L3 FA2100 CVR Component Maintenance Manual With Illustrated Parts List page 170

08:07:15 Frequency Resp 1000 Hz 0.5 ref Results = HQ1 5.2 /HQ2 5.3 /HQ3
5.1 /HQC 5.1 /SQV1 5.4 /SQV2 5.4 /SQV3 5.4 /SQC 5.4 dBV
08:08:02 Frequency Resp 3500 Hz 0.5 ref Results = HQ1 3.3 /HQ2 2.9 /HQ3
2.5 /HQC 5.1 /SQV1 3.7 /SQV2 3.7 /SQV3 3.8 /SQC 3.5 dBV
08:08:12 Frequency Resp 5000 Hz 0.5 ref Results = HQC 4.9 dBV
08:08:23 Frequency Resp 6000 Hz 0.5 ref Results = HQC 4.9 dBV
08:08:23 PASSED Frequency Resp (All within 6 dB)
(9) Signal to Noise and Distortion
Record simulated data at each of the following frequencies once at 0 reference level
and again at 1/10 reference).
Frequencies for HQ1, HQ2, HQ3, HQCAM, SQV1, and SQCAM are:
206, 282, 386, 529, 724, 993, 1360, 1864, 2554 and 3500 Hz.
Frequencies for HQCAM and SQCAM are:
217, 314, 454, 656, 949, 1372, 1984 and 2869 Hz.
Frequencies for HQCAM only are:
4148 and 6000 Hz.
Verify HQ > 24.0 dB and SQ > 20.0 dB.
Example report message(s):
08:09:38 PASSED SN+D 150 Hz 1.0 ref (Expected HQ > 24.0 dB SQ > 20.0
dB) Results = HQ1 35.0 /HQ2 34.6 /HQ3 35.3 /HQC 36.9 /SQV1 32.1 /SQV2
31.6 /SQV3 32.0 /SQC 31.6 dB
08:35:07 PASSED SN+D 150 Hz 1.0 ref (Expected HQC > 24.0 dB SQC > 20.0
dB) Results = HQC 30.7 /SQC 25.9 dB
(10) Crosstalk Audio
Record simulated 1000 Hz data for each channel 1,2,3 and 4 and calculate differ-
ence between driven and non−driven channels. Verify difference is less than −40
dB.
Example report message(s):
08:41:34 PASSED Crosstalk (Audio) 1000 Hz 1.0 ref (Expected Driven − Non−
Driven < −40 dB) Results = HQ1 11.2 /HQ2 −101.0 /HQ3 −109.9 /HQC −128.1
/SQV 11.4 /SQC −84.4 dBV
08:41:49 PASSED Crosstalk (Audio) 1000 Hz 1.0 ref (Expected Driven − Non−
Driven < −40 dB) Results = HQ1 −101.3 /HQ2 11.2 /HQ3 −115.3 /HQC −107.5
/SQV 11.4 /SQC −72.3 dBV
Use or disclosure of information on this sheet is subject
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 121
Apr. 14/16