Use this screen to set the audio levels in the controller. It is used to set the values in the gain set digital potentiometers in both the CPU and Radio Control boards.
The parameters are listed in a matrix of small text entry fields. This set of fields is used to display the pot values as stored in the controller or in the configuration program. If the configuration program is connected to the controller through the serial port, then the pot values in the controller can be read, and interactively changed. Values can be changed either by directly typing new values into the entry field, or they may be changed by clicking on the incrmental pad to the right-center of the screen. When using the interactive incrmenting screen, the pot to be changed is selected by the selection buttons along the top and left sides of the incrementing pad
Test tones generated in the CPU card tone generator can be enabled in this part of the screen. The tone will be directed to the port selected in the Port section of the screen. The frequency can be entered directly into the frequency entry field, or enable one of the pre-defined frequencies by clicking on the labeled frequency buttons. The frequencies of these buttons may be re-defined by editing the config.env file. Use a frequency of near 1kHz for setting the levels (900 or 1000 Hz). With the test tone generator level at 127 and the telemetry pot settings at 118, these frequencies should result in a backplane audio level close to the recommended 1/2 system deviation level of 0.5 Vp-p. The test tone can then be used to set the transmit pot levels to 1/2 system deviation at the transmitter outputs. Receive level pots should be set using 1/2 system level deviation at the same frequencies, generated with a service monitor or other calibrated frequency generator.