Electrical Adjustment for AJ-BS900HEN & CA900HEN
ELE-21
7-9. Side tone Level Adjustment
(BS900H, CA900H)
BOARD
CAM POWER, CAM INCOM, BS AUDIO,
BS INCOM
TP
AJ-CA900H, BS900H INCOM connector
ADJ.
AJ-CA900H INCOM level knob (on Side panel)
VR3 [ENG SIDE TONE] : CAM POWER
VR5 [BS SIDE TONE] : BS AUDIO
INPUT
AJ-CA900H, BS900H INCOM connector
M. EQ
Audio Analyzer
SPEC.
A = -6 +/- 1dBm
SW Setting
1. Set switches on the CAM INCOM BOARD as
shown below.
SW Setting BOARD
SW1 [DM/CM] CM CAM INCOM
MIC SW ON CA900H
side panel
SW1 [ENG] 4W BS AUDIO
SW2 [ENG RTS LOAD] ON BS AUDIO
SW2 [DM/CM] CM BS INCOM
INCOM OUT SW OFF BS900H
front panel
Output Setting
2. Connect INCOM connector 4 pin [INCOM
RECEIVE (H)] and 5pin [PGM/RECEIVE (C)] of
AJ-CA900H to OUTPUT A connector of audio
analyzer.
3. Set output parameters of audio analyzer as shown
below.
FUNCTION : OSC
FREQUENCY RANGE : X100
OUTPUT MODE : A
OUTPUT LEVEL : -10dB
FREQUENCY : 1000Hz
LEVEL METER : 0dBm
LOAD : OFF
INPUT Setting
4. Connect INCOM connector 1 pin [GND] and 2 pin
[INCOM TALK] of AJ-CA900H to INPUT connector
of audio analyzer.
5. Set input parameters of audio analyzer as shown
below.
FUNCTION : LM
INPUT IMPEDANCE : 10kΩ
FILTER : FLAT
LM/DM RANGE : AUTO
6. Adjust INCOM level knob of AJ-CA900H so that
the audio level is “0 +/- 0.5dBm”.
7. Adjust VR3 [ENG SIDE TONE] so that the side
tone audio level A is within the specification.
8. Connect INCOM connector 4pin [INCOM
RECEIVE (H)] and 5pin [PGM/RECEIVE (C)] of
AJ-BS900H to OUTPUT A connector of audio
analyzer.
9. Connect INCOM connector1pin [GND] and 2pin
[INCOM TALK] of AJ-BS900H to INPUT A
connector of audio analyzer.
10. Confirm parameter setting of audio analyzer as
follows.
Output Setting
FUNCTION : OSC
FREQUENCY RANGE : X100
OUTPUT MODE : A
OUTPUT LEVEL : -10dB
FREQUENCY : 1000Hz
LEVEL METER : 0dBm
LOAD : OFF
Input Setting
FUNCTION : LM
INPUT IMPEDANCE : 10kΩ
FILTER : FLAT
LM/DM RANGE : AUTO
11. Adjust VR5 [BS SIDE TONE] so that the side tone
audio level A is within the specification.
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