Audio Control In To Line-Out Via Afs Circuit Of Cpsu Measurement - Bosch CCS800 Service Manual

CCS800 | Service manual | Chapter 7 | Diagnostics and faultfinding
7.3.15

AUDIO CONTROL IN to LINE-OUT via AFS circuit of CPSU measurement

(LBB 3310/10 only)
Connect a sine-wave generator to one Trunk connectors (X2) M1 and measure the output signal at output LINE-OUT
(M119).
• Set AFS switch (S4) to position 'On'.
• Connect on CPSU board X10-3 (audio out) to X10-5 (audio in). AFS board is not required for this test.
Input setting G1: X11 p-1 related to M2 (GND), see table below.
settings for G1
Amplitude
Nominal level -28dBV (39.8mV
Maximum level -3dBV (794mV
Bandwidth -28dBV (39.8mV
Bandwidth -28dBV (39.8mV
• Set AFS switch (S4) to position 'Off'.
Reference: X10, 12
X2
Bosch Security Systems | 2005-01| 3922 880 21112
Frequency
) 1 kHz
rms
) 1 kHz
rms
) 125 Hz
rms
) 12.5 kHz
rms
See Ch. 13.6
See Ch. 13.7
measurement results for A1
Amplification
-14dBV ± 2dB (85dB SPL)
+11dBV ± 2dB (110dB SPL)
-0.5dB ± 1dB related to nom. level at 1kHz
-1dB ± 1dB related to nom. level at 1kHz.
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