CCS800 |
Service manual | Chapter 7 | Diagnostics and faultfinding
en | 33
Bosch Security Systems | 2005-01| 3922 880 21112
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)
Measurement results for A1
Amplification at M3
position 10
-9.4dBV ±1dB
position 9
-11.4dBV ±1dB
position 8
-13.4dBV ±1dB
position 7
-15.4dBV ±1dB
position 6
-17.4dBV ±1dB
position 5
-19.4dBV ±1dB
position 4
-21.4dBV ±1dB
position 3
-23.4dBV ±1dB
position 2
-25.4dBV ±1dB
position 1
-27.4dBV ±1dB
position 0
< -70dBV (selective) or < -70 dBV (a-weighted)
•
put the volume control switch (S3) to position 10 (maximum right position) again.
Reference:
S3
See Ch. 13.5
X2, 3
See Ch. 13.7
