Atec Rohde-Schwarz-SMJ100A - Manual (Page 11)

Version 05.00, December 2007 R&S ® SMJ100A Vector Signal Generator 11
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 (V
p
) 1 V <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 full frequency range
linear step width full 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 ® SMJ-B20 option
input sensitivity (peak value for set
modulation depth or deviation) 1 V
Modulation input
EXT MOD
absolute maximum rating 10 V
Amplitude modulation
Operating modes internal, external AC/DC
Modulation depth At high levels, modulation is clipped if the
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
Incidental φM at AM m = 30 %, f
mod
= 1 kHz, peak value <0.1 rad