System Volume Control Test - Bosch CCS800 Service Manual

CCS800 | Service manual | Chapter 7 | Diagnostics and faultfinding
7.3.14

System volume control test

Measure the output level related to each position of the volume control (S3) for the loudspeakers of the Delegate and
Chairman units.
Input setting G1: M1 related to M2 (GND) is -36dBV (15.8mVrms) with a frequency of 1 kHz.
Position of the loudspeaker
volume control switch (S3)
position 10
position 9
position 8
position 7
position 6
position 5
position 4
position 3
position 2
position 1
position 0
• put the volume control switch (S3) to position 10 (maximum right position) again.
Reference: S3
X2, 3
Bosch Security Systems | 2005-01| 3922 880 21112
Measurement results for A1
Amplification at M3
-9.4dBV ±1dB
-11.4dBV ±1dB
-13.4dBV ±1dB
-15.4dBV ±1dB
-17.4dBV ±1dB
-19.4dBV ±1dB
-21.4dBV ±1dB
-23.4dBV ±1dB
-25.4dBV ±1dB
-27.4dBV ±1dB
< -70dBV (selective) or < -70 dBV (a-weighted)
See Ch. 13.5
See Ch. 13.7
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