Technical Guide: RDMS Telnet and Serial Control
51
Quasonix, Inc.
OR
D <m>
sets the NTSC Video deemphasis filter mode to one of three values
•
0 - Off
•
N - NTSC
•
P - PAL
Example:
FM
FM output po
FM demodulator bandwidth 1.4 MHz
FM output scale 1.0
Video de-emphasis filter Off
2.1.1.23.1 FM Video Bandwidth Control - FM B
The FM B x command adjusts the I/Q (video) output bandwidth with PCM/FM in mind. Setting the FM (video)
bandwidth wider than it would normally be set by the bit rate (this would be 1.1 to 1.4 wider than the bit rate)
configures the system to allow a higher bandwidth on the output while allowing normal PCM/FM demodulation on
the lower frequency PCM/FM.
•
The video bandwidth can never be set narrower than the
required bandwidth for the specified bit rate.
•
The IF filter selection, if set to FS A, is wide enough to
accommodate the wider FM (video) bandwidth.
•
This configuration only operates properly in Phase Noise
Compensation mode (PN 1).
•
Modulation Index tracking must be turned OFF as it is
incompatible with modulations like PCM/FM/FM.
•
The video bandwidth must be set AFTER the bit rate has
been set.
•
Setting the bit rate sets the video bandwidth compatible with
the bit rate.
2.1.1.24 Frequency - FR
The FR command displays and controls receiver frequency.
FR [<f>]
- Sets receiver to <f> in MHz
where: <f> - Receiver frequency
P band: 200.0 to 1150.0 MHz
CT band: 1150.0 to 2500.0 MHz
C band: 4400.0 to 5250.0 MHz
70 MHz band: 70.0 to 70.0 MHz
Playback band: 0.1 to 20.0 MHz