Signal Generation 208
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Signal Generator SMY
SMY01: 9 kHz to 1040 MHz
SMY02: 9 kHz to 2080 MHz
Low-cost, ideal for receiver testing and component measurements
Brief description
Signal Generator SMY from
Rohde&Schwarz is a cost-effective
instrument for testing AM, FM and ϕM
receivers and for component measurements. Designed exclusively for the
main applications of signal generators
by cutting out the unnecessaries, the
SMY features an outstanding price/
performance ratio. Thanks to its comprehensive basic features and excellent
signal characteristics, it is an economical solution for universal use in lab, production and service environments.
Main features
• Level range −140 dBm to +19 dBm
(25 dBm overrange with option
SMY-B40), sufficient even for receivers of highest sensitivity
• High level accuracy and low RF
leakage allowing accurate and
undegraded sensitivity measurements
• FM-DC with high accuracy of carrier frequency for testing pagers
and receivers fitted with digital
squelches
• Low SSB phase noise and high
spurious rejection for all in-channel
and blocking measurements
• Low residual FM affording ample of
margin for S/N measurements
Chapter Overview
Photo 43026-3
• Modulation generator 1 Hz to
500 kHz for modulation frequency
response measurements
• Stereo channel separation of 50 dB
and low harmonic distortion for
testing FM stereo receivers
• Non-interrupting level setting over a
range of 20 dB for reproducible
measurement of squelch hysteresis
• Frequency resolution 1 Hz, suitable
also for narrowband DUTs
• FM-DC, deviation up to 20 MHz for
VCO simulation
• FM bandwidth 2 MHz for fast FSK
and telemetry applications
• AF synthesizer 1 Hz to 500 kHz,
separate use as AF signal source for
external applications possible, eg
recording of AF frequency response
• Remote-control interface IEC625/
IEEE488 for use in automatic test
systems
• RF sweep
• Sequence function and SEQ input
for semi-automatic use
Type Index
Characteristics
Cost-saving synthesis concept
Single-loop synthesis is a concept that
makes for simple and cost-effective circuit design without losing out on high
frequency resolution and short setting
time. The fractional N-technique uses
a fractional frequency division ratio,
ie a frequency resolution of 1 Hz is
obtained in spite of the high reference
frequency. High reliability and light
weight thanks to VLSI components are
further advantages of this technique.
Uncomplicated operation
The panel controls are ergonomically
arranged. The patented, magnetically
locking spinwheel is easy to turn, nevertheless the user can exactly feel each
setting step. Fast tuning and programming of the step width are also possible. Frequently used settings can be
stored and recalled any time. The
memory saves up to 100 complete
instrument setups.
Reliability of operation, ease of
maintenance
The built-in selftest facility monitors
continuously the signal generator status. If there are any malfunctions, these
are immediately detected and indicated. The user thus has an effective
protection against invalid measurements, should the generator ever fail.
The SMY requires particularly little
maintenance: aging and drift are compensated for by control loops. Due to
the few reference components, which
are designed for maximum stability,
calibration is required at intervals of
3years only.
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Signal Generation 209
12
Contents Overview R&S Addresses
Chapter Overview
Specifications in brief
Frequency
Range SMY01/SMY02 9 kHz to 1.04 GHz/9 kHz to 2.08 GHz
Underranging down to 5 kHz (without guarantee of specs)
Resolution 1 Hz
Setting time (to within <1 x 10
<70 Hz for f <65 MHz) <60 ms
Reference frequency standard option SMY-B1
Aging (after 30 days of operation) 1 x 10
Temperature effect (0 to 55°C) 2 x 10
Warmup time − 10 min
Output for internal reference
Frequency 10 MHz
(EMF, sinewave) 1 V at 50 Ω
Level V
rms
Input for external reference 5 or 10 MHz ±5 x 10
Input level (V rms) 0.2 to 2 V at 200 Ω
Spectral purity
Spurious signals
Harmonics <−30 dBc for levels <10 dBm
Subharmonics none (f >1.04 GHz: <−40 dBc)
Nonharmonics at
>5 kHz from carrier <−70 dBc (f >1.04 GHz: <−64 dBc)
Broadband noise with CW,
f=>65 MHz <−140 dBc
SSB phase noise at 20 kHz from carrier, 1 Hz bandwidth,
CW f <65 MHz <−114 dBc
Residual FM, rms, <1% of max. deviation, f=1 GHz,
0.3 to 3 kHz (CCITT) <10 Hz (0.03 to 20 kHz: <20 Hz)
Residual AM, rms (0.03 to 20 kHz) <0.02%
Level
Range −140 to +13 dBm; −134 to +19 dBm
Overranging (without guarantee of specs) up to +19 dBm; −140 to +25 dBm
Resolution 0.1 dB
Accuracy for levels >−127dBm ±1 dB (f >1.04 GHz: ±1.5 dB)
Frequency response at 0 dBm 1 dB, typ. 0.3 dB
Characteristic impedance 50 Ω
VSWR <1.5 (f >1.04 GHz: <1.8)
Setting time (IEC/IEEE bus) <25 ms (<10 ms with electronic level setting)
Non-interrupting level setting 0 to −20 dB
Overload protection protects the instrument against exter-
Max. permissible RF power 30 W (SMY 02: 50 W)
Max. permissible DC voltage 35 V
Max. pulse load (pulse width <10 µs) 1 mWs or 150 V (peak)
Simultaneous modulation any combination of AM, FM (ϕM) and
Amplitude modulation internal, external AC/DC
Modulation depth 0 to 100%
Resolution 0.1%
Setting error at 1 kHz (m <80%) <4% of reading ±1%
AM distortion at 1 kHz
m=30% <1%; 3%
m=80% <2%; 5%
Modulation frequency response (m=60%)
30 Hz (DC) to 10 kHz 0.4 dB
10 Hz (DC) to 50 kHz 3 dB
Incidental ϕM at AM (30%), AF=1 kHz <0.2 rad
Frequency modulation internal, external AC/DC
Max. deviation for carrier frequency
<65 MHz 10 MHz
65 to 130 MHz 1.25 MHz
130 to 260 MHz 2.5 MHz
260 to 520 MHz 5 MHz
520 to 1040 MHz 10 MHz
1040 to 2080 MHz 20 MHz
Resolution <1%, min. 10 Hz
100 MHz/500 MHz <−132 dBc/<−120 dBc
1 GHz/2GHz <−114 dBc/<−108 dBc
−7
for f >65 MHz or
−6
/year <1 x 10−9/day
<−25 dBc for levels <16 dBm
carrier offset >1 MHz, 1 Hz bandwidth,
nally applied RF power and DC vol tage
(50 Ω source)
pulse modulation
1)
1)
<0.4 rad at f >1.04 GHz (SMY02)
−6
−6
<5 x 10
1 )
−8
1)
Type Index
Setting error at AF= 1 kHz <3% of reading + 20 Hz
FM distortion at AF=1 kHz
and 3% of max. deviation <0.3%, typ. 0.1%
Modulation frequency response
10 Hz (DC) to 2 MHz 3 dB, typ. 1 dB
Incidental AM at AF=1 kHz,
f >1 MHz, 40 kHz deviation <0.1%
Stereo modulation at
40 kHz deviation, AF=1 kHz
Crosstalk attenuation >50 dB
S/N ratio
unweighted >76 dB
weighted >70 dB
Distortion typ. 0.1%
Carrier frequency offset
with FM-DC <1 Hz + 0.1% of deviation
Phase modulation internal, external AC
Max. deviation for carrier frequency
<65 MHz 200 rad
65 to 130 MHz 25 rad
130 to 260 MHz 50 rad
260 to 520 MHz 100 rad
520 to 1040 MHz 200 rad
1040 to 2080 MHz 400 rad
Resolution <1%, min. 0.01 rad
Setting error at AF= 1 kHz <5% of reading + 0.02 rad
Distortion at AF=1 kHz and
50% of max. deviation <0.5% (typ. 0.2%)
Modulation frequency response
20 Hz to 20 kHz <3 dB (typ. 1 dB)
Pulse modulation external
On/off ratio >80 dB; >70 dB at 70 MHz
Rise/fall time (10/90%) typ. 4 µs; <20 ns
Pulse delay typ. 2.5 µs; <200 ns
Modulation input TTL/HC logic signal, polarity selectable
Input impedance 10 kΩ
1)
Internal modulation generator
Frequency range/resolution 1 Hz to 500 kHz/0.1 Hz
Display 7 digits, floating point
Frequency drift <5 x 10
Frequency response up to 50 kHz 0.2 dB (up to 100 kHz: <0.3 dB)
Distortion (20 Hz to 100 kHz) <0.1%
Output voltage (peak) 1 V ±1% (R
RF Sweep digital sweep in discrete steps
Mode automatic, linear
Sweep range and step width user-selected
Step duration 10 ms to 5 s
Resolution 1 ms
1)
−5
<10 Ω, RL >200 Ω)
out
General data
Remote control IEC 625 (IEEE 488)
Memory non-volatile, for 100 instrument setups
Power supply 100 V/230 V (AC) −10 to +15%,
Dimensions (W x H x D)
SMY01 435 mm x 147 mm x 350 mm
SMY02 435 mm x 147 mm x 460 mm
Weight for fully equipped unit 12 kg (SMY01), 13 kg (SMY02)
120 V/220 V (AC) −12.5 to +10%,
47 to 440 Hz, max. 120 VA
Ordering information
Signal Generator SMY 01 1062.5502.11
Options, extras
Reference Oscillator OCXO SMY-B1 1062.7505.02
Rear Connectors for RF and LF SMY-B10 1062.8001.02
High Output Power SMY-B40
Service Kit SMY-Z2 1062.7805.02
Service Manual 1062.5583.24
SMY 02 1062.5502.12
2 )
1062.9008.02
1)
1)
1)
with option SMY-B40
2)
To be retrofitted by authorized service centers only.
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