Rohde and Schwarz SMR20 Specifications Sheet

Microwave Signal Generator SMR

High-performance, cost-effective and reliable up to 40 GHz

◆ Instrument family with four models

– SMR20 (10 MHz to 20 GHz)
– SMR27 (10 MHz to 27 GHz)
– SMR30 (10 MHz to 30 GHz)
– SMR40 (10 MHz to 40 GHz)

◆ Standard version:

CW generator with pulse modulation
and digital frequency sweep

◆ Easily upgradeable to AM/FM signal

generator and synthesized sweep
generator with analog ramp sweep
thanks to flexible options concept

◆ Optional pulse generator for radar

and EMC applications

◆ Optional IF input for upconversion of

digitally modulated IF signals

◆ Compact, lightweight, user-friendly:

ideal in the lab and for field applica­tions

◆ 3-year calibration cycle

The allrounder – designed for future–proofness

Maximum ease of operation

◆ High-contrast LC display

◆ Online help including IEC/IEEE-bus

commands

◆ Simple and self-explanatory settings

◆ User-assignable keys

◆ One-hand operation with EasyWheel

Wide frequency range

◆ SMR20 (1 GHz to 20 GHz)

◆ SMR27 (1 GHz to 27 GHz)

◆ SMR30 (1 GHz to 30 GHz)

◆ SMR40 (1 GHz to 40 GHz)

◆ Optional extension of lower frequency

limit to 10 MHz (SMR-B11)

◆ Frequency resolution 1 kHz,

optional 0.1 Hz (SMR-B3)

High output power

◆ SMR20 >+10 dBm (at 20 GHz)

◆ SMR27

◆ SMR30/40

>+11 dBm (at 27 GHz)

>+9 dBm (at 30/40 GHz)

High-precision level control

◆ High-precision, frequency-response-

compensated level control

◆ Setting range extendible to −130 dBm

by means of RF attenuator option
(SMR-B15/-B17)

Three instruments in one

◆ CW generator with pulse modulation

capability (standard version)

◆ Signal generator with AM/FM and

LF generator (option SMR-B5)

◆ Synthesized sweep generator with

analog ramp sweep (option SMR-B4)

Optional pulse generator
(SMR-B14)

◆

Operating modes: single pulse, double
pulse, externally triggered, gate mode

◆ Pulse repetition 100 ns to 85 s

◆ Pulse width 20 ns to 1 s

Sweep capabilities

◆ Digital RF and level sweep

(standard version)

◆ Analog ramp sweep

(RF sweep, option SMR-B4)

◆ Max. sweep rate for ramp sweeps

min. 600 MHz/ms
(frequency >2GHz)

◆ Digital sweep of LF generator

(with option SMR-B5)

◆ 10 freely selectable frequency

markers for RF sweep

◆ Operating modes: automatic, single-

shot, manual, externally triggered

Optional IF input
(SMR-B23/SMR-B24/SMR-B25)

◆ Built-in upconverter for digitally

modulated IF signals (SMR-B23/-B24:
DC to 700 MHz, SMR-B25: 40 MHz to
6 GHz for SMR 20 only)

◆ Ideal for use with Vector Signal

Generator SMIQ and I/Q Modulation
Generator AMIQ

2 Microwave Signal Generator SMR

CW, signal or synthesized sweep generator

Memory

◆ Space for 50 complete instrument

setups

SMR as CW generator

The SMR family comprises four basic
models designed as CW generators with
pulse modulation capability. The four
models have a common lower frequency
limit of 1 GHz and provide frequency cov­erage up to 20 GHz (SMR20), 27 GHz
(SMR27), 30 GHz (SMR30) and 40 GHz
(SMR40). The lower limit can be
expanded to 10 MHz by the optional
Frequency Extension 0.01 GHz to 1 GHz
(SMR-B11).

High-precision output level

Microwave signal generators are fre­quently used for calibrating test receivers.
This task calls for a highly accurate and
stable output level settable with high reso­lution. This is ensured by a high-precision,
frequency-response-compensated level

control for levels higher than –20 dBm. The
setting range can be extended to –130 dB
with the optional RF Attenuator SMR-B15
or SMR-B17.

Stable output frequency

The crystal reference built in as standard
ensures an accurate, low-drift output fre­quency. The SMR can be fitted with the
optional OCXO Reference Oscillator
SMR-B1 to satisfy the most stringent
requirements on accuracy and aging.

Application-oriented frequency resolution

The standard frequency resolution of
1 kHz of the SMR offers a comfortable
margin for most applications, for example
frequency response measurements in the
laboratory and in production and servic­ing. To satisfy more stringent require­ments, e.g. for scientific applications and
research, the SMR-B3 option is available
to improve frequency resolution to 0.1 Hz.

Pulse modulator included

Pulse modulation is still the most impor­tant modulation mode for microwave
applications. Each of our basic units is,
therefore equipped with a high-quality
pulse modulator. The on/off ratio is better
than 80 dB, the rise/fall time shorter than
12 ns. Pulse widths of up to 25 ns are pos­sible.

Offering an excellent price/performance
ratio, each of the four basic models is
ideal for the user wishing to enter the
field of microwave testing at an afford­able price. Should the measurement
tasks become more demanding, the basic
models can be upgraded any time by
means of options to give an AM/FM sig­nal generator or a synthesized sweep
generator featuring fast, fully synthe-

High output level saves you real cash

All microwave test setups involve high
losses caused by the use of long cables,
power dividers, directional couplers and
RF relays. Expensive microwave amplifi­ers are usually the only means to remedy
this. But not with the SMR: the high out­put power provided by all models elimi­nates the need for such a costly compo­nent.

These guaranteed values illustrate that
the SMR is the ideal generator for use in
the development, production and mainte­nance of radar equipment.

sized, analog ramp sweep.

dBc/Hz

Excellent spectral purity

The SMR stands out from other genera­tors for its excellent spectral purity.
Advanced frequency synthesis with frac­tional-N divider makes for low SSB phase
noise and high spurious suppression,
both of which are for example prerequi­sites for reliable receiver measurements.
Modern microwave filters in the output
path of the instrument ensure excellent
harmonics suppression. This is necessary
to obtain conclusive results in scalar net­work analysis measurements.

–40.0

–50.0

–60.0

–70.0

–80.0

–90.0

–100.0

–110.0

–120.0

–130.0

–140.0

SSB phase noise at 10 GHz

2 4 68 2 4 68 2 4 68 2 4 68 2 4 68

10 Hz 100 Hz 1 kHz 10 kHz 100 kHz 1 MHz

Microwave Signal Generator SMR 3

P/dBm

24
22

20

18

16

14

12

10

8

6

4

0.01 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

Typical max. output level as a function of frequency (with options SMR-B15 and SMR-B17)

Pulse generator option

The optional Pulse Generator SMR-B14 is
an ideal complement to the pulse modu­lator. It generates single and double
pulses with pulse frequencies up to

SMR 20

SMR 27/30/40

SMR 30/40

SMR 40

SMR 27/30/40

f/GHz

with AM and FM modulation capability.
The option also includes an LF generator
for sinewave and squarewave signals
from 0.1 Hz to 10 MHz.

FM and FSK

The FM modulator has a modulation
bandwidth from DC to 5 MHz. Digital fre­quency shift keying (FSK) is possible with
data rates from 0 Hz to 2 MHz.

Simultaneous modulation modes

All modulation modes of the SMR can be
combined. This allows the generation of
complex modulation signals for modern
communication and location systems.
The combination of pulse modulation and
FM simulates Doppler effects or chirp sig­nals. Simultaneous AM and pulse modu­lation provides the types of signal occur­ring in pulse radar applications with
rotating antenna. The combination of FM
and AM can be used to check fading
effects of FM receivers.

10 MHz. The pulse generator can also be
triggered externally and operated in the
external gate mode. The pulse width and
delay are freely selectable over a wide
range.

Digital frequency and level sweeps

The digital frequency sweep with step
times from 10 ms allows convenient fre­quency response measurements on
microwave circuits. The start and stop fre­quencies are freely selectable. A trigger
input enables synchronous operation
with external equipment.

The 20 dB level sweep allows, for exam­ple, amplifier or mixer compression to be
determined.

SMR as signal generator

AM/FM/Scan modulator option

The optional AM/FM/Scan Modulator
SMR-B5 added to the basic models turns
them into fully-fledged signal generators

–3 dB

–60 dB

600 MHz/ms

-3 dB

-60 dB

Spectrum or scalar network analyzer

X output

X input

DUT

600 MHz/ms

4 Microwave Signal Generator SMR

Network analysis with SMR as synthesized
sweep generator

SMR as synthesized sweep
generator

3

Analog ramp sweep option

The analog ramp sweep mode corre­sponds to the analog sweep of classic
sweep generators except that the sweep
is fully synchronized over the complete
range. In this way, the excellent fre­quency accuracy of digital step sweeps is
achieved on the whole, and this at much
higher sweep rates of min. 600 MHz/ms
from 2 GHz on.

In conjunction with scalar network ana­lyzers or suitable spectrum analyzers,
realtime adjustment of microwave filters
can be performed, for example.

To mark important frequency ranges such
as filter bandwidths or the position of
attenuation poles, the SMR has 10 user­selectable frequency markers which can
be output as pulse markers at the marker
output (TTL level) or alternatively modu­lated on the RF level as level markers
(level reduction of 1 dB).

The use of the SMR in conjunction with a
scalar network or spectrum analyzer is
illustrated by the figure at the bottom of
page 4.

Internal
synthesizer

Without SMR-B23/-B24/-B25

With SMR-B23/-B24/-B25

Mechanical RF relays

LO RF

Step
Attenuator
SMR-B15/-B17

IF

SIGNAL GENERATOR

FRE

Q

100. 000 000 0

STATE

FREQUENCY

LEVEL

POWER RAMP CONTROL

ANALOG

MO

D

VECTOR MO

D

----- Global for VECTOR MO

DIGITAL MO

D

IMPAIRMENT

DIGITAL STD

LEAKAG

LF OUTPU

T

IMBALANCE

SWEE

P

QUADRATURE OFF

LIST

IQ SWAP

MEM SEQ

UTILITI

ES

CALIBRATE

STBY

ON

300kHz ... 3.3GHz SMIQ 03 1084.8004.03

MHzLEVEL

D + DIGITAL MOD +

STATE

E

SET

QUICK SELECT

MENU 1ASSIGN MENU 2

O
O

DIGITAL STD --------

O

NORM

- 30.0

FF EXT_ANALOG

FF

FF

ON

ON

INV

dBm

0 %
0 %
0 d

PRESET LOCALERROR

DATA INPUT

FREQ

89

7

LEVEL

456

SAVE

23

1

.

RCL

0

MENU / VARIATION

RETURN SELECT

eg

HELPSTATUS

SMR as upconverter for digitally modulated signals

SMR as upconverter

IF input option

Vector signal generators like the SMIQ
generate all types of digitally modulated
signals up to 6.4 GHz. To generate signals
up to 40 GHz, the SMR offers upconver­sion capability by means of the IF input
option. A typical application is shown by
the figure above. The I/Q Modulation
Generator AMIQ supplies the I and Q sig­nals (1) for modulating the Vector Signal
Generator SMIQ.

2

DATA

G

dB V

n

BIT
CLOCK

M

V

k

mV

m

SYMBOL

CLOCK

x

­1

dB (m)

ENTER

.

I

Q

Ω

RF 50

MOD

RF

ON/OFF

ON/OFF

MAX 50 W

MADE IN GERMANY

REVERSE POWER

1

I-Kanal

Q-Kanal

The modulated RF signal of the SMIQ (2)
is applied directly to the IF input of the
SMR. At the RF output of the SMR, the
converted, digitally modulated signal of
the SMIQ is brought out (3). In the exam­ple illustrated above, the selective circuits
of the DUT separate the wanted signal
from unwanted components generated
during upconversion.

Alternatively, suitable external bandpass
filters can be used.

Microwave Signal Generator SMR 5

EasyWheel – the trick with the click

Transparent menu structure

The EasyWheel makes it extremely simple
to operate the SMR user interface.

Turn

Just turn the wheel to go to the next
menu item, then press the wheel to per­form the desired function.

There is no easier way to operate a mea­suring instrument!

Click

Click

Turn

6 Microwave Signal Generator SMR

Specifications

Maximum level with option SMR-B23/-B24/-B25, normal mode (IF input

3)

off)

The specifications are guaranteed under the following conditions:
warmup time 30 minutes, specified environmental conditions met, calibration
cycle adhered to and total calibration performed.
Data designated "nom." apply to design parameters and are not tested. Data des­ignated "overrange" or "underrange" are not guaranteed.

Frequency range

SMR20

Without option SMR-B11
With option SMR-B11

1 GHz to 20 GHz
10 MHz to 20 GHz

SMR27

Without option SMR-B11
With option SMR-B11

1 GHz to 27 GHz
10 MHz to 27 GHz

SMR30

Without option SMR-B11
With option SMR-B11

1 GHz to 30 GHz
10 MHz to 30 GHz

SMR40

Without option SMR-B11
With option SMR-B11

1 GHz to 40 GHz
10 MHz to 40 GHz

Resolution

Without option SMR-B3
With option SMR-B3

Setting time (to within <1 x 10

–6

)

1 kHz

0.1 Hz

after IEC/IEEE-bus delimiter <10 ms + 2 ms/GHz

Reference frequency Standard Option SMR-B1

Aging (after 30 days of operation) 1 x 10
Temperature effect (0°C to 55°C) 2 x 10

–6

/year <1 x 10–7/year

–6

<1 x 10

–10

/°C
Warmup time – 15 min
Output for internal reference

Frequency

(EMF, sinewave)

Level, V

rms

Source impedance

10 MHz
1 V
50 Ω

Input for external reference

Frequency
Permissible frequency drift
Input level, V
Input impedance

rms

10 MHz

–6

3 x 10

0.1 V to 2 V
50 Ω

Spectral purity

Spurious signals
Harmonics

f ≤20 GHz
f >20 GHz

1)

2)

<–55 dBc
<–40 dBc

Subharmonics

f ≤20 GHz
f >20 GHz

<–65 dBc
<–30 dBc

Nonharmonics

f ≤20 GHz
f >20 GHz

<–60 dBc
<–54 dBc

SSB phase noise
(f = 10 GHz, 10 kHz from carrier,
1 Hz bandwidth, CW, FM off) <–83 dBc
Residual FM, rms (f = 10 GHz, FM off)

0.3 kHz to 3 kHz

0.03 kHz to 20 kHz

3)

Level
Maximum level without option SMR-B23/-B24/-B25

<20 Hz
<200 Hz

3)

Frequency range SMR20 SMR27/SMR30/SMR40

Without option
SMR-B15

With option
SMR-B15

Without option
SMR-B15/-B17

With option
SMR-B15/-B17

0.01 GHz to <1 GHz >+13 dBm >+12 dBm
1 GHz to <18 GHz >+11 dBm >+10 dBm >+8 dBm >+7 dBm
18 GHz to 20 GHz >+10 dBm >+8 dBm >+7 dBm >+5 dBm

>20 GHz to 27 GHz ––>+11 dBm >+9 dBm
>27 GHz to 30 GHz ––>+9 dBm >+7 dBm
>30 GHz to 40 GHz ––>+9 dBm >+7 dBm

Frequency range SMR20 SMR27/SMR30/SMR40

Without option
SMR-B15

With option
SMR-B15

Without option
SMR-B15/-B17

With option
SMR-B15/-B17

0.01 GHz to <1 GHz >+13 dBm >+12 dBm
1 GHz to <18 GHz >+10 dBm >+9 dBm >+7 dBm >+6 dBm
18 GHz to 20 GHz >+8 dBm >+6 dBm >+5 dBm >+3 dBm

>20 GHz to 27 GHz ––>+8 dBm >+6 dBm
>27 GHz to 30 GHz ––>+6 dBm >+4 dBm
>30 GHz to 40 GHz ––>+6 dBm >+4 dBm

Minimum level of all models

Without option SMR-B15/-B17

−20 dBm
(underrange <−20 dBm)

With option SMR-B15/-B17

−130 dBm

Resolution 0.1 dB or 0.01 dB,

selectable

Total deviation (level = 0 dBm)

Frequency response (level = 0 dBm)

f ≤20 GHz
f >20 GHz

f ≤20 GHz
f >20 GHz

4)

<1 dB
<1.4 dB

5)

<0.5 dB, <0.3 dB typ.
<0.7 dB, <0.4 dB typ.

Impedance 50 Ω
SWR <2
Setting time after IEC/IEEE-bus delimiter

<10 ms
With option SMR-B15/-B17, with switching
in attenuator

Range for non-interrupting level setting 20 dB (overrange >20 dB)
Residual level

6)

with switchoff via RF OFF
Without option SMR-B15/-B17
With option SMR-B15/-B17

<25 ms

nom. <–70 dBm
nom. <–140 dBm

Linear amplitude modulation with option SMR-B5

Operating modes internal, external AC/DC
Modulation depth
Resolution 0.1%
Setting accuracy
AM distortion

7)

(AF = 1 kHz, m <80%)

8)

8)

0% to 100 %

<4% of reading + 1%

(f >50 MHz, AF = 1 kHz, m = 60%)

f <1 GHz
f ≥1 GHz

Modulation frequency response (m = 60%)

<3%
<1%

8)

f <1 GHz

DC to 50 kHz

<3 dB

f ≥1 GHz

20 Hz to 20 kHz
DC to 50 kHz

<1 dB
<3 dB

Incidental PM with AM, peak value (AF = 1 kHz,
m = 30%) <0.4 rad
EXT1, EXT2 modulation input
Input impedance
Input voltage V

for selected modulation depth

p

50 Ω/600 Ω
1 V (high/low indication for
inaccuracy >3%)

9)

or 100 kΩ

Logarithmic amplitude modulation with option SMR-B5 (SCAN AM)

Operating modes internal, external
Dynamic range 30 dB (overrange >30 dB)
Sensitivity ±0.1 dB/V to ±10 dB/V
Resolution 0.01 dB
Rise/fall time (10%/90 %) <10 µs
EXT1, EXT2 modulation input

Input impedance
Input voltage range

50 Ω/600 Ω
–6 V to +6 V

9)

or 100 kΩ

Microwave Signal Generator SMR 7

Frequency modulation with option SMR-B5

Operating modes internal, external AC/DC
Maximum deviation

≤15.625 MHz
>15.625 MHz to 31.25 MHz
>31.25 MHz to 62.5 MHz
>62.5 MHz to 125 MHz
>125 MHz to 250 MHz
>250 MHz to 500 MHz
>500 MHz to <1 GHz

1 GHz to <2 GHz
2 GHz to 10 GHz

>10 GHz to 20 GHz
>20 GHz

39.0625 kHz

78.125 kHz

156.25 kHz

312.5 kHz
625 kHz

1.25 MHz

2.5 MHz
5 MHz
10 MHz
20 MHz

40 MHz
Resolution <1%, min. 10 Hz
Setting accuracy (AF = 1 kHz) <5 % of reading + 20 Hz
FM distortion (AF = 1 kHz, half max. deviation) <0.5%
Modulation frequency range DC to 5 MHz
Modulation frequency response <3 dB
Carrier frequency offset with FM

≤15.625 MHz
>15.625 MHz to 31.25 MHz
>31.25 MHz to 62.5 MHz
>62.5 MHz to 125 MHz
>125 MHz to 250 MHz
>250 MHz to 500 MHz
>500 MHz to <1 GHz

1 GHz to <2 GHz
2 GHz to 10 GHz

>10 GHz to 20 GHz
>20 GHz

EXT1, EXT2 modulation input
Input impedance
Input voltage V

for selected deviation

p

0.39063 Hz + 1% of deviation

0.78125 Hz + 1% of deviation

1.5625 Hz + 1% of deviation

3.125 Hz + 1% of deviation

6.25 Hz + 1% of deviation

12.5 Hz + 1% of deviation

25 Hz + 1% of deviation

50 Hz + 1% of deviation

100 Hz + 1% of deviation

200 Hz + 1% of deviation

400 Hz + 1% of deviation

9)

50 Ω/600 Ω

or 100 kΩ
1 V (high/low indication for
inaccuracy >3%)

On/off ratio (10%/90 %)

62.5 MHz to 125 MHz

>125 MHz to 450 MHz
>450 MHz

<50 ns
<20 ns
<12 ns

10)

10)

10)

Minimum pulse width

With level control on
(ALC ON)
With level control off
(ALC OFF)

500 ns

25 ns

Maximum pulse pause

With level control on
(ALC ON)

40 ms
With level control off
(ALC OFF)

any

Minimum pulse/pause ratio

With level control on
(ALC ON)

1/100
With level control off
(ALC OFF)

any

Maximum pulse repetition frequency

62.5 MHz to 125 MHz

>125 MHz to 450 MHz
>450 MHz

1 MHz

2 MHz

10 MHz

Pulse delay 50 ns typ.
Video feedthrough V
PULSE modulation input

pp

Input level

<20 mV

TTL/HCT signal or selectable

switching thresholds
Input impedance

at +0.5 V or –2.5 V

50 Ω (max. 2 W, overload pro-

tection) or 10 kΩ

Simultaneous modulation

FM (FSK) is independent of AM (SCAN AM, ASK) and pulse modulation. Reduced
AM bandwidth for simultaneous AM (SCAN AM, ASK) and pulse modulation

11)

ASK modulation with option SMR-B5

Operating modes external
Maximum modulation depth 90 %
Resolution 0.1%
Data rate 0 Hz to 200 kHz
Rise/fall time (10%/90 %) <10 µs
EXT1 modulation input

Input impedance
Input level

50 Ω/600 Ω
TTL/HCT signal, selectable

9)

or 100 kΩ

polarity

FSK modulation with option SMR-B5

Operating modes external
Maximum deviation

≤15.625 MHz
>15.625 MHz to 31.25 MHz
>31.25 MHz to 62.5 MHz
>62.5 MHz to 125 MHz
>125 MHz to 250 MHz
>250 MHz to 500 MHz
>500 MHz to <1 GHz

1 GHz to <2 GHz
2 GHz to 10 GHz

>10 GHz to 20 GHz
>20 GHz

39.0625 kHz

78.125 kHz

156.25 kHz

312.5 kHz
625 kHz

1.25 MHz

2.5 MHz
5 MHz
10 MHz
20 MHz

40 MHz
Data rate 0 Hz to 2 MHz
Rise/fall time (10%/90 %) <10 µs
EXT1 modulation input

Input impedance
Input level

50 Ω/600 Ω

TTL/HCT signal, selectable

9)

or 100 kΩ

polarity

Pulse modulation

Operating modes external, internal with option

SMR-B14
On/off ratio >80 dB

SMR-B23/-B24/-B25 IF input option

SMR-B23 SMR-B24 SMR-B25

IF input

Frequency range
Level
Frequency response
SWR

DC to 700 MHz

<0 dBm
<5 dB
<2

DC to 700 MHz

<0 dBm
<7 dB
<2

40 MHz to 6 GHz

<0 dBm
<7 dB
<2

RF output

Frequency range
LO level
SWR

1 GHz to 20 GHz

<–6 dBm
<2

2 to 27/30/40 GHz

<–3 dBm
<2

1 GHz to 20 GHz

<0 dBm
<2

Conversion loss (IF in­put/RF output)

With option
SMR-B15/-B17

11)

3 dB to 18 dB

3 dB to 23 dB

3 dB to 23 dB
Without option
SMR-B15/-B17

3 dB to 16 dB

3 dB to 19 dB

3 dB to 19 dB

LF generator with option SMR-B5

Frequency range
Resolution
Waveforms sinewave, squarewave
Frequency drift <1 x 10

0.1 Hz to 10 MHz

0.1 Hz

-4

Frequency response (up to 500 kHz) <0.5 dB
Distortion (up to 100 kHz) <0.5% (R

Open-circuit voltage V
Resolution
Setting accuracy (at 1 kHz, V
Output impedance approx. 10 Ω

(LF connector)

p

= 1 V)

p

>200 Ω,

L

level = 0.5 V)
40 mV to 4 V
1 mV

1.5%

Frequency setting time
(after IEC/IEEE-bus delimiter) <10 ms

Microwave Signal Generator SMR 8

SMR-B14 pulse generator option

Operating modes single or double pulse (auto-

matically or externally trig­gered), delayed pulse (exter­nally triggered), gate mode

(external)
Active trigger edge positive or negative
Pulse repetition period

Resolution
Accuracy

Pulse width

Resolution
Accuracy

Pulse delay

Resolution
Accuracy

Double pulse

Resolution

Accuracy
Trigger delay
Jitter

100 ns to 85 s
5 digits, min. 20 ns

−4

<1 x 10

20 ns to 1 s
4 digits, min. 20 ns

−4

+ 3 ns

<1 x 10
20 ns to 1 s
4 digits, min. 20 ns

−4

+ 3 ns

<1 x 10
60 ns to 1 s
4 digits, min. 20 ns

−4

+ 3 ns

<1 x 10
50 ns typ.
<10 ns

PULSE modulation input

Input level

TTL/HCT signal or selectable
switching thresholds

Input impedance

at +0.5 V or –2.5 V
50 Ω (max. 2 W, overload pro­tection) or 10 kΩ

SYNC output TTL/ACT signal, (R

40 ns pulse width

PULSE/VIDEO output TTL/ACT signal (R

≥50 Ω),

L

≥50 Ω)

L

Digital sweep, sweep in discrete steps

RF sweep, AF sweep

Operating modes

automatic, single-shot, manu­al or externally triggered,

linear or logarithmic
Sweep range
Step width (lin)
Step width (log)

freely selectable

freely selectable

0.01% to 100%

Level sweep

Operating modes

automatic, single-shot, manu-

al or externally triggered, loga-

rithmic
Sweep range
Step width

Step time
Resolution

0 dB to 20 dB

0.01 dB to 20 dB

10 ms to 5 s

0.1 ms
Markers 10, freely selectable
MARKER output signal TTL level, selectable polarity
X output 0 V to 10 V
BLANK output signal TTL level, selectable polarity

SMR-B4 ramp sweep option

RF sweep

Operating modes

automatic, single-shot, manu­al or externally triggered start/

stop, center frequency/span
Sweep range
Resolution
Accuracy

freely selectable

1 kHz

(0.005% (of deviation)/(sweep

time/s) + reference error

Sweep time 10 ms to 100 s (switchover

time ≤30 ms at 1 GHz, 2 GHz,

10 GHz and 20 GHz)

Max. sweep rate

≤15.625 MHz
>15.625 MHz to 31.25 MHz
>31.25 MHz to 62.5 MHz
>62.5 MHz to 125 MHz
>125 MHz to 250 MHz
>250 MHz to 500 MHz
>500 MHz to <1 GHz

1 GHz to <2 GHz
2 GHz to 10 GHz

>10 GHz to 20 GHz
>20 GHz

2.34375 MHz/ms

4.6875 MHz/ms

9.375 MHz/ms

18.75 MHz/ms

37.5 MHz/ms
75 MHz/ms
150 MHz/ms
300 MHz/ms
600 MHz/ms
1200 MHz/ms

2400 MHz/ms
MARKER output signal TTL level, selectable polarity
X output 0 V to 10 V
BLANK output signal TTL level, selectable polarity

List mode frequency and level values

can be stored in a list and will

be set fast
Permissible level variation 20 dB
Operating modes auto, single-shot, manual/

external trigger
Maximum number of channels 2003
Step time
Resolution

10 ms to 5 s

0.1 ms

Memory for instrument setups

Storable setups 50

Remote control

System IEC625 (IEEE 488)
Command set SCPI 1995.0
Connector 24-contact Amphenol
IEC/IEEE-bus address 0 to 30
Interface functions SH1, AH1, T6, L4, SR1, RL1,

PP1, DC1, DT1, C0

1)

SMR20: level <+5 dBm without or <+3 dBm with option SMR-B23 or SMR-B25;
SMR27/30/40: level <+2 dBm without or <+0 dBm with option SMR-B24.

2)

Specifications for harmonics above 20 GHz (SMR20), 27 GHz (SMR 27), 30 GHz (SMR30) and
40 GHz (SMR40) only typical.

3)

With option SMR-B19/-B20 the maximum level is likely to be reduced by up to 0.1 dB/GHz. The
maximum level is reduced by up to –2 dB in the temperature range 35 °C to 55 °C.

4)

From 10 MHz to 50 MHz, the specified total deviation is only valid in the temperature range
15°C to 35 °C. The deviation outside this temperature range is likely to be higher by max.

0.7 dB.

5)

From 10 MHz to 50 MHz, the specified frequency response is only valid in the temperature
range 15°C to 35 °C.

6)

Residual level at set RF.

7)

The modulation depth adjustable within the AM specifications continuously decreases from
6 dB below the maximum level up to the maximum level.

8)

This specification does not apply
a) to non-interrupting level setting (ATTENUATOR MODE FIXED) if option SMR-B15/-B17 is
used,
b) to levels below –7 dBm without option SMR-B15/-B17,
c) to external level control mode (EXT ALC).

9)

50 Ω or 600 Ω selectable by means of internal jumpers.

10)

Only valid if level control set to OFF (ALC OFF).

11)

Option SMR-B15/-B17 in 0 dB position. The conversion loss can be increased by 10 dB to 110 dB
in 10 dB steps using option SMR-B15/-B17. With option SMR-B19/-B20, the conversion loss is
increased by up to 0.1 dB/GHz.

Microwave Signal Generator SMR 9

General data

Temperature resistance

Rated temperature range

Storage temperature range

Climatic resistance

Damp heat 95% relative humidity, cyclic

Mechanical resistance

Vibration, sinusoidal

Vibration, random

Shock

Electromagnetic compatibility

Leakage (carrier frequency <1 GHz) <0.1 µV (induced in a two-turn

Radiated susceptibility 10 V/m
Power supply 100 V to 120 V (AC), 50 to 400 Hz

Safety standards DIN EN61010-1, IEC1010-1,

Conformity marks VDE-GS, CSA, NRTL/C
Dimensions (W x H x D) 427 mm x 88 mm x 450 mm
Weig ht <12 kg when fully equipped

0°C to +55°C; meets IEC 68-2-1
and IEC68-2-2
–40°C to +70°C

test at +25°C/+40°C, meets
IEC68-2-3

5 Hz to 150 Hz, max. 2 g at 55 Hz,
55 Hz to 150 Hz, 0.5 g const.;
meets IEC68-2-6, IEC 1010-1
and MIL-T-28800D class 5
10 Hz to 300 Hz, acceleration

1.2 g (rms)
40 g shock spectrum,

meets
MIL-STD-810D, MIL-T-28800D,
class 3/5
meets

EN50081-1 and
EN50082-1 (EMC directive of
EU)

coil 25 mm in diameter at a
distance of 25 mm from any sur­face of the enclosure)

200 V to 240 V (AC), 50 to 60 Hz,
autoranging,
max. 200 VA

UL3111-1, CSA22.2 No. 1010-1

Ordering information

Order designation Type Order No.

Signal Generator

1 GHz to 20 GHz
1 GHz to 27 GHz
1 GHz to 30 GHz
1 GHz to 40 GHz

Accessories supplied

Power cable, operating manu­al, adapter

3.5 mm, female

2.9 mm, female

Options

OCXO Reference Oscillator SMR-B1 1104.5485.02
Frequency Resolution 0.1 Hz SMR-B3 1104.5585.02
Ramp Sweep SMR-B4 1104.5685.02
AM/FM/Scan Modulator SMR-B5 1104.3501.02
Frequency Extension

0.01 GHz to 1 GHz
Pulse Generator SMR-B14 1104.3982.02
RF Attenuator 20 GHz
(SMR20/27)
RF Attenuator 40 GHz
(SMR30/40)
Rear Connectors for RF, AF
(SMR20/27)
Rear Connectors for RF, AF
(SMR30/40)
IF Input 20 GHz (SMR20)
IF Input 40 GHz (SMR27/30/

1)

40)
IF Input 0.04 GHz to 6 GHz
(SMR20)

Recommended extras

Service Kit SMR-Z1 1103.9506.02
19“Rack Adapter ZZA-211 1096.3260.00
Adapter (SMR20)

3.5 mm, female

3.5 mm, male
N, female
N, male

Adapter (SMR27/30/40)

2.9 mm, female

2.9 mm, male
N, female
N, male

1)

Factory-fitted option.

1)

1)

1)

1)

1)

1)

SMR20
SMR27
SMR30
SMR40

SMR20
SMR27/30/40

SMR-B11 1104.4250.02

SMR-B15 1104.4989.02

SMR-B17 1104.5233.02

SMR-B19 1104.6281.02

SMR-B20 1104.6381.02

1)

SMR-B23 1104.5804.02
SMR-B24 1104.6100.02

SMR-B25 1135.1998.02

1104.0002.20

1104.0002.27

1104.0002.30

1104.0002.40

1021.0512.00

1021.0529.00

1021.0535.00

1021.0541.00

1036.4790.00

1036.4802.00

1036.4777.00

1036.4783.00

Printed in Germany 0801 (Bi ko)

Certified Environmental System

ISO 14001

REG. NO 1954

Certified Quality System

ISO 9001

DQS REG. NO 1954

ROHDE& SCHWARZ GmbH & Co. KG ⋅ Mühldorfstraße 15 ⋅ 81671 München ⋅ Germany ⋅ P.O.B. 8014 69 ⋅ 81614 München ⋅ Germany ⋅ Telephone [phone]

www.rohde-schwarz.com ⋅ Customer Support: Tel. [phone], Fax [phone], E-mail: [e-mail]

PD 0757.4418.23 ⋅ Microwave Signal Generator SMR ⋅ Trade names are trademarks of the owners ⋅ Subject to change ⋅ Data without tolerances: typical values