Atec Rohde-Schwarz-SMU200A - Manual (Page 17)

Version 08.00, January 2012
Rohde & Schwarz R&S ® SMU200A Vector Signal Generator 17
Pulse modulation
Operating modes external,
internal (duty cycle approx. 1:1)
On/off ratio > 70 dB
Rise/fall time 10 %/90 % of RF amplitude 1 µs (typ.)
Pulse repetition frequency 0 Hz to 100 kHz
Video crosstalk spectral line of fundamental of 100 kHz
square-wave modulation < −30 dBc
input level rising 1.7 V, falling 1.1 V (typ.)
input impedance > 10 k Ω
Modulation input
EXT MOD A/B
polarity selectable
Frequency modulation (R&S
®
SMU-B20 or R&S
®
SMU-B22 option)
Operating modes internal, external, internal + external,
AC/DC, normal,
low noise (with R&S
® SMU-B22 only)
0.3 MHz ≤ 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
FM/ φM range multiplier
f > 3000 MHz rm = 4
FM mode: normal rm × 10 MHz Maximum deviation
FM mode: low noise rm × 100 kHz
Resolution < 200 ppm, min. rm × 0.1 Hz
f
mod
= 10 kHz, deviation ≤ half of maximum deviation
internal < (1.5 % of reading + 20 Hz)
Setting uncertainty
external < (2.0 % of reading + 20 Hz)
FM distortion f
mod
= 10 kHz and 1 MHz deviation < 0.1 %
FM mode: normal
10 Hz to 100 kHz < 0.5 dB
10 Hz to 10 MHz < 3 dB
FM mode: low noise
Modulation frequency response
10 Hz to 100 kHz < 3 dB
40 kHz deviation, f
mod
= 1 kHz, f > 5 MHz < 0.1 % Synchronous AM
f > 3 GHz < 0.2 %
Carrier frequency offset at FM < 0.2 % of set deviation
Phase modulation (R&S
®
SMU-B20 or R&S
®
SMU-B22 option)
Operating mode internal, external, internal + external,
AC/DC, high bandwidth,
high deviation,
low noise (with R&S
® SMU-B22 only)
φM mode: high deviation rm × 20.0 rad
φM mode: high bandwidth rm × 1.0 rad
Maximum deviation
φM mode: low noise rm × 0.25 rad
φM mode: high deviation < 200 ppm, min. rm × 20 µrad
φM mode: high bandwidth < 0.1 %, min. rm × 20 µrad
Resolution
φM mode: low noise < 200 ppm, min. rm × 20 µrad
f
mod
= 10 kHz, deviation ≤ half of maximum deviation
internal < (1.5 % of reading + 0.01 rad)
Setting uncertainty
external < (2.0 % of reading + 0.01 rad)
φM distortion f
mod
= 10 kHz, half of maximum deviation < 0.2 %, 0.1 % (typ.)
10 Hz to 500 kHz,
φM mode: high deviation < 1 dB
10 Hz to 10 MHz,
φM mode: high bandwidth < 3 dB
Modulation frequency response
10 Hz to 100 kHz, φM mode: low noise < 3 dB