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Apollo CNX80 Pilot’s Guide
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ID/To/Fr
When the Active frequency is a VOR, you can view the current course 
To/Fr the VOR as well as the Identifier and distance. This value 
appears between the Active and Standby VOR frequencies and to the 
right. Press Menu/Enter and then each press of the ID/To/Fr key will 
toggle between the display of the ID (Identifier), To bearing, or From 
bearing values. 
Back Course
When the Active frequency is an ILS, the Back Course mode will be 
available for ILS frequencies. Press Menu/Enter and then the Back 
CRS key to turn Back Course mode on. Back Course mode reverses 
needle sensing. When on, the Back CRS menu label will be high-
lighted. 
Audio
This function operates the same as in Com mode. 
Save Channel
This function operates the same as in Com mode. 
Test Log
The Test Log function allows you to store information about the last 
time you tested your Nav receiver. The information you can enter 
includes: Date (month, day, year), Type of test (Differential, Ground, 
Air), Location (text), Bearing Error (-5 to +5), and name of person log-
ging the test information (text). 
1. In the Nav function, Press Menu/Enter and then the Test Log key. 
2. Press the EDIT key. The month of the Date will be highlighted. 
3. Turn the Small knob the change the month of the date. Turn the 
Large knob to move to Day of the Date. 
4. Turn the Small knob to change the day. Turn the Large knob to move 
to the year. Turn the Small knob to change the year. 
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CNX80 Pilot Guide 560-0984-00C Draft1.book  Page 22  Tuesday, September 2, 2003  10:36 AM