Pre-Installation Transponder Check; Table 4-1 Pre-Installation Check - Garmin GDL 82 Installation Manual

4.2 Pre-Installation Transponder Check

Use a ramp tester to verify the existing transponder system's peak output power and receiver sensitivity is compatible
with the GDL 82 before installation. The GDL 82 introduces up to 1.5 dB loss in the transmission line as measured at
the antenna output.
STEP
Determine the RF Peak Output Power and
Receiver Sensitivity IAW Part 43, Appendix
1. F for the existing transponder system.
Record the observed values of RF Peak
Output Power and Receiver Sensitivity.
Subtract the anticipated maximum loss
(1.5 dB) from the peak output power and
2.
add 1.5 dB to the sensitivity values
determined in Step 1.
Verify that the peak output power and
3.
sensitivity meet the required minimums.
190-01810-00
Rev. 5

Table 4-1 Pre-Installation Check

DESCRIPTION
Installation Planning and Considerations
NOTES
RF Peak Output Power: ___________
Class A: > 21.0 dBw (125 watts)
Class B: > 18.5 dBw (70 watts)
Receiver Sensitivity (MTL): __________
Any Class: MTL = -73 ±4 dBm
<Output Power> dBw - 1.5dB =_____dBw
<Sensitivity> dBm + 1.5dB =______dBm
Peak Output Power:
Class A: > 21.0 dBw (125 watts)
Class B: > 18.5 dBw (70 watts)
Receiver Sensitivity (MTL):
Any Class: MTL = -73 +4 dBm
GDL 82 TSO Installation Manual
Page 4-2