Garmin Apollo CNX80 Installation Manual page 90

Post-Installation Configuration & Checkout
Figure 3-20 - Interface Monitor Function Display - Page 3
This page displays the current values of the synchro heading, baro potentiometer and 26VAC reference
inputs.
Press the MAIN line select key to return to the Interface Monitor Function Display - Page 1.
Details for each of the inputs that can be monitored are shown in Table 3-4.
For each CNX80 ARINC 429 input that is used, verify that data is being received. If no data is being
received, ensure that (i) the source equipment is turned on, (ii) the ARINC 429 input type and speed has
been set up correctly, and (iii) the wiring is correct.
For each discrete input that is connected to the CNX80, exercise the discrete and verify that the appropriate
discrete changes from a '0' to a '1' when activated (the CDI Select input will momentarily change to a 'T'
when exercised).
For each CNX80 serial input that is used, verify that data is being received. If no data is being received,
ensure that (i) the source equipment is turned on, (ii) the serial port input RX type has been set up
correctly, and (iii) the wiring is correct.
If synchro heading is supplied to the CNX80, verify that the synchro heading is displayed and agrees with
the value provided by the heading source. If the synchro heading is dashed out, ensure that (i) the source
equipment is turned on, (ii) the heading valid discrete is VALID (P5-57 = '1'), (iii) the 26VAC 400 Hz
reference is being supplied, and (iv) the wiring is correct.
If a baro pot is connected to the CNX80, verify that the baro-correction is displayed and agrees with the
altimeter baro-correction. If the baro-correction value does not vary with the altimeter value, ensure that (i)
the baro-correction has been properly calibrated, and (ii) the wiring is correct.
3-18 560-0982-00 Rev D Apollo CNX80 Installation Manual