Chapter 4
Front-Panel Key and SCPI Command Reference
Measurement keys
235
Front-Panel Key and SCPI Command
Reference
4.4.7 Modulation Rate Measurement
NOTE Firstly the PSA will down-convert the RF signal to base-band and then make the specified AM,
FM or PM demodulation. Modulation rate (modulation signal frequency) is calculated by a time
domain counter.
There is only one view available for Frequency Counter measurement. There are two windows:
ā¢ Modulation Rate Numeric Results Window (upper)
ā¢ Modulation Rate Settings Window (lower)
Default: ON
State Saved: Saved in instrument state.
Range ON|OFF
Example: :PMD:MODD OFF
:PMD:MODD?
Table 4-23 Modulation Rate Numeric Results Window
Name Corresponding Results
Modulation Rate n=1, 1st
Table 4-24 Modulation Rate Settings Window
Name Corresponding Results
IF BW Type It can be Auto, Manual or Min
IF BW This value is the IF bandwidth set manually
Detector Selection It can be Peak +, Peak ā, Peak +/ā 2 or RMS
Peak Hold It can be On or Off
HP Filter It can be None, 50 Hz or 300 Hz
LP Filter It can be None, 3 kHz, 15 kHz, 30 kHz or 300 kHz
De-emphasis Filter It can be None, 25 us, 50 us, 75 us, or 750 us
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