Recorder-In To Line-Out Measurement - Bosch CCS800 Service Manual

CCS800 | Service manual | Chapter 7 | Diagnostics and faultfinding
7.3.10

Recorder-in to Line-out measurement

Remove the interconnections of REC-IN-L and REC-IN-R and connect successively a sine-wave generator to the REC-IN-
L and REC-IN-R connector. Measure the output signal at the LINE-OUT connector.
NOTE: be sure that the gain control potentiometer (R200) of the recorder input is set to the middle position.
Input setting G1: M121 & M122 related to M124 (GND), see table below.
Settings for G1
Amplitude
Nominal level -20dBV (100mV
Maximum level +5dBV (1.78V
Bandwidth -20dBV (100mV
Bandwidth -20dBV (100mV
Reference: M119, R300
Bosch Security Systems | 2005-01| 3922 880 21112
Frequency
) 1kHz
rms
) 1 kHz
rms
) 125 Hz
rms
) 12.5 kHz
rms
See Ch. 13.6
Measurement results for A1
Amplification
-16.5dBV ± 2dB (85dB SPL)
+9.5dBV ± 2dB (110dB SPL)
-0.5dB ± 1dB related to nom. level at 1kHz
-1dB ± 1dB related to nom. level at 1kHz.
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