Atec RohdeSchwarz-SMW200A - Manual (Page 14)

Version 01.02, September 2013
14 Rohde & Schwarz R&S ® SMW200A Vector Signal Generator
Analog modulation
Amplitude modulation
Modulation source internal, external
External coupling AC, DC
Modulation depth modulation is clipped at high levels when
maximum PEP is reached 0 % to 100 %
Resolution of setting 0.1 %
AM depth (m) error f
mod
= 1 kHz and m < 80 % < (1 % of reading + 1 %)
AM distortion f ≤ 3 GHz, f
mod
= 1 kHz
m = 30 % < 0.8 %
m = 80 % < 1.4 %
f > 3 GHz, f
mod
= 1 kHz
m = 30 % < 1 %
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
Frequency modulation (R&S ® SMW-B20 or R&S ® SMW-B22 option)
R&S ® SMW-B13T must be installed.
FM multiplier (rm) for different frequency
ranges 100 kHz ≤ f ≤ 200 MHz rm = 1
200 MHz < f ≤ 375 MHz rm = 0.25
375 MHz < f ≤ 750 MHz rm = 0.5
750 MHz < f ≤ 1500 MHz rm = 1
1500 MHz < f ≤ 3000 MHz rm = 2
3000 MHz < f ≤ 6000 MHz rm = 4
Modulation source internal, external, internal + external
External coupling AC, DC
Operating modes with R&S ® SMW-B20 option FM mode: normal
with R&S ® SMW-B22 option FM mode: normal,
FM mode: low noise
Maximum deviation FM mode: normal rm × 10 MHz
FM mode: low noise rm × 100 kHz
Resolution of setting < 200 ppm, min. rm × 0.1 Hz
FM deviation error f
mod
= 10 kHz, deviation ≤ half of maximum deviation
internal < (1.5 % of reading + 20 Hz)
external < (2.0 % of reading + 20 Hz)
FM distortion f
mod
= 10 kHz, deviation = rm × 1 MHz < 0.1 %
Modulation frequency response FM mode: normal (DC/AC coupling), 50 Ω input impedance
DC/10 Hz to 100 kHz < 0.5 dB
DC/10 Hz to 10 MHz < 3 dB
FM mode: low noise (DC/AC coupling), 50 Ω input impedance
DC/10 Hz to 100 kHz < 3 dB
Synchronous AM with FM 40 kHz deviation, f
mod
= 1 kHz
5 MHz < f ≤ 3 GHz < 0.1 %
f > 3 GHz < 0.2 %
Carrier frequency offset at FM < 0.2 % of set deviation