Atec Rohde-Schwarz-SMU200A - Manual (Page 16)

Version 08.00, January 2012
16 Rohde & Schwarz R&S ® SMU200A Vector Signal Generator
Analog modulation
Internal modulation generator
Frequency range 0.1 Hz to 1 MHz
Resolution of setting 0.1 Hz
Frequency uncertainty < 0.012 Hz +
relative deviation of reference frequency
up to 100 kHz < 0.1 dB Frequency response
up to 1 MHz < 1 dB
Distortion up to 100 kHz at R
L
> 200 Ω,
level = 1 V (V
p
)
< 0.1 %
V
p
at LF connector, R
L
> 200 Ω 1 mV to 3 V
resolution 1 mV
Output voltage
setting uncertainty at 1 kHz < (1 % of reading + 1 mV)
Output impedance 16 Ω
Frequency setting time to within < 1 × 10
−7
, with GUI update
stopped, after IEC/IEEE bus delimiter
< 3 ms
digital sweep in discrete steps
operating modes
automatic, step, single,
external single, external step,
manual or external trigger,
linear or logarithmic spacing
sweep range entire frequency range
linear step width entire frequency range
Sweep
logarithmic step width 0.01 % to 100 % per step
Input for external modulation signals
input impedance
high (> 100 k Ω),
switchable to 50 Ω with R&S ® SMU-B20 or
R&S ® SMU-B22 option
input sensitivity (peak value for set
modulation depth or deviation) 1 V
Modulation input
EXT MOD
maximum permissible input voltage ±10 V
Amplitude modulation
Operating modes internal, external AC/DC
Modulation depth modulation is clipped at high levels if
maximum PEP is reached 0 % to 100 %
Resolution 0.1 %
Setting uncertainty attenuator mode: auto,
f
mod
= 1 kHz and m < 80 %
< (1 % of reading + 1 %)
PEP in specified range,
attenuator mode: auto
f
≤ 3 GHz, at f
mod
= 1 kHz, m = 30 % < 0.5 %
m = 80 % < 0.8 %
f > 3 GHz, at f
mod
= 1 kHz, m = 30 % < 1 %
AM distortion
m = 80 % < 1.6 %
Modulation frequency range DC, 20 Hz to 500 kHz
Modulation frequency response AC mode, 20 Hz to 500 kHz < 1 dB
Synchronous φM at AM m = 30 %, f
mod
= 1 kHz, peak value < 0.1 rad
Wideband amplitude modulation
Operating modes modulation input I external DC
Modulation frequency response as with I/Q modulation – external wideband I/Q
Input impedance 50 Ω
Input sensitivity peak voltage for 100 % AM 0.25 V