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
1. The unit may be used only in the operating conditions and positions specified by the manufacturer. Unless otherwise agreed, the following
applies to R&S products:
IP degree of protection 2X, pollution severity 2
overvoltage category 2, only for indoor use, altitude max. 2000 m.
The unit may be operated only from supply net-
works fused with max. 16 A.
Unless spec ified otherwise 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
> 30 V, suitable measures should be taken to
avoid any hazards.
(using, for example, appropriate measuring
equipment, fusing, current limiting, electrical
separation, insulation).
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.
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.
If a different 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.
If units without power switches are integrated in
racks or systems, a disconnecting device must
be provided at system level.
Weight
indication for
units >18 kg
PE terminal Ground
terminal
Danger!
Shock hazard
6. Applicable local or national safety regulations
and rules for the prevention of accidents must
be observed in all work performed.
Prior to perf orming any work on the unit or open-
ing the unit, the latter must be disconnected
from the supply network.
Any adjustments, replacements of parts, main-
tenance or repair may be carried out only by authorized R&S technical personnel.
Only original parts may be used for replacing
parts relevant to safety (eg power switches,
power transformers, fuses). A safety test must
rms
be performed after each replacement of parts
relevant to safety.
(visual inspection, PE conductor test, insulation-
7. Ensure that the connections with information
technology equipment comply with IEC950 /
EN60950.
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).
NiMH batteries are suitable for environmentally-
friendly disposal or specialized recycling. Dispose them into appropriate containers, only.
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 connectors may dam-
Warning!
Hot surfaces
Ground
age the equipment. For the safe handling and
operation of the equipment, appropriate
measures against electr ostatics should be implemented.
Attention!
Electrostatic
sensitive devices require
special care
Page 8
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.
Page 9
Certified Quality System
Certified Environmental System
ISO 9001
DQS REG. NO 1954 QM
Qualitätszertifikat
Sehr geehrter Kunde,
Sie haben sich für den Kauf eines Rohde &
Schwarz-Produktes entschieden. Hiermit
erhalten Sie ein nach modernsten Fertigungsmethoden hergestelltes Produkt. Es
wurde nach den Regeln unseres Qualitätsmanagementsystems entwickelt, gefertigt und geprüft. Das Rohde & SchwarzQualitätsmanagementsystem ist u.a. nach
ISO 9001 und ISO14001 zertifiziert.
ISO 14001
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 standards such as ISO9001 and ISO14001.
DQS REG. NO 1954 UM
Certificat de qualité
Cher client,
Vous avez choisi d'acheter un produit
Rohde & Schwarz. Vous disposez donc
d'un produit fabriqué d'après les méthodes les plus avancées. Le développement,
la fabrication et les tests respectent nos
normes de gestion qualité. Le système de
gestion qualité de Rohde & Schwarz a été
homologué, entre autres, conformément
aux normes ISO 9001 et ISO14001.
Page 10
Spare Parts Express Service
Phone: +49 89 4129 - 12465
Fax: +49 89 41
E-mail:werner.breidling@rsd.rohde-schwarz.com
29 - 13306
In case of urgent spare parts requirements for this Rohde &
Schwarz unit, please contact our spare parts express
service.
Outside business hours, please leave us a message or
send a fax or e-mail. We shall contact you promptly.
1007.9016
Page 11
Adressen/Addresses
FIRMENSITZ/HEADQUARTERS
Rohde & Schwarz GmbH & Co. KG
Mühldorfstraße 15 · D-81671 München
Postfach 80 14 69 · D-81614 München
ROHDE & SCHWARZ International GmbH
Liaison Office Istanbul
Bagdad Cad. 191/3, Arda Apt. B-Blok
81030 Selamicesme-Istanbul
ROHDE & SCHWARZ
Representative Office Kiev
4, Patris Loumoumba ul
01042 Kiev
ROHDE & SCHWARZ International GmbH
Liaison Office Abu Dhabi
P.O. Box 31156
Abu Dhabi
ROHDE & SCHWARZ Bick Mobile
Communication
P.O.Box 17466
Dubai
ROHDE & SCHWARZ Emirates L.L.C.
Ahmed Al Nasri Building, Mezzanine Floor,
P.O.Box 31156
Off old Airport Road
Behind new GEMACO Furniture
Abu Dhabi
ROHDE & SCHWARZ UK Ltd.
Ancells Business Park
Fleet
Hampshire
GU 51 2UZ England
AEROMARINE S.A.
Cerro Largo 1497
11200 Montevideo
ROHDE & SCHWARZ, Inc.
Broadcast & Comm. Equipment
(US Headquarters)
8661-A Robert Fulton Drive
Columbia, MD 21046-2265
Rohde & Schwarz Inc.
Marketing & Support Center / T&M
Equipment
2540 SW Alan Blumlein Way
M/S 58-925
Beaverton, OR 97077-0001
Rohde & Schwarz Inc.
Systems & EMI Products
8080 Tristar Drive
Suite 120
Irving, Texas 75063
EQUILAB TELECOM C.A.
Centro Seguros La Paz
Piso 6, Local E-61
Ava. Francisco de Miranda
Boleita, Caracas 1070
REPRESENTACIONES BOPIC S.A.
Calle C-4
Qta. San Jose
Urb. Caurimare
Caracas 1061
rohdeukr@rsoe.rohde-schwarz.com
rsacomms@rsa.rohde-schwarz.com
+90 (216) 385 19 17
+90 (216) 385 19 18
rsturk@superonline.com
+38 (044) 268 60 55
+38 (044) 268 83 64
+971 (2) 633 56 70
+971 (2) 633 56 71
michael.rogler@rsd.rohde-
rsuaeam@emirates.net.ae
+44 (1252) 81 88 88 (sales)
+44 (1252) 81 88 18 (service)
sales@rsuk.rohde-schwarz.com
mjn@aeromarine.com.uy
rsatv@rsa.rohde-schwarz.com
info@rsa.rohde-schwarz.com
info@rsa.rohde-schwarz.com
r_ramirez@equilabtelecom.com
schwarz.com
+971 (4) 883 71 35
+971 (4) 883 71 36
www.rsbick.de
+971 (2) 631 20 40
+971 (2) 631 30 40
+44 (1252) 81 14 47
+598 (2) 400 39 62
+598 (2) 401 85 97
+1 (410) 910 78 00
+1 (410) 910 78 01
+1 (503) 627 26 84
+1 (503) 627 25 65
+1 (469) 713 53 00
+1 (469) 713 53 01
+58 (2) 12 34 46 26
+58 (2) 122 39 52 05
+58 (2) 129 85 21 29
+58 (2) 129 85 39 94
incotr@cantv.net
Vietnam
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
siehe / see MexicoWest Indies
+84 (4) 834 61 86
+84 (4) 834 61 88
svnhn@schmidtgroup.com
Page 16
R&S FSH Manuals
Contents of Manual for Spectrum Analyzer R&S FSH
Service Manual - Instrument
The Service Manual - Instrument describes how to check c ompliance with rated specific ations, as well
as instrument func tion, repair, troubleshooting and fault elimination. It c ontains all information required
when repairing the R&S FSH by replacing modules.
This Service Manual consists of f our chapter s and an annex (chapter 5) that describes how to ship the instrument and to order spare parts.
Chapter 1provides all the information nec essary to check for complianc e with rated specifica-
tions. The required test equipment is also specified.
Chapter 2describes the m anual adjustm ent of the calibration source and of the frequency ac-
curacy as well as the automatic adjustm ent of individual m odule data following m odule replacement.
Chapter 3describes the design as well as simple measur es for repair and fault diagnosis, in-
cluding in particular the replacement of modules.
Chapter 4contains information about extensions and modifications by installing instrument
software and retrofitting options.
Chapter 5describes how to ship the instrument and order spare parts, and contains spare
parts lists.
Operating Manual
The Operating Manual provides infor mation about the technic al specif ications, the contr ols and connectors on the fr ont and rear panel, requir ed steps f or plac ing the instrum ent into operation, the bas ic operating concept, as well as manual and remote control.
Typical measurem ent tas ks are explained in detail using the func tions of the user interface and program
examples.
The Operating Manual also provides usef ul information on preventive m aintenance and fault diagnosis
by means of warnings and error messages output by the unit.
Quick Start Manual
The Quick Start Manual provides information about typical measurement tasks, the basic operation
concept, as well as manual and remote control. Each of these items is explained in detail using the functions of the user interface and program examples.
1145.5973.82 0.1 E-4
Page 17
Manuals R&S FSH
Service and Repair
If your equipment requires service or repair or if you want to order spare parts and modules, please
contact your Rohde & Schwarz support center or our spare parts express service.
Rohde & Schwarz representatives and the address of our spare parts express service are listed in the
front section of this service manual.
You will need to provide the f ollowing infor m ation in order f or us to respond to your inquiries quick ly and
accurately and to determine whether the warranty for your instrument is still valid:
• Instrument model
• Serial number
• Firmware version
• Detailed error description in case of repair
• Contact partner for checkbacks
Rohde & Schwarz offers the following calibrations:
• Calibration on R&S-type test systems. The calibration docum entation meets the r equirements of the
quality management system ISO 9000.
• Calibration at an R&S calibration center approved by the German Calibration Service (DKD). T he
calibration documentation consists of the DKD calibration certificate.
Refer to Chapter 5 for a detailed description of how to ship the instrument and to order spare parts.
1145.5973.82 0.2 E-4
Page 18
R&S FSH Test Instructions
1 Performance Test
Test Instructions
• The rated specifications of the analyzer are tested after a warm-up tim e of at least 15 minutes. Only
by adhering to this requirement can compliance with the guaranteed data be ensured.
• Values specified in the following sections are not guaranteed. Only the technical specifications
provided on the data sheet are binding.
• The values specified in the data sheet are the guaranteed limits.
• Inputs for settings during measurements are shown as following:
[<KEY>] Press a key on the front panel, eg [SPAN]
[<SOFTKEY>] Press a softkey, e.g. [MARKER -> PEAK].
[<nn unit>] Enter a value and terminate by entering the unit, e.g. [12 kHz].
Successive entries are separated by [:], e.g. [ BW : MANUAL RES BW : 3 kHz ].
Measuring Equipment and Accessories
Item Type of
equipment
1 Signal generator Frequency:
2 6-dB divider
(power splitter)
3 Power meter R&S NRVD 0857.8008.02 Frequency response
4 Power sensor 1 MHz to 6 GHz
5 N cable Attenuation < 1 dB to 6 GHz Tracking generator output
The frequency of the reference oscillator can be adjusted by means of a
service function (refer to Chapter 2 "Adjustment").
1145.5973.82 1.2 E-5
Page 20
R&S FSH Performance Test
Checking the level accuracy and the frequency response
Test equipment: - Signal generator (refer to section "Measurement Equipment and
Accessories", item 1)
- Power meter (refer to section "Measurement Equipment and
Accessories", item 3)
- Power sensor (refer to s ection "Measurement Equipment and
Accessories", item 4)
- 6-dB p ower splitter (refer to section "Measurement Equipment and
Accessories", item 2)
Determining the level accuracy at 100 MHz
Test setup: ¾ Connect the power sensor (item 4) to the power meter and execute
function ´ZERO´ when there is no signal applied to the power sensor.
¾ Connect the RF output of the signal generator to the input of the
divider.
¾ Connect output 1 of the divider to the power sensor / power meter.
¾ Connect output 2 of the divider to the RF input of the R&S FSH.
Signal generator settings: - Frequency 100 MHz
- Level 6 dBm
¾ Determine the output power of the signal generator with the power
meter. Adjust the output power of the generator until the power meter
shows
0 dBm.
R&S FSH settings:
- [ PRESET ]
- [ FREQ : 100 MHz ]
- [ AMPT: 0 dBm ]
- [ SPAN : 100 kHz ]
- [ BW : MANUAL RES BW : 10 kHz ]
- [ TRACE : DETECTOR : RMS ]
¾ Set the marker to the peak of the signal.
- [ MARKER: SET MARKER: PEAK ]
Evaluation: The difference between the signal levels measured with the power meter
and the level reading of the marker reflects the absolute level error of the
R&S FSH. It can be calculated as:
= L
Level error
100 MHz
- L
powermeter
1145.5973.82 1.3 E-5
Page 21
Performance Test R&S FSH
Checking the frequency response
For the measurement of the frequency response, the value at 100 MHz for each reference level setting is
used as the reference. The reference level influences the RF attenuation (RF attenuation = +10 dBm +
reference level).
Test setup: ¾ Connect the RF output of the signal generator to the input of the
divider.
¾ Connect output 1 of the divider to the power sensor / power meter.
¾ Connect output 2 of the divider to the RF input of the SA..
Signal generator settings: - Frequency {f
} *
in
- Level -4 dBm
Determine the output power of the signal generator with the power meter.
Adjust the output power of the generator until the power meter shows
-10 dBm.
R&S FSH settings:
- [ PRESET ]
- [ AMPT : Ref_Lev*) ]
- [ SPAN : 100 kHz ]
- [ BW : MANUAL RES BW : 10 kHz ]
- [ TRACE : DETECTOR : RMS ]
- [ FREQ : CENTER : {f
- [ SETUP : Hardware Setup: Low Noise]
in
} * ]
*) Refer to table under “Performance Test Report” for values of Ref_Lev
and f
.
in
If the a RF preamplifier is installed, its frequency response has to be
checked also. To switch it on please enter:
Reference measurement:
- [ SETUP : Hardware Setup: Preamp: ON ]
¾Determine signal level L
powermeter
.
¾ Set the marker to the peak of the signal.
- [ MARKER: SET MARKER: PEAK ]
The signal level L
Ref
100MHz
is displayed by the level reading of the marker.
= L
- L
powermeter
Measurement
Signal generator settings:
Power meter settings:
- Frequency {fin}
Refer to table under “Performance Test Report” for values of {f
Determine the signal level L
powermeter
. To achieve higher accuracy,
}.
in
compensating the frequency response of the power sensor is
R&S FSH settings:
recommended.
- [ FREQ : {f
Refer to table under “Performance Test Report” for values of {f
} ]
in
}.
in
¾ Set the marker to the peak of the signal.
- [ MARKER: SET MARKER: PEAK ]
The signal level L
is displayed by the level reading of the marker.
Evaluation: The frequency response can be calculated as:
Frequency response = L
- L
powermeter
- Ref
100 MHz
1145.5973.82 1.4 E-5
Page 22
R&S FSH Performance Test
Checking the accuracy of the RF attenuator
Test principle:
The RF attenuator of the R&S FSH can be switched from 0 to 30 dB in
10-dB increments by changing the reference level (RF attenuation = +10
dBm + reference level).
Test equipment: - Signal generator (refer to section "Measurement Equipment and
Accessories", item 3)
Frequency 100 MHz
Maximum level ≥ 6 dBm
Test setup: ¾ Connect the RF output of the signal generator to the input of the
divider.
¾ Connect output 1 of the divider to the power sensor / power meter.
¾ Connect output 2 of the divider to the RF input of the R&S FSH.
Signal generator settings: - Frequency 100 MHz
- Level -14 dBm
¾ Determine the output power of the signal generator with the power
meter. Adjust the output power of the signal generator until the power
meter shows -20 dBm ± 0.2 dB.
R&S FSH settings:
- [ PRESET ]
- [ FREQ : 100 MHz ]
- [ SPAN : 10 kHz ]
- [ BW : MANUAL RES BW : 1 kHz ]
- [ BW : MANUAL VIDEO BW : 100 Hz ]
- [ TRACE : DETECTOR : RMS ]
- [ AMPT:0 dBm ]
- [ SETUP : Hardware Setup: Low Noise ]
Reference measurement: ¾ Set the marker to the peak of the signal.
[ MARKER: SET MARKER: PEAK ]
The signal level L
Ref
0dBm
is displayed by the level reading of the marker.
= L
- L
powermeter
Measurement
Signal generator settings: - Frequency 100 MHz
- Level Ref_Lev *) – 14 dB
*) Refer to table under “Performance Test Report” for values of {Ref_Lev}.
¾ Determine the output power of the signal generator with the power
meter. Adjust the output power of the generator until the power meter
shows the value Ref_Lev – 10 dB.
R&S FSH settings:
- [ AMPT : {Ref_Lev} ]
- [ MARKER: SET MARKER: PEAK ]
Evaluation: The signal level L
The difference between the level inaccuracy of the R&S FSH and Ref
is displayed by the level reading of the marker.
0dBm
(at 10 dB RF-Att) is the uncertainty of the RF attenuation:
IF-Gain
accuracy
= (L - L
powermeter
) – Ref
0dBm
1145.5973.82 1.5 E-5
Page 23
Performance Test R&S FSH
Checking the accuracy of the IF gain setting
Test principle: The IF gain of the R&S FSH can be switched from 0 to 15 dB by changing
the reference level.
Test equipment: - Signal generator (refer to section "Measurement Equipment and
Accessories", item 3)
Frequency 100 MHz
Maximum level ≥ -10 dBm
Test setup: ¾ Connect the RF output of the signal generator to the input of the
divider.
¾ Connect output 1 of the divider to the power sensor / power meter.
¾ Connect output 2 of the divider to the RF input of the SA.
Signal generator settings: - Frequency 100 MHz
- Level -4 dBm
R&S FSH settings:
Reference measurement:
¾ Determine the output power of the signal generator with the power
meter. Adjust the output power of the generator until the power meter
shows -10 dBm ± 0.2 dB.
- [ PRESET ]
- [ FREQ: 100 MHz ]
- [ SPAN : 10 kHz ]
- [ BW : MANUAL RES BW: 1 kHz ]
- [ BW : MANUAL VIDEO BW : 100 Hz ]
- [ TRACE : DETECTOR : RMS ]
- [ AMPT : Ref_Lev *)]
*) Refer to table under “Performance Test Report” for values of {Ref_Lev}.
¾ Set the marker to the peak of the signal.
- [ MARKER: SET MARKER: PEAK ]
The signal level L is displayed by the level reading of the marker.
Ref
-10dBm
= L - L
powermeter
Measurement
Signal generator settings: - Frequency 100 MHz
- Level Ref_Lev + 6 dB
¾ Determine the output power of the signal generator with the power
meter. Adjust the output power of the generator until the power meter
shows the value Ref_Lev ± 0.2 dB.
R&S FSH settings:
- [ AMPT : {Ref_Lev} ]
*) Refer to table under “Performance Test Report” for values of Ref_Lev.
- [MARKER: SET MARKER: PEAK ]
Evaluation: The signal level L
The difference between the level inaccuracy of the R&S FSH and Ref
(at 0 dB IF gain) is the uncertainty of the IF gain:
10dBm
IF-Gain
accuracy
is displayed by the level reading of the marker.
= (L
- L
powermeter
) - Ref
-10dBm
-
1145.5973.82 1.6 E-5
Page 24
R&S FSH Performance Test
Checking the displayed average noise floor
Test equipment:
Test setup:
R&S FSH settings:
50-Ω termination (refer to section "Measurement Equipment and
Accessories", item 6)
¾ Terminate the RF input of the R&S FSH with 50 Ω.
- [ PRESET ]
- [ SPAN : ZERO SPAN ]
- [ Manual Res BW : 1 kHz ]
- [ Manual Video BW : 10 Hz ]
- [ TRACE : TRACE MODE: AVERAGE ]
- [ AMPT : -30 dBm ]
- [ FREQ : {f
Refer to table under “Performance Test Report” for values of f
Measurement: ¾ Read out the marker level.
Evaluation: The displayed average noise floor is displayed by the level reading of the
marker.
} ]
n
.
n
1145.5973.82 1.7 E-5
Page 25
Performance Test R&S FSH
Checking the phase noise
Test equipment: Signal generator (refer to section "Measurement Equipment and
Test setup: ¾ Connect the RF output of the signal generator to the RF input of the
R&S FSH.
Signal generator settings: - Frequency 500 MHz
- Level 8 dBm *)
*) The overrange of the AD converter is used for higher dynamic range.
R&S FSH settings:
- [ PRESET ]
- [ FREQ : 500 MHz ]
- [ AMPT : 0 dBm ]
- [ SPAN : {span} ]
- [ BW : RBW MANUAL : {RBW} ]
Depending on the offset, refer to the table below for values of RBW and
span.
- [ TRACE : TRACE MODE: AVERAGE ]
- Marker to peak
[MARKER: SET MARKER: PEAK ]
- Delta marker to {offset}
[MARKER: DELTA: {offset}: kHz ]
- Set marker mode to noise measurement
[MARKER: MARKER MODE: NOISE ]
Evaluation: The phase noise is displayed in the marker field by the reading
Delta [dBc/Hz]´.
Phase noise measurement settings
Offset Span RBW
30 kHz 100 kHz 1 kHz
100 kHz 220 kHz 10 kHz
1 MHz 2.2 MHz 100 kHz
1145.5973.82 1.8 E-5
Page 26
R&S FSH Performance Test
Checking the display linearity
Test equipment: - Signal generator (refer to section "Measurement Equipment and
Accessories", item 1)
- Power meter (refer to section "Measurement Equipment and
Accessories", item 3)
- Power sensor (refer to section "Measurement Equipment and
Accessories", item 4)
- 6-dB power splitter (refer to section "Measurement Equipment and
Accessories", item 2)
Test setup: ¾ Connect the power sensor (item 4) to the power meter and execute
function ´ZERO´ when there is no signal applied to the power sensor.
¾ Connect the RF output of the signal generator to the input of the
divider.
¾ Connect output 1 of the divider to the power sensor / power meter.
¾ Connect output 2 of the divider to the RF input of the R&S FSH.
st
1
Measurement
0 to 30 dB below reference level
Signal generator settings: - Frequency 100 MHz
¾ Determine the output power of the signal generator with the power
R&S FSH settings:
Reference measurement: ¾ Set the marker to the peak of the signal.
- Level + 6 dBm
meter. Adjust the output power of the generator until the power meter
shows
0 dBm.
- [ PRESET ]
- [ AMP T: 0 dBm ]
- [ FREQ: 100 MHz ]
- [ SPAN : 10 kHz ]
- [ Manual Res BW : 1 kHz ]
- [ Manual SWPTime : 1 s ]
- [ TRACE : DETECTOR : RMS ]
- [MARKER: SET MARKER: PEAK ]
The signal level L
Ref
0dBm
is displayed by the level reading of the marker.
= L
- L
powermeter
Signal generator settings: - Frequency 100 MHz
- Level Sig_Lev + 6 dB
Refer to table under “Performance Test Report” for values of {Sig_Lev}.
¾ Determine the output power of the signal generator with the power
meter. Adjust the output power of the generator until the power meter
shows the value of {Sig_Lev}.
1145.5973.82 1.9 E-5
Page 27
Performance Test R&S FSH
Evaluation: The signal level L is displayed by the level reading of the marker.
The difference between the level inaccuracy of the R&S FSH and Ref
is the uncertainty of the display linearity:
nd
Measurement
2
30 to 50 dB below reference
level
Linearity
uncertainty
Because the sensitivity of the power meter is limited, the internal RF
attenuator of the Galaxy is used to increase the dynamic range of the
input signal.
= (L
- L
powermeter
) – Ref
R&S FSH settings:
- [ AMPT: 20 dBm ]
Signal generator settings: - Frequency 100 MHz
- Level - 4 dBm
¾ Determine the output power of the signal generator with the power
meter. Adjust the output power of the generator until the power meter
shows
-10 dBm.
Reference measurement: ¾ Set the marker to the peak of the signal.
- [MARKER: SET MARKER: PEAK ]
The signal level L
With the result of the 1
to be calculated. “Linearity
is displayed by the level reading of the marker.
st
linearity measurement, a new correction factor is
uncertainty
(-30dB)” is the measured uncertainty of
the R&S FSH linearity at 30 dB below reference level.
0dBm
0dBm
Ref
20dBm
= (L
- L
powermeter
Signal generator settings: - Frequency 100 MHz
- Level Sig_Lev + 6 dB
Refer to table under “Performance Test Report” for values of {Sig_Lev}.
¾ Determine the output power of the signal generator with the power
meter. Adjust the output power of the generator until the power meter
shows the value Sig_Lev ± 0.2 dB.
Evaluation: The signal level L
is displayed by the level reading of the marker.
The difference between the level inaccuracy of the R&S FSH and
Ref
is the uncertainty of the display linearity:
20dBm
Linearity
uncertainty
= (L
- L
) – Linearity
powermeter
) – Ref
uncertainty
20dBm
(-30dB)
1145.5973.82 1.10 E-5
Page 28
R&S FSH Performance Test Tracking Generator
Performance Test Tracking Generator
(Model 1145.5973.13, 1145.5973.23 or 1145.5973.26 only)
Checking output level / frequency response
Test equipment: - N cable (refer to section "Measurement Equipment and Accessories“,
item 5)
Frequency up to 3 GHz
Maximum attenuation < 0.2 dB
Test setup: ¾ Connect the tracking generator output to the RF input of the R&S FSH.
R&S FSH settings:
Measurement: Tune the marker to the maximum level of the trace.
- [ PRESET ]
- [ MEAS: TRACKING GENERATOR ]
- [ AMPT : REF: 10 dB ]
- [ FREQ : START FREQ 10 MHz ]
In the model 1145.5973.23 the output level of the tracking generator can
be set to 0 dBm. Check the output level also with this setting:
- [ PRESET ]
- [ MEAS: TRACKING GENERATOR ]
- [ Output Level : 0 dBm ]
- [ AMPT : REF: 10 dB ]
In the FSH6 the output level of the tracking generator is measured with
two different frequency settings :
1)
- [ FREQ : START FREQ 10 MHz ]
- [ FREQ : STOP FREQ 3 GHz ]
2)
- [ FREQ : START FREQ 3 GHz ]
- [ FREQ : STOP FREQ 6 GHz ]
- [MARKER: <tune the marker> ]
Read out the marker level.
Tune the marker to the minimum value of the trace.
Read out the marker level.
1145.5973.82 1.11 E-5
Page 29
Performance Test Report R&S FSH
Performance Test Report
Table 1-1 Performance Test Report
ROHDE & SCHWARZ Performance Test Report Spectrum Analyzer Version 2 April 2004
Model ( ):
Order number:
Serial number:
Test person:
Date:
Sign:
Characteristic Included in Min. value Actual value Max. val ue Unit Measurement
Frequency accuracy
Reference oscillator
Level accuracy
at 100 MHz with
Ref_Lev = 0 dBm
Page 1.2
0.999999
Page 1.3
-0.5
________
________
1.000001
+0.5
GHz
dB
uncertainty
1145.5973.82 1.12 E-5
Page 30
R&S FSH Performance Test Report
Characteristic Included in Min. value Actual value Max. val ue Unit Measurement
This chapter describes the adjustment of the software-contr olled m odule data following the replacem ent
of modules.
Adjustments can be perf ormed only by using the adjustment program that is available from the R&S
Service Board on the R&S Internet site. Using this program prevents mistakes in the calibration data.
The R&S FSH permits the following manual adjustments:
• Adjustment of the 10-MHz reference oscillator that determines the frequency accuracy of the
R&S FSH.
•Adjustment of the level accuracy of the R&S FSH for different attenuator settings.
Adjustment enables you to maintain and restore the data integrity of the instrument.
Manual adjustments m ust be perf orm ed at an am bient tem per ature between +20°C and +30°C after the
instrument has warmed up.
After the adjustm ents have been perf orm ed, the R&S FSH is ready for use and off ers f ull data integrity.
This can be verified by performing the Performance Test as described in Chapter 1.
Verifying the functionality of the R&S FSH is recommended before you start perf orming adjustm ents or
the performance test. The verification procedure is described in the following section, ”Quick
Verification”.
Quick Verification
The quick verific ation procedure verifies hardware functionality before full testing can start. Te sting of
the following is recommended:
• On/off functionality
• Connections of the power adapter and the AF output
• Display
• Level and noise
1145.5973.82 2.1 E-4
Page 38
Measurement Equipment and Accessories for Quick Verification R&S FSH
.
Measurement Equipment and Accessories for Quick
Verification
The quick verification procedure requires a very limited amount of equipment.
Item Type of
equipment
1 Signal generator Frequency: 10 MHz to 3 GHz R&S SML Level
2 N-cable Attenuation: < 0.2 dB to 3 GHz Tracking generator output
Specifications recommended Equipment
recommended
R&S order
no.
Use
level
Verifying on/off functionality
Test equipment None
R&S FSH settings Switch instrument ON.
Measurement ¾ Verify that the instrument switches ON.
Verifying power and AF connections
Test equipment None
Accessories AC power adapter
Headphone
R&S FSH settings Switch instrument ON.
Connect the AC power supply.
Reference measurement ¾ Verify in the display that the battery symbol changes to a power plug
R&S FSH settings Connect the headphone.
- [ Marker : MARKER DEMOD : AM ]
Reference measurement ¾ Verify that a noise signal is heard on the headphone.
1145.5973.82 2.2 E-4
Page 39
R&S FSH Measurement Equipment and Accessories for Quick Verification
Verifying the display
Test equipment None
R&S FSH settings Switch instrument ON.
Reference measurement ¾ Check the display for disturbance.
Verifying the level and noise
Test princ iple The RF attenuator of the R&S FSH can be switched from 0 to 30 dB by
changing the reference level in the instrument.
Test equipment - Signal generator (refer to section "Measurement Equipment and
Accessories for Quick Verification", item 1).
Frequency 100 MHz
Maximum level ≥ 6 dBm
Test setup ¾ Connec t the RF output of the signal generator to the input of the
R&S FSH.
Signal generator settings - Frequency 100 MHz
R&S FSH settings
Verification
- Level
- [ PRESET ]
- [ FREQ : 100 MHz ]
- [ SPAN : 10 kHz ]
- [ BW : RES BW MANUAL : 1 kHz ]
- [ BW : VIDEO BW MANUAL : 100 Hz ]
- [ TRACE : DETECTOR : RMS ]
- [ AMPT: 0 dBm ]
¾ Read the level and verify that it shows -20 dBm +/- 2 dB.
- 20 dBm
¾ Verify that the noise level in the display is < - 60 dBm.
Check 30 dB attenuation
Change signal generator setting
Change R&S FSH setting
Verification
- Level
- [ AMPT : -10 dBm]
-30 dBm
¾ Read the level and verify that it shows -30 dBm +/- 2 dB.
Check 10 dB attenuation
Change signal generator setting
Change R&S FSH setting
Verification
- Level
- [ AMPT : 10 dBm ]
-10 dBm
¾ Read the level and verify that it shows -10 dBm +/- 2 dB.
Check 0 dB attenuation
Change signal generator setting
Change R&S FSH setting
Verification
- Level
- [ AMPT : 20 dBm ]
0 dBm
¾ Read the level and verify that it shows 0 dBm +/- 2 dB.
1145.5973.82 2.3 E-4
Page 40
Measurement Equipment and Accessories for Quick Verification R&S FSH
Verify the tracking generator output level
Test principle The generator output must be connected to the RF input and verified.
Test equipment None
Test setup ¾ Connect the generator output of the R&S FSH to the RF input.
R&S FSH settings
Verification
Adjustment functions
Caution:
Only qualified personnel should carry out the re-alignment since any change
substantially influences the measurement accuracy of the instrument. For this
reason, the calibration program is available only on the R&S Service Board.
- [ PRESET ]
- [ MEAS : TRACKING GEN :]
¾ Verify that the level of the sweep shows 0 dB +5 /-7 dB.
¾ Following internal calibration, verify that the level shows 0 +/-1 dB.
1145.5973.82 2.4 E-4
Page 41
R&S FSH Adjustment
Adjustment
This section describes the measurement equipment and accessories required for the manual
adjustment of the R&S FSH, the appropriate preparations of the equipment, and the individual
adjustments.
An adjustment program provides the instructions for the input settings.
Adjustment Instructions
• The adjustment of the analyzer must be perfor m ed after a warm - up tim e of at leas t 30 m inutes. Only
by adhering to this requirement can compliance with the guaranteed data be ensured.
• Inputs for setting the R&S FSH during adjustment will be programmed automatically.
1145.5973.82 2.5 E-4
Page 42
Measurement Equipment and Accessories R&S FSH
Measurement Equipment and Accessories
Item Type of
equipment
1 Signal generator Frequency: 10 MHz to 3 GHz
2 6-dB divider
(power splitter)
3 Power meter R&S NRVD 0857.8008.02 Frequency response
4 Power sensor 1 MHz to 3 GHz
Specifications recommended Equipment
recommended
R&S SML Frequency accuracy of
Uncertainty of frequency: 0.1 ppm
Phase noise at 500 MHz:
< -100 dBc (1Hz) @ 10 kHz
< -110 dBc (1Hz) @ 100 kHz
< -130 dBc (1Hz) @ 1 MHz
Frequency response
R&S NRV-Z4 0828.3618.02 Frequency response
RSS ≤ 0.8%
Meter noise ≤ 20 pW
R&S order
no.
Use
reference oscillator
Adjusting the reference frequency accuracy
Test equipment Signal generator (refer to section "Measurement Equipment and
Accessories", item 2)
Test setup ¾ Connect the generator to the RF input.
Generator settings
R&S FSH settings - [ PRESET ]
Adjustment The program will adjust the reference oscillator to 10 MHz ± 1 ppm.
- Frequency 1 GHz
- Level -30 dBm
- [ FREQ : 1 GHz ]
- [ SPAN : 100 kHz ]
- [ BW : MANUAL RES BW : 10 kHz ]
- [ MARKER : MARKER MODE : FREQ COUNT ]
1145.5973.82 2.6 E-4
Page 43
R&S FSH Measurement Equipment and Accessories
Adjusting the level accuracy
Test equipment - Signal generator (refer to section "Measurement Equipment and
Accessories ", item 1)
- Power meter (refer to section "Measurement Equipment and
Accessories ", item 3)
- Power sensor (refer to section "Measurement Equipment and
Accessories ", item 4)
- 6-dB power splitter (refer to section "Measurement Equipment and
Accessories ", item 2)
Determining the level accuracy at 100 MHz
Test setup ¾ Connect the power sens or ( item 4) to the power meter and execute
function ´ZERO´ when there is no signal applied to the power
sensor.
¾ Connect the RF output of the signal generator to the input of the
divider.
¾ Connect output 1 of the divider to the power sensor / power meter.
¾ Connect output 2 of the divider to the RF input of the R&S FSH.
Signal generator settings - Frequency 100 MHz
- Level 6 dBm
R&S FSH settings
Adjustment The program will guide you through the required adjustments for
Save calibration data
¾ Deter mine the output power of the signal generator with the power
meter. Adjust the output power of the generator until the power
meter shows the expected level “Am pt”. This level is displayed on
the PC display during adjustment.
- Performed automatically via the adjustment program.
different levels.
If the measured values are within the program med limits, the new
constants will be autom atically stored in the R&S FSH and will be
used for future measurements.
1145.5973.82 2.7 E-4
Page 44
Frequency Response Correction R&S FSH
Frequency Response Correction
Frequency response correction is part of the RF/IF module and is delivered with the module in an
EEPROM. Any change requires the use of a special test program and test setup. If necessary, the
module must be sent to R&S Service.
1145.5973.82 2.8 E-4
Page 45
R&S FSH Instrument Design and Functional Description
3 Repair
This chapter describes the design of the R&S FSH, simple measures for repair and troubleshooting,
and, in particular, the replacement of modules.
Firmware updates and the installation of the DTF option are described in Chapter 4.
Instrument Design and Functional Description
The following figure shows a block diagram of the R&S FSH.
FSH6 only
IF 1b
3 - 6
MixerFilter
GHz
Filter
7231
MHz
x2
IF 2b
Mixer
x2
5.1 - 6.6 GHz
IN
100 kHz ..
6 GHz
Protection
Attenuator
LowPass
0 - 3
GHz
IF 1a
4031
MixerFilter
4 - 7 GHz
Filter
MHz
Synthesizer
4 - 7
GHz
Oscillator 1
(LO 1)
Audio and TRIGGER
12
Address, DATA and Control Bus
Oscillator 2
DATA Detector
Data
Memory
Optical
Interface
Optical
Adapter
Mainboard
Program
Memory
Fig. 3-1 Block Diagram R&S FSH
3.2 GHz
IF 2a
LCD
831.25
MixerBuffer
MHz
800 MHz
Reference
: 4
Power and
Battery
Management
MixerFilter
3.2 GHz
3.2
GHz
(LO 2)
Risc
Controller
Key pad
Module
IF 3
MHz
TCXO
EEPROM
To
xN
N = 1 for f < 3 GHz
N = 2 for f > 3 GHz
Power
Sensor
Trigger
Mainboard
Audio
OUT
Power
Adapt er
18 V
12
TG OUT
31.25
MHz
Noise
10
REF
Inter-
connection
Board
Battery
+
Temp
Sense
ADC
Mixer
3615.6
or 4031.2
MHz
Oscillator
(TG)
12
1145.5973.82 3.1 E-5
Page 46
Instrument Design and Functional Description R&S FSH
Description of the block diagram
The R&S FSH is a triple-conversion super-heterodyne receiver for the frequency range 100 kHz to
3 GHz. After signals are received, they are processed by the RF/IF board and the mainboard.
The RF/IF board contains the functions as described below.
Attenuator
The RF signal passes from the input connector RF INPUT to the programmable input attenuator, which
can be switched from 0 dB to 30 dB in increments of 10 dB. The circuitry is protected from overvoltage.
RF to IF conversion
The RF/IF board converts the received frequencies in the range 100 kHz to 3 GHz to the low 31.25 MHz
IF, which is digitized with 25 MHz before it is sent to the mainboard for digital processing. The RF/IF
board also includes the required local oscillators and associated frequency processing circuits. The unit
is housed in silver-plated aluminum packaging.
The input signal passes via the input attenuator and the lowpass filter to the first mixer. The lowpass
filter provides suppression of the image frequency (image = LO+ IF) to keep the conversion
unambiguous. In the 1st mixer the input signal is up-converted to an IF of 4031.25 MHz by means of the
first LO (4031.25 MHz to 7031.25 MHz). The mixer is followed by a low noise IF amplifier, which
compensates for the loss due to mixing. The signal then passes a filter with a 3-dB bandwidth of
approximately 400 MHz for filtering the first IF. The local oscillator frequency required for this conversion
is also generated on the board. This signal is generated by three VCOs synchronized to 100 MHz, which
in turn is synchronized to a Temperature Compensated 10-MHz Xtal Oscillator (TCXO). This TCXO is
electrically calibrated.
The signal from the 1st IF filter is converted to the 2nd IF of 831.25 MHz. The signal is routed to an
831.25 MHz filter with a 3-dB bandwidth of 20 MHz for further signal processing. The filter is followed by
the 3rd mixer, which converts to 31.25 MHz and utilizes an IF filter that has a -3-dB bandwidth of
approximately 2 MHz.
The frequency range above 3°GHz in the R&S FSH6 is converted via two additional mixers to a first IF
of 7231.25°MHz and to the same 2
signals of the FSH3 are doubled.
nd
IF as in the FSH3 of 831.25 MHz. As LO signals the oscillator
1145.5973.82 3.2 E-5
Page 47
R&S FSH Instrument Design and Functional Description
RF
Input
Protect.
/ Att.
0..30dB
3 to 6 GHz
100 kHz
to 3 GHz
1st Mixer
x 2
1st Mixer
3x
VCO
:2
R&S FSH6 only
1st IF Amp
1st LO
4031.25 .. 7031.25 MHz
loopfilter
30 kHz
:1
1/32
or
1/64
Syn-
con
1st IF Filter
7231.25 MHz
B= 600 MHz
1st IF Filter
4031.25 MHz
B= 400 MHz
LO1_TG
126..188 MHz
or 94..110 MHz
6.4 GHz10.23 to 13.23 GHz
2nd Mixer1st IF Amp
x 2
2nd Mixer
VCO
:2
PDPD
:1
loopfilter
30 kHz
2nd IF Amp
2nd LO
3200 MHz
1/4
2nd IF Filter
831.25 MHz
B= 20 MHz
1/8
100 MHz20 MHz
800 MHz
3rd Mixer3rd IF Amp
3rd LO
800 MHz
50 MHz
1/21/5
3rd IF Filter
31.25 MHz
B= 2 MHz
1/2
Disable
100kHz
noise
REF_TG
ADC
25 MHz
25 MHz
(DDC, DCON)
50 MHz
(Spider)
12
1/M
M= 2..15
100 MHz
TCXO
10 MHz
Fig. 3-2 Block Diagram: RF to IF Conversion and Synthesizer
1145.5973.82 3.3 E-5
Page 48
Instrument Design and Functional Description R&S FSH
The LO frequency of the 1st mixer is routed via isolation amplifiers to the TG mixer. The other input of
the mixer is a fixed frequency of 4031.25 MHz generated with a VCO locked to the TCXO frequency.
The resulting IF signal is routed to the generator output connector.
RF/IF control
The microcontroller available on the mainboard controls the RF/IF setting by programming registers via
an internal serial bus.
For calibration purposes the level correction values are stored in an EEPROM. This EEPROM also
contains module-specific information.
The temperature of the module is continuously measured, and the measured levels will be compensated
for drift if the temperature change is too great.
Mainboard
The mainboard is a combination of the power supply and the functions controlled by a dedicated RISC
controller (ARM 720).
Power and battery management
The ON/OFF key is de-bounced with the real-time clock in the controller. The ON/OFF function is
completely software controlled. This implies that the controller must be operational in order for the the
instrument to be switched ON. The µP-clock (50 MHz) is derived from the RF/IF board, thus requiring
that this board be present. This frequency will always be present if the power adapter is connected or
the instrument is in the ON state.
If the instrument is in the OFF state and the power supply is connected, the µP will control the charging
function of the battery depending on the battery condition. The maximum charging current is 1000 mA,
which drops to a trickle charge of about 100 mA if the battery is fully loaded. To prevent damage to the
battery, the charging stops if the battery temperature reaches ≤ 0°C or > 45°C. In the OFF state, the
charging current is approximately 90 mA.
This power supply and battery management arrangement uses a dedicated IC. The instrument can be
switched ON only if the battery is in operating condition. Thus, if the battery is completely empty, the
instrument cannot be switched ON until the charging current has re-loaded the battery, which takes
several minutes.
1145.5973.82 3.4 E-5
Page 49
R&S FSH Instrument Design and Functional Description
Processing of measured data detectors
The measured data is processed in two dedicated ICs to reduce the sample rate of the input signal to a
value that can be handled by the hardware. The DDC converts the digital IF signal to I/Q base band and
filters the base band signals using low pass filters with programmable bandwidth. In addtiotion it delivers
the AM or FM demodulated audio signal. The DCON Asic detects the envelope of the filtered and
combined base band signal and calculates its logarithm. It contains also the video filter and the different
detectors. In addition it is resposible for the sweep control of the FSH.
FM
DAC
AM
DAC
Audio
Amp
AF OUT
Measurement
data
12
DDC
DCON
Detectors
Filters
Counter
Address, DATA and control bus
Control
RAM
TRIGGER
Fig. 3-3 Measured Data Processing
Resolution bandwidths (RBW)
The resolution bandwidths are implemented in the R&S FSH through digital processing in the DDC
ASIC (Digital Down Converter). The RBW can be selected from within the range 1 kHz to 1 MHz in 1-, 3-
or 10-unit increments. The DDC first mixes its input IF to the baseband using an NCO (Numeric
Controlled Oscillator) and then filters the resulting IQ signals via a combination of HDF (High Decimation
Filter) and an FIR (Finite Impulse Response) stages. At the end of the DDC processing chain, the IQ
signal is split into magnitude and phase.
For AF demodulation the amplitude information is used. In the case of FM the phase information is used
and fed to the headphone connector. In the analyzer mode the signal at the position of the marker can
be demodulated. In this case the R&S FSH stops the sweep for a selectable period of time and
demodulates the input signal. The volume can be adjusted.
For a standard log display of the analyzed spectrum, the magnitude data is converted from linear to
logarithmic in the DCON ASIC (Digital CONtroller).
Video bandwidths (VBW)
The video filters can be adjusted between 10 Hz and 3 MHz in increments of 1/3/10. They are designed
as digital lowpass filters for the video signals in the DCON ASIC. Software can couple the VBW to the
RBW, or the VBW can be set independently.
1145.5973.82 3.5 E-5
Page 50
Instrument Design and Functional Description R&S FSH
Detectors
The R&S FSH uses a detector for the positive peak and the negative peak value. In the “sample” mode
the measured value is routed directly to the display. In the RMS“ mode the detector determines the rms
value of the input signal for one specific point in the display during the measured time.
Keypad control
Keypad control is a dedicated function of the controller. For the implementation of the rotary knob, an
encoder is used that is detected with a dedicated CPLD (Complex Programmable Logic Device). This
“One Time Programmable” CPLD is programmed during production.
Serial optical interface
The interface to an external PC has been implemented with optical technology to avoid electrical loops.
The protocol is RS-232-based and is implemented in the instrument by the UART of the controller. It
requires a special optical RS-232 cable for communication (R&S FSH-Z34, delivered with the
instrument). The maximum baud rate is 115200.
Power sensor
The power sensor uses the display of the R&S FSH. Communication is achieved with a separate UART
from the controller.
Color LCD module
The ¼ VGA passive matrix display is backlighted by an FCC backlight, whose light output can be
adjusted to an optimum between visibility and battery use.
1145.5973.82 3.6 E-5
Page 51
R&S FSH Module Replacement
Module Replacement
This section describes the service concept and contains the spare parts list and the basic documents for
the R&S FSH instrument.
Note: The numbers indicated in brackets refer to items in the mechanical exploded drawings.
Note: The words “left” and “right” in the manual always refer to the front view of the instrument.
• Please pay close attention to the safety instruc tions in
Caution!
the front section of this manual.
•Disconnect the power connector from the instrument
before opening the case.
•Safeguard the replacement site against electrostatic
discharge to prevent damage to electronic components
Wrist strap with cord
Building ground
of the modules.
• The following two methods of ESD protection can be
used together or separately:
- Wrist strap with cord to ground connection
- Conductive floor mat and heel strap combination
Ground connection
of operational site
Heel strap
Floor mat
1145.5973.82 3.7 E-5
Page 52
Module Replacement R&S FSH
2.2
S1
X2
9
S1
S1
8
10.2
5
10.1
S4
S4
S2
W1
S2
X2
S2
S4
S1
2.4
2.3
7
4
10.3
S3
S3
Fig. 3-4 Exploded View
S4
S4
S4
S4
S4
1
S1
S1
S4
3
6
2.1
1145.5973.82 3.8 E-5
Page 53
R&S FSH Module Replacement
Overview of the modules
Table 3-1 List of spare parts and order numbers
Reference Part R&S Order Number
1 Battery Pack for R&S FSH
(R&S FSH-Z32)
2 Housing R&S FSH without top holster 1157.3258.00
Top holster for FSH without tracking
4
5
6 Mainboard for R&S FSH 1157.3570.00
7 N connector 1157.3235.00
8 Interconnection board 1157.3587.00
9 Input unit (power and audio connectors,
10 Set of cables for R&S FSH 1157.3329.00
21 AC mains adapter for R&S FSH
22 AC mains adapter for R&S FSH
23 AC mains adapter for R&S FSH
AC mains adapter for R&S FSH
See exploded drawing on the previous page.
generator
Top holster for FSH with tracking generator 1157.3493.00
Front unit for R&S FSH3 1157.3241.00 3
Front unit for R&S FSH6 1300.7591.00
LCD module 1157.3229.00
LCD plane for FSH3 1300.7704.00
LCD plane for FSH6 1300.7710.00
RF/IF module for R&S FSH3 without tracking
generator
RF/IF Module for R&S FSH3 with tracking
generator
RF/IF Module for R&S FSH6 without tracking
generator
RF/IF Module for R&S FSH6 with tracking
generator
including wire tree)
(EU Version)
(UK Version)
(US Version)
(AUS Version)
1145.5796.02
1157.3487.00 2.4
1157.3606.00
1157.3612.00
1300.7604.00
1300.7610.00
1157.3270.00
1157.3293.00
1157.3306.00
1157.3312.00
1157.3370.00
1145.5973.82 3.9 E-5
Page 54
Module Replacement R&S FSH
Opening the instrument
(See exploded drawing for related numbers.)
¾ Disconnect the power plug.
¾ Switch the instrument to OFF.
¾ Loosen the six (S1) screws and remove the top cover (2.4) and bottom cover (2.1).
¾ Disconnect the connector (X2).
¾ Loosen the three (S2) screws and remove the grip cover (2.3).
¾ Loosen the two (S3) screws and remove the rear case (2.2).
¾ Loosen the nine (S4) screws and remove the mainboard shielding.
Closing the instrument
¾ Mount the mainboard shielding and fasten the nine (S4) screws.
Note that the shielding of wire-tree (W1) is reconnected again.
¾ Mount the rear case (2.2) and fasten the two (S3) screws.
¾ Mount the grip cover and fasten the three (S2) screws.
¾ Connect the connector (X2).
¾ Mount the top cover (2.4) and bottom cover (2.1).
¾ Fasten the six (S1) screws .
¾ Perform the quick verification test.
Refer to Chapter 2 “Adjustment”.
¾ Note: When detaching the connectors, proceed with caution.
Caution! Note that the connecting cables are still connected.
Fig. 3-5 Opening the instrument
1145.5973.82 3.10 E-5
Page 55
R&S FSH Module Replacement
Replacing the battery
¾ Open the instrument.
¾ Disconnect connector (X1).
¾ Replace the battery.
¾ Connect (X1).
¾ Close the instrument.
¾ Charge the battery.
¾ Perform the quick verification test.
Refer to Chapter 2 “Adjustment”.
¾Note: It is recommended that battery charging be performed with the ins trument switched OFF and
the AC power connected to the mains. The charging time for a full battery is about 4 hours.
X1
Fig. 3-6 Replacing the battery
1145.5973.82 3.11 E-5
Page 56
Module Replacement R&S FSH
Replacing the housing
Housing parts:
2.1: Bottom cover
2.2: Rear case
2.3: Grip cover
2.4: Top cover
Notes:When replacing the rear case, the existing type plate must be placed on the new rear
case, or the old series number must be written on the new type plate.
When the grip cover is replaced, the “input unit power/audio connections” have to be
placed in the new grip cover. See also Replacing the power/audio connections.
¾ Open the instrument.
¾ Replace the specific housing part.
¾ Close the instrument.
¾ Perform the quick verification test.
Refer to Chapter 2 “Adjustment”.
2.1
2.2
Type Plate
Fig. 3-7 Replacing the housing
2.3
2.4
1145.5973.82 3.12 E-5
Page 57
R&S FSH Module Replacement
Replacing the front unit for R&S FSH
¾ Open the instrument.
¾ Remove the battery .
¾ Remove the Main Unit:
¾ Disconnect the connectors (X3), (X4), and (X5).
¾ Remove the main unit by unscrewing the two (S5) screws.
¾ Remove the LCD colour module:
¾ Losen the four (S6) screws.
¾ Remove the LCD colour module.
¾ Use the new front unit to assemble the instrument again.
Before mounting the unit, make sure that no dust is present between the front unit and
the LCD colour module.
¾ Mount the LCD colour module with the four (S6) screws.
¾ Mount the Main Unit with the two (S5) screws.
¾ Connect the connectors (X3), (X4), and (X5).
¾ Mount the battery.
¾ Close the instrument.
¾ Perform the quick verification test.
Refer to Chapter 2 “Adjustment”.
S5
S5
S6
X4
X5
X3
X4
X5
S6
Main Unit
S6
Color LCD
Module
S6
X3
X6
Fig. 3-8 Replace Front Unit
1145.5973.82 3.13 E-5
Page 58
Module Replacement R&S FSH
Replacing the Color LCD Modul e
¾ Open the instrument.
¾ Remove the battery
¾ Remove the Main Unit:
¾ Disconnect the connectors (X3), (X4), and (X5).
¾ Remove the main unit by unscrewing the two (S5) screws.
¾ Remove the LCD colour module:
¾ Disconnect the connector (X6).
¾ Losen the four (S6) screws.
¾ Remove the LCD colour module.
¾ Use the new module to assemble the instrument again.
Before mounting the unit, make sure that no dust is present between the front unit and
the colour module.
¾ Mount the LCD colour module with the four (S6) screws.
¾ Mount the Main Unit with the two (S5) screws.
¾ Connect the connectors (X3), (X4), and (X5).
¾ Mount the battery.
¾ Close the instrument.
¾ Perform the quick verification test.
Refer to Chapter 2 “Adjustment”.
X5
S6
X4
S6
S6
LCD Retaining Plate
S6
X6
X6
X3
Fig. 3-9 Replacing the Color LCD Module
1145.5973.82 3.14 E-5
Page 59
R&S FSH Module Replacement
Replacing the RF/IF module
¾ Open the instrument.
¾ Disconnect the flat cable (X8) and remove the tape.
¾ Disconnect the connectors (X7) and (X9).
¾ Remove the RF/IF module by unscrewing (S7).
¾ Remove the binder and BNC connector block:
¾ Loosen the four (S8) screws.
¾ Remove the connector block.
¾ Mount the new RF/IF module.
¾ Mount the binder and BNC connector block with the four (S8) screws.
¾ Connect connectors (X7) and (X9).
¾ Mount the flat cable (X8), including the ferrite.
¾ Fasten the flat calbe with the tape.
¾ Close the instrument.
¾ Perform the manual adjustment.
Refer to Chapter 2 “Adjustment”.
S7
S8
S8
X8
S8
S8
Binder and BNC
Connector Block
Tape
X7
X9
Fig. 3-10 Replacing the RF/IF Module
1145.5973.82 3.15 E-5
Page 60
Module Replacement R&S FSH
Replacing the mainboard
The mainboard contains information about the instrument like the serial number. Special tools are
necessary to update this information after replacement of the mainboard. Therefore the exchange of the
mainboard is possible in a R&S Service Center, only.
¾ Open the instrument.
¾ Remove the battery.
¾ Loosen the two (S5) screws.
¾ Disconnect the connectors (X3), (X4), (X5), (X7), (X8) and (X9).
¾ Loosen the three screws (S11) and the remove the board.
Note that the two lower screws are isolated.
¾ Remove the distance screw (S12)
¾ Mount the new board and fasten (S11) and (S12).
¾ Connect connectors (X3), (X4), (X5), (X7), (X8) and (X9).
¾ Mount the Battery.
¾ Close the instrument.
¾ Perform the manual adjustment.
Refer to Chapter 2 “Adjustment”.
X9
X8
X7
S11
S11
S12
X7
X8
X5
X4
X3
S11
X1
S5
S5
Fig. 3-11 Replacing the Main Board
1145.5973.82 3.16 E-5
Page 61
R&S FSH Module Replacement
Replacing the N connector
¾ Open the instrument.
¾ Remove the battery.
¾ Remove the RF/IF module by unscrewing (S7).
¾ Disconnect the flat cable (X8).
¾ Disconnect the connectors (X7) and (X9).
¾ Remove the binder and BNC connector block:
¾ Loosen the four (S8) screws.
¾ Remove the connector block.
¾ Loosen the two screws (S9) from front RF housing for each N connector.
¾ Loosen the 9 screws (S10) from the RF housing.
¾ Remove the front RF housing.
¾ Clean the center contact of solder left from the N connector to be replaced.
¾ Loosen the other two screws (S9) from the appropriate N connector.
¾ Mount the new connector by first screwing it into the rear RF housing.
¾ Solder the center connection.
¾ Mount the front RF housing (S10).
¾ Fasten the two screws (S9) to the front RF housing for each the N connector.
¾ Mount the binder and BNC connector block with the (S8) screws.
¾ Mount the flat cable (X8), including the ferrite.
¾ Connect the connectors (X7) and (X9).
¾ Mount the RF/IF module (S7).
¾ Mount the Battery and close the instrument.
¾ Perform the manual adjustment.
Refer to Chapter 2 “Adjustment”.
S9
S9
S9
S9
S8
S8
S8
S9
Rear RF Housing
S9
Front RF Housing
Binder and BNC
Connector Block
X10
S10
S10
S10
S10
S10
Fig. 3-12 Replacing the N-Connector
1145.5973.82 3.17 E-5
Page 62
Module Replacement R&S FSH
Replacing the binder and BNC connector block
(See exploded view for references).
¾ Open the instrument.
¾ Disconnect the flat cable (X10).
¾ Disconnect the connector (X7).
¾ Remove the binder and BNC connector block:
¾ Loosen the four (S8) screws.
¾ Remove the connector block.
¾ Mount the binder and BNC connector block with the four (S8) screws.
¾ Connect the connectors (X7).
¾ Mount the flat cable (X10).
¾ Close the instrument.
¾ Perform the quick verification test.
Refer to Chapter 2 “Adjustment”.
S8
S8
X10
S8
S8
X7
Fig. 3-13 Replacing the Binder and BNC connector block
1145.5973.82 3.18 E-5
Page 63
R&S FSH Module Replacement
Replacing the power /audio connections
¾ Remove the top cover.
¾ Disconnect the connector (X2)
¾ Remove the connection wire tree from the grip cover.
¾ Mount the wire tree again.
¾ Mount the top cover.
¾ Perform the quick verification test.
Refer to Chapter 2 “Adjustment”.
X2
Fig. 3-14 Replacing the Power/ Audio Connections
1145.5973.82 3.19 E-5
Page 64
Module Replacement R&S FSH
Replacing a cable from the cable set
Note: The c able set is needed in the event that a cable is damaged during the replacement of
one of the modules.
Cables from the set:
¾ 10.1: 50-p
10.2: Flat flexible cable, 8 connections
10.3: Flat cable 22-p
For replacement instructions, refer to the individual modules.
10.1
Fig. 3-15 Cable set
10.2
10.3
1145.5973.82 3.20 E-5
Page 65
R&S FSH Troubleshooting
Troubleshooting
Malfunctions can have simple causes but can also be due to faulty components or modules.
These troubleshooting instructions can be used to locate causes of error down to the board level and to
return the instrument to operability by replacing boards.
We recommend that the instrument be shipped to our experts at the service centers (refer to address
list) for module replacement and further error correction.
Warning!Do not plug or unplug boards without first disconnecting the battery and
the AC Power Supply!
Note:When problems occur, first check whether any connections (cables, plug-in connections of
boards, etc) are damaged or incorrectly connected.
1145.5973.82 3.21 E-5
Page 66
Troubleshooting R&S FSH
Overview of errors, causes, and possible corrective actions
This section lists various errors, the probable module causing the problem, and the suggested corrective
action.
Troubleshooting problems in switching on the instrument
•Error: R&S FSH cannot be switched on.
Note: When the instrument is switched on, a beep is issued to indicate that the instrument has
started.
Troubleshooting procedure Possible cause of error and further steps
Verify that the AC power is present.
⇓
Press the On button for > 5 s.
⇓
Open the instrument and check the battery. ⇓ Voltage > 7.2 V.
Check the connectors from the AC power
supply: X2 and X7 (refer to section “Repair”).
•Error: Display remains dark although the beep indicated that the software was started.
Troubleshooting procedure Possible cause of error and further steps
Open the instrument and check X4 (backlight
connector).
Connect the adapter to the mains and wait several
minutes until the charger has recharged the battery.
This will force the instrument to perform a software reset
and a reset of the internal RAM. The instrument firmware will restart and all data will be reset.
Power connector broken.
Replace the power and audio connections.
Replace the mainboard (refer to “Replacing the
module”).
Backlight connection open or backlight converter
broken.
Connect again, or replace the mainboar d or LCD colour
module.
1145.5973.82 3.22 E-5
Page 67
R&S FSH Troubleshooting
•Error: Display has erroneous colours and characters.
Troubleshooting procedure Possible cause of error and further steps
Open the instrument and check X5 and X6
(LCD data).
•Error: Frequency response not compliant with specification.
This response can only be corrected at the service center. Replace the RF/IF module.
• Error: Level display very noisy.
Troubleshooting procedure Possible cause of error and further steps
Check the N connector.
⇓
Data connection broken, or circuitry on the mainboard
defective.
Connect again, or replace the mainboar d or LCD colour
module
The N connector is soiled.
Clean or replace the N connector.
Replace the RF/IF module.
•Error: Several keys on the keypad do not respond.
Troubleshooting procedure Possible cause of error and further steps
Check X3.
•Error: Power sensor does not respond properly.
Troubleshooting procedure Possible cause of error and further steps
Check X8 and X10.
The connection is not operational or the keypad is
broken.
Correct the connection, or replace the front unit.
The connection is not operating correctly, the binder
connector is broken, the mainboard is broken, or the
cables are broken.
Correct the connection.
Replace the binder and BNC connector block.
Replace the mainboard.
Replace any broken cable in the cable set.
1145.5973.82 3.23 E-5
Page 68
R&S FSH Installing New R&S FSH Software
4 Software Upd ates / Installing Options
This chapter provides information on software updates and how to install options on the R&S FSH.
Additional manuals supplied along with software/f irmware updates or with options obtained later can be
recorded here.
Installing New R&S FSH Software
A new firmware version can be installed via the R&S website. You can download the newest software
version, and the new software can be loaded onto the R&S FSH by using the setup program.
The instructions are included in the program.
Installing the Options
The following options are available with the R&S FSH:
Distance to Fault Measurement for R&S FSH
Remote Control via RS-232-C
Vector Transmission and Reflection Measurements
R&S FSH-B1
R&S FSH-K1
R&S FSH-K2
1145.5750.02
1145.3458.02
1145.3387.02
1145.5973.82 4.1 E-4
Page 69
R&S FSH Shipping of Instrument and Ordering of Spare Parts
5 Documents
This chapter provides information on how to order spare parts, and it also contains the spare parts list.
Shipping of Instrument and Ordering of Spare Parts
Please contact your Rohde & Schwarz support center or our spare parts ex press service if you need to
request service, repair your equipment, or order spare parts and modules.
The list of Rohde & Schwarz representatives and the addres s of our spare parts express service are
provided in the front section of this service manual.
You will need to provide the f ollowing infor m ation in order f or us to respond to your inquiries quick ly and
accurately and to determine whether the warranty for your instrument is still valid:
• Instrument model
• Serial number
• Detailed error description in case of repair
• Contact partner for checkbacks
Shipping of instrument
When shipping the instrument, be sure to provide sufficient mechanical and anti-static protection:
¾ Repack the instrum ent as it was originally packed. The antis tatic packing foil prevents unintentional
electrostatic charging from occurring.
¾ If you do not use the original packaging, include sufficient padding to prevent the instrument from
slipping inside the package. Wrap antistatic packing foil around the instrum ent to protec t it f r om electrostatic charging.
Shipping of a module
When shipping a module, be sure to provide sufficient mechanical and antistatic protection:
¾ Ship the module in a sturdy, padded box.
¾ Wrap the board in antistatic foil.
If the packaging is antis tatic but not conduc tive, additional conductive pac k aging is requir ed. The additional packaging is not required if the enclosed packaging is conductive.
1145.5973.82 5.1 E-5
Page 70
Shipping of Instrument and Ordering of Spare Parts R&S FSH
Ordering spare parts
To deliver replacement parts promptly and correctly, we need the following information:
• R&S order number (refer to the spare part lists in this chapter)
• Designation
• Number of units
• Instrument type for the replacement part
• Contact person for possible questions
The R&S order number to be used when ordering replacement parts and modules as well as power
cables can be found further below.
Refurbished modules
¾ Ref ur bis hed modules are an economical alter native to original modules. It should be kept in m ind that
refurbished modules ar e not new, but repaired and fully tested parts. T hey may have signs of use but
they are electrically and mechanically equivalent to new modules.
¾ To find out which refurbished m odules are available, pleas e c ontac t your Rohde & Schwarz represen-
tative (or the central service division at Rohde & Schwarz in Munich).
Return of defective replaced modules
¾ Defective modules of the replacement program that can be repaired may be returned within 3
months after delivery of the replaced module. A repurchasing value is credited.
¾ Excluded ar e parts that cannot be r epaired, e.g. PCBs that are burned, br oken or dam aged by repair
attempts, incomplete modules, or parts that have endured heavy mechanical damage.
¾ Defective parts must be sent back with an accompanying document of ret urned items containing
the following information:
• R&S order number, serial number and designation of the removed part
• Precise description of the error
• R&S order number, serial number and designation of the instrument the part was removed from
• Date of part removal
• Name of the technician who exchanged the part
¾ A document of returned items is provided along with each replacement module.
1145.5973.82 5.2 E-5
Page 71
R&S FSH Spare Parts
Spare Parts
The R&S Order numbers necessary for order ing replacement parts and modules c an be found in the
spare part lists provided below.
List of R&S FSH spare parts
The following table lists available spare parts together with their R&S order numbers.
Reference Part R&S Order Number
1 Battery Pack for R&S FSH
(R&S FSH-Z32)
2 Housing R&S FSH without top holster 1157.3258.00
Top holster for FSH without tracking genera-
4
5
6 Mainboard for R&S FSH 1157.3570.00
7 N connector 1157.3235.00
8 Interconnection board 1157.3587.00
9 Input unit (power and audio connectors, in-
10 Set of cables for R&S FSH 1157.3329.00
21 AC mains adapter for R&S FSH
22 AC mains adapter for R&S FSH
23 AC mains adapter for R&S FSH
AC mains adapter for R&S FSH
tor
Top holster for FSH with tracking generator 1157.3493.00
Front unit for R&S FSH3 1157.3241.00 3
Front unit for R&S FSH6 1300.7591.00
LCD module 1157.3229.00
LCD plane for FSH3 1300.7704.00
LCD plane for FSH6 1300.7710.00
RF/IF module for R&S FSH3 without tracking
generator
RF/IF Module for R&S FSH3 with tracking
generator
RF/IF Module for R&S FSH6 without tracking
generator
RF/IF Module for R&S FSH6 with tracking
generator
cluding wire tree)
(EU Version)
(UK Version)
(US Version)
(AUS Version)
1145.5796.02
1157.3487.00 2.4
1157.3606.00
1157.3612.00
1300.7604.00
1300.7610.00
1157.3270.00
1157.3293.00
1157.3306.00
1157.3312.00
1157.3370.00
1145.5973.82 5.3 E-5
Page 72
Spare Parts R&S FSH
Note: The reference can be found in the exploded drawing in Chapter 3.
Important Note!
When replacing a module, please pay car eful attention to the safety instructions
and the repair instructions provided in c hapter 3 and at the beginning of this service manual.
When shipping a module, be sure to provide s ufficient mechanical and antistatic
protection.
1093.4820.82 5.4 E-5
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