Bose FREESPACE BUSINESS 서비스 매뉴얼 - 페이지 14
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Bose FREESPACE BUSINESS에 대해서도 마찬가지입니다: 서비스 매뉴얼 (50 페이지)
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11. Page Mute
11.1 Apply a 3mVrms, 1 KHz signal to the
page input.
11.2 Apply a 2Vrms, 1 KHz signal to
channel A and B input.
11.3 Remove the applied signal from the
page input ( page will mute audio for 3
seconds ).
11.4 Using the chart below, measure the
output of each channel.
O u t p u t
M i n M a x U n i t
L i n e
Model 32
Model 8
12. Page Frequency Response
12.1 Apply a 1 KHz, 10mVrms signal to the
page input.
12.2 Reference a dB meter to Line A or B
output.
12.3 Using the chart below, check the
frequency response.
F r e q
Min
1 KHz
0
400 Hz
-2.8
2 KHz
0.6
5 KHz
4.7
10 KHz
-2.8
13. Page Distortion
13.1 Apply a 1 KHz, 30mV signal to the
page input.
13.2 Measure THD+N at the Line output
≤
( should be
3.0 %).
4 8
7 2
m V
1 1
1 8
m v
1 0
1 7
m V
Max
Unit
0
Ref
-0.8
dBr
2.6
dBr
6.7
dBr
-0.8
dBr
14. Page Automatic Level Control
14.1 Apply a 1 KHz, 100mV signal to the
page input.
14.2 Reference a dB meter to the applied
signal.
14.3 Measure the Line output ( should be
≥
19.7 dB and
14
≤
21.7 dB ).