b. Receive Audio
● The receive audio menu is used to set the internal amplifier gain. There are two
settings:
1. Preamp (Coarse) -
Click on the rotary encoder switch to toggle between the four
small boxes in the bottom right.
2. PGA Gain (Fine) -
Rotate the rotary encoder to adjust the slider setting.
● Use the on-screen scope view (left side) to watch incoming audio. If you are
running an open-squelch setup, you will have a constant wave fluctuation shown
by the noise coming from the radio. If you are running closed squelch, you
should have a flat line in the middle. Only when you receive a packet should
you see anything on the scope display. Adjust the coarse and fine settings to
achieve a peak of 70-80%
when receiving a live packet
. Do not set the white
noise level for this value or you will overload the modem when a real packet is
received.
