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BARRETT PRC-4090 TACTICAL HF SDR TRANSCEIVER - ADVANCED OPERATION
Tx Timeout
When this feature is enabled, the transceiver will stop transmitting if the PTT
button is held on for more than the allowed time limit eg. if the handset is
accidentally wedged under a seat. Releasing and pressing the PTT button will
re-enable transmission.
Set the maximum transmit time to either one, two, or three minutes. Alterna-
tively, this transmit timeout can be disabled.
Noise Blanker
This setting allows the predictive noise blanker to be switched on or off. The
noise blanker is useful to reduce repetitive vehicle related electrical interference
eg. noise from a windscreen wiper motor.
Note: The noise blanker will not be effective in situations where for example, exter
-
nal power line noise is blanketing the receiver.
Select either: Off or On.
Note: In certain situations noise blankers can cause intermodulation in receivers. In
these cases the noise blanker should be disabled.
Tx Power Level
This section sets the global RF power output for all channels in the transceiver.
Select either: 10 W, 30 W, 125 W, or 150 W in SDS mode.
Select either: 10 W, 30 W in Manpack mode.
AGC Hang
Automatic Gain Control (AGC) Hang delays the AGC system’s gain response
after a signal level decreases to zero. This prevents receiver noise for the hang
period.
Select either: Hang Off or Hang AGC.
Broadcast Filter
With the Broadcast Filter enabled, strong broadcast signals below 1.6 MHz will
be filtered out.
Select either: Disabled or Enabled.