L3 FA2100 CVR Component Maintenance Manual With Illustrated Parts List page 215

08:42:19 PASSED Crosstalk (Audio) 1000 Hz 1.0 ref (Expected Driven − Non−
Driven < −40 dB) Results = HQ1 −304.9 /HQ2 −304.9 /HQ3 −111.7 /HQC 11.1
/SQV −72.4 /SQC 11.4 dBV
(11) Crosstalk Data
This is a test for CVDR recorders where both flight data and voice data are being
recorded.
A Channel Balance is performed prior to the cross talk data test to determine and
store results for each channel 1,2,3 and 4.
Record 6000 Hz simulated rotor data and simulated GMT 429 and calculate chan-
nel results minus channel balance results. Verify difference is less than −34 dB
Example report message(s):
08:43:07 PASSED Channel Bal 1000 Hz 1.0 ref (All within 3 dB) Results = HQ1
11.2 /HQ2 11.2 /HQ3 11.0 /HQC 11.1 /SQV1 11.0 /SQV2 11.3 /SQV3 11.4
/SQC 11.5 dBV
08:43:23 PASSED Crosstalk (Data) 6000 Hz 1.0 ref (Expected Crosstalk −
Channel Bal < −34 dB) Results = HQ1 −304.9 /HQ2 −125.7 /HQ3 −304.8 /HQC
−49.8 /SQV −83.4 /SQC −82.8 dB
(12) FSK Time
This test cycles power to recorder to reset for FSK input then records simulated
16000 sps FSK data and then simulated GMT 429 data (label 150) first with channel
1 output and again with channel 3 output. It verifies 9 good FSK data patterns and a
switch to 9 good GMT 429 data patterns for each channel 1 and channel 3.
Example report message(s):
14:50:07 PASSED FSK Time HQ1 (Playback)(Expected 9 patterns) Results = 9
good patterns
14:50:07 PASSED FSK Time HQ1 (GMT Switch) (Expected 9 patterns) Results
= 9 good patterns
14:50:53 PASSED FSK Time HQ3 (Playback)(Expected 9 patterns) Results = 9
good patterns
14:50:53 PASSED FSK Time HQ3 (GMT Switch) (Expected 9 patterns) Results
= 9 good patterns
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to the restrictions on the cover page of this document.
The document reference is online, please check the correspondence between the online documentation and the printed version.
AVIATION RECORDERS
COMPONENT MAINTENANCE MANUAL
FA2100CVR
23–70–04
Testing & Fault Isolation
Rev. 15 Page 166
Apr. 14/16