GTR 225/GNC 255 TSO Installation Manual 190-01182-02
Page 6-10 Rev. B
6.4.3.2 COM RX Squelch
The COM RX squelch page (Figure 6-15) allows the installer to configure the squelch for the COM
receiver. The COM RX squelch adjusts the signal strength required to break squelch for the COM receiver.
The COM RX squelch is adjustable in the range of 0 (zero) to 100. The default value is zero. Decreasing
the value will allow squelch to be broken with low signal levels. Increasing the value will require higher
signal levels to break squelch.
Figure 6-15. COM RX Squelch Page
6.4.3.3 COM Info
The COM information page (Figure 6-16) allows the installer to view and verify the COM board software
version, software part number, hardware version, boot version, boot P/N, FPGA version, and FPGA P/N.
Figure 6-16. COM Information Page
6.4.3.4 COM Update
Garmin recommends the use of a USB 2.0 compatible USB flash drive for updating
databases and software on the GTR/GNC.
Figure 6-17. COM Software Update Page
Refer to Section 6.8 for instructions on loading COM software to the GTR/GNC.
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