S E T U P F O R M
C H A P T E R 4
These settings adjust the gain for signals coming in and out of the VAC interface.
Use the
RX
control to adjust the audio level going to third party programs. Note that this
control supersedes the front panel AF control for third party applications.
Use the
TX
control to adjust the volume of audio coming from third party applications. Use this
control instead of the MIC control on the front panel to calibrate transmit (adjust for 0 dB on the
ALC meter).
Latency
Using the manual option, the user may add additional latency (in milliseconds) to the audio buffering
system for better audio performance. When the manual setting is off, the delay is set to 0ms. Note that
some systems will have trouble with the manual setting on and values below approx. 15ms. We
recommend using the default automatic latency setting for best results.
Mono/Stereo
Check this check box for stereo audio channels. Most third party applications require monaural audio.
In this case leave the box unchecked. However, several DRM applications such as DREAM and HamPal
require stereo audio.
Combine VAC Input Channels
Becomes enabled when
Mono/Stereo
is checked. Check to combine both L and R stereo input
channels.
Auto Enable
Figure 73: Auto Enable
Use this control to automatically enable VAC when operating digital modes (DIGL, DIGU, DRM). This
allows the user to easily switch between digital modes and SSB/AM/FM without having to separately
enable/disable VAC.
Allow PTT to override/bypass VAC for Phone
Check this box if you wish to override or bypass VAC when activating PTT, e.g. to use your microphone.
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2003-2009 FlexRadio Systems
