markers remain
unaffected by this function.

Displaying all multimarker values:

The R&S FSH3 can display a list of all activated markers and their values.
¾ Press the MKR LIST VIEW softkey.

The R&S FSH3 displays a list of all activate d markers
and delta markers.

If you press the MKR LIST VIEW softkey again or any
other softkey in the marker menu, the R&S FSH3
closes the marker table.

Deactivating markers:

In multimarker mode, markers can be deactivated one at a time or all at once.

1145.5973.12 4.26 E-6