Sony DWT-B30, Service Manual

Page: 47 / 98

4-15 (E)
DWT-B30
4-3-2. Radio Wave Check
Required equipment
.
Spectrum analyzer
.
Whip antenna
Setting of measuring device
.
SPAN: 4 GHz (Start Freq: 0 Hz)
.
RBW, VBW: 300 kHz
.
LEVEL: 14 dBm
.
TRACE: Peak HOLD
Measurement procedure
(1) Connect the whip antenna to the input terminal of spectrum analyzer.
(2) Turn on the power of this unit to enter the test mode. (Refer to Section 1-5.)
(3) Set the transmission power to 25 mW.
(4) The antenna portion of this unit is brought into contact with the whip antenna connected to the spec-
trum analyzer. Check that the peak power is within specification.
Specification: 0 dBm or more
4-3-3. Indicator Lighting Check
If there is any abnormality in the following items, a failure in the path of IC402 (CPU) → Q405 to Q407
→ D001/D002 (LED-498) on the DPR-396 board may have occurred. Perform the check focusing on this
path.
Indicator Check
AF indicator Check that the indicator lights up under the following conditions.
.
ATT: 0 dB
.
Input signal: 1 kHz, sin wave,
_
56 dBu
PEAK indicator Check that the indicator lights up under the following conditions.
.
ATT: 0 dB
.
Input signal: 1 kHz, sin wave,
_
24 dBu
POWER indicator Check that the indicator lights up when the power is turned on.
4-3-4. RF Remote Operation Check
Required equipment
.
DWR-R02DN/R03D that works properly
Measurement procedure
1. Prepare DWR-R03D.
2. Perform the pairing of the microphone and DWR-R03D by referring to the Operating Instructions.
3. Check that the control can be performed using the remote function.
n
If the paring is performed for the check procedure, the user’s pairing information is deleted.