3
rd
Generation Rack-
Mount RDMS™
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Quasonix, Inc.
4.4.2.23.4 Channel B Scale
The Channel B Scale option, shown in Figure 125, adjusts the peak-to-peak amplitude on the Q/Video B output. By
default the video output is 1.0000 V peak-to-peak using a standard deviated NTSC video signal. This setting allows
the user to compensate for a system where this is not the case.
To change the Channel B Scale setting, select the Channel B Scale option, then press the Enter key on the front
panel. A dialog screen displays prompting the operator to enter a new Channel B scale setting using the rack’s front
panel numeric keypad. When the new value is entered, press the Enter key on the keypad.
Figure 125: Video Output Menu, Channel B Scale Selection
4.4.2.23.5 Tape Out Frequency
The Tape Out Frequency option, shown in Figure 126, sets the carrier frequency for any video output that is set to
Tape Output or Carrier Only. The frequency may be selected from a standard set of values. Alternatively, any
frequency up to 46.666 MHz may be entered as a custom frequency. Note, however, that frequencies above 30 MHz
will experience filter roll-off and may not be useful.
Figure 126: Video Output Menu, Tape Out Frequency Selection
4.4.2.23.6 FM De-emphasis (PCM/FM Mode Only)
The FM De-emphasis option, shown in Figure 127, is used to set the FM De-emphasis value to NTSC, PAL, or Off.
This option should be used when a corresponding video pre-emphasis filter is used on the video transmit side.
