Nautel VX150, Operation & Maintenance Manual

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VX150 TO VX2 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER
VERSION 1.0 2022-12-08 PAGE 2.2.107
• Input Levels: Use the Front Panel rotary knob to edit the desired audio level, noting the mini-
mum and maximum limitations indicated at the bottom of the display. Press the Front Panel
rotary knob to save the change. Press the Back button to discard the change and return to the
previous menu.
• Enable Audio Low: Use the Front Panel rotary knob to move the slider to the right (enabled).
This will open two additional options. Set the Audio Low Timeout to the desired value (allow-
able range is 1 to 600 seconds). Set the Audio Low Threshold to the desired value, below which
the transmitter will take action. The allowable range is determined by the audio source. If the
applicable audio source level falls below the trip level setting for longer than the timeout set-
ting, an alarm will activate in the Alarms page. When the audio source level increases above
the trip level, the alarm will clear. If a backup audio source has been configured the audio low
alarm will cause a switch to the backup audio source. If the alarm is cleared (main audio has
returned for at least 1 second) then the transmitter with automatically switch back to main
audio. Use the Front Panel rotary knob to edit the desired parameter and press the Front Panel
rotary knob to save the change. Press the Back button to discard the change and return to the
previous menu.
• Low Pass Filter: Use the Front Panel rotary knob to move the slider to the right (enabled). Press
the Back button to discard the change and return to the previous menu.
• Pre-emphasis: Use the Front Panel rotary knob to edit the desired Pre-emphasis characteristic -
0 us, 50 us or 75 us and press the Front Panel rotary knob to save the change. Press the Back
button to discard the change and return to the previous menu.