Atec RohdeSchwarz-SMW200A - Manual (Page 26)

Version 01.02, September 2013
26 Rohde & Schwarz R&S ® SMW200A Vector Signal Generator
Seamless changeover output up to end of current segment,
followed by changeover to next segment
Sequencer play list length max. 1024
Sequencer segment repetitions max. 8388607
Multicarrier waveform mode
Number of carriers
max. 512
Total RF bandwidth max. 120 MHz
with R&S ® SMW-K522 option max. 160 MHz
Carrier spacing
Setting range depends on number of carriers and signal
RF bandwidth
Setting resolution 0.01 Hz
Crest factor modes maximize, minimize, off
Signal period modes longest file, shortest file, user (max. 1 s)
Single carrier gain
Setting range –80 dB to 0 dB
Setting resolution 0.01 dB
Single carrier start phase
Setting range 0° to 360°
Setting resolution 0.01°
Single carrier delay
Setting range 0 s to 1 s
Setting resolution 1 ns
I/Q baseband generator (R&S ® SMW-B10 option) – realtime operation (custom
digital modulation)
One or two R&S ® SMW-B10 can be installed. Their I/Q signals can be assigned a frequency offset and/or be added in the digital
domain with settable level ratio.
Types of modulation
ASK
Modulation index 0 % to 100 %
Resolution 0.1 %
FSK 2FSK, 4FSK, MSK
Deviation 0.1 to 1.5 × f
sym
Maximum 10 MHz
Resolution 0.1 Hz
Variable FSK 4FSK, 8FSK, 16FSK
Deviations –1.5 × f
sym
to +1.5 × f
sym
Maximum 10 MHz
Resolution 0.1 Hz
PSK BPSK, QPSK, QPSK 45° offset, OQPSK,
π/4-QPSK, π/2-DBPSK, π/4-DQPSK,
π/8-D8PSK, 8PSK, 8PSK EDGE
QAM 16QAM, 32QAM, 64QAM, 256QAM,
1024QAM,
π/4-16QAM, –π/4-32QAM (for EDGE+)
Symbol rate If an external clock is used, the applied data rate may deviate from the set clock rate by
±2 %.
Operating mode internal, external
Setting range ASK, PSK and QAM 400 Hz to 50 MHz
FSK 400 Hz to 40 MHz
Resolution 0.001 Hz
Frequency uncertainty (internal) < (5 × 10 − 14 + relative deviation of
reference frequency) × symbol rate (nom.)
External clock symbol
External clock rate max. 200 MHz
External clock input selectable from USER 1, 2, 3 on front
panel or T/M/C 1 of respective baseband
generator on rear panel
Connector type USER 1, 2, 3 on front panel
T/M/C 1 of respective baseband generator
on rear panel BNC female
Input level 0 V to 3 V (nom.)
Threshold settable between 10 mV and 1.9 V
Input impedance selectable 1 kΩ or 50 Ω (nom.)