Sony WRT-808A, Руководство по обслуживанию

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3-9 WRT-808A (U)
3-2-8. AF/PEAK and POWER/BATT
Indicators Check
Equipment and Tools
DC power supply
DC output Voltage: + 3.0
±
0.1 Vdc
DC ammeter
Audio analyzer
Modulation analyzer
MEASUREMENT: FM
MEASUREMENT RANGE: AUTO or
±
10 kHz
HPF: 50 Hz
LPF: 15 kHz or 20 kHz
DE EMPHASIS: 50 u s
Oscilloscope
MM-SMA (J) connector (Part No. J-6402-480-A)
SMA-BNC (J) connector (Part No. J-6402-490-A)
Connections
(For connecting the DC power supply, refer to the “preparations”
on page 3-2.)
Switch and Control Setting
The following setting is to be perform with the channel
select switches (S504 and S505).
Transmitting Channel setting:
U64 model: 65-01 channel (776.125 MHz)
U66 model: 67-01 channel (788.125 MHz)
U68 model: 69-01 channel (800.125 MHz)
RF power output switch (S401): 50 mW
Input LEVEL control (RV101): “ _ 60” (0 dB attenuation)
Turn the RV101 clockwise
fully.
Procedure
.....
AF/PEAK indicator check
(1) Connect the audio analyzer (oscillator) to the MIC input
connector (CN101).
(2) Increase gradually the output level from the audio ana-
lyzer (oscillator), and check that the output level of the
oscillator is as follows when the AF/PEAK indicator
LED (D503) lights.
AF/PEAK indicator LED Audio analyzer(oscillator)
(D503) (MIC input connector input level)
Goes out. Less than
_
60 dBV (
_
57.8 dBm)
±
2.0 dB
Lights in green More than or equal to _ 60 dBV
( _ 57.8 dBm)
±
2.0 dB
Lights in red More than or equal to
_
24 dBV
(
_
21.8 dBm)
±
2.0 dB
..... POWER/BATT indicator check
(1) Decrease gradually the DC output level of the DC regu-
lated power supply from 3.0 V, and check that the DC
output level of the DC regulated power supply is as fol-
lows when the POWER/BATT indicator LED(D502)
lights.
POWER/BATT indicator LED DC power supply voltage of
(D502) DC regulated power supply
Lights in green. More than or equal to 2.1 V
(Less than 3.0 V)
Lights in red. Less than or equal to 2.0 V
±
0.1 V
Flashing in red Less than or equal to 1.8 V
±
0.2 V
Goes out. Less than or equal to 1.2 V
±
0.2 V
Modulation
analyzer
Oscilloscope
RF IN
AF OUT
MM-SMA (J) connector
with SMA-BNC (J) connector
CN402
MIC input
(CN101)
RF-90 Board
Audio analyzer
2 1
Oscillator
XLR 3Pin (male)
- wiring side -
3
Oscillator
Level meter
POWER/BATT (D502)
AF/PEAK (D503)