Sony WRT-800A User manual

WRT-800A
SERVICE MANUAL
AU Model

!WARNING
This manual is intended for qualified service personnel
only.
To reduce the risk of electric shock, fire or injury, do not
perform any servicing other than that contained in the
operating instructions unless you are qualified to do
so. Refer all servicing to qualified service personnel.

WRT-800A (AU)
TABLE OF CONTENTS
1. OPERATION INSTRUCTIONS
2. SERVICE OVERVIEW
2-1. Disassembly ................................................................................................2-1
2-2. Notes When Assembling Parts....................................................................2-3
3. ELECTRICAL ALIGNMENT
3-1. Equipment and Tools ..................................................................................3-1
3-2. Adjustment ..................................................................................................3-2
3-2-1. +3V (Vcc) Regulated Voltage Check........................................3-4
3-2-2. Carrier Frequency Adjustment ...................................................3-4
3-2-3. Reference Frequency Deviation Adjustment .............................3-5
3-2-4. Maximum Frequency Deviation Adjustment.............................3-5
3-2-5. Distortion Ratio Check...............................................................3-6
3-2-6. S/N Check ..................................................................................3-7
3-2-7. Frequency Characteristics Check ...............................................3-7
3-2-8. RF Power Output Adjustment ....................................................3-8
3-2-9. Tone signal Adjustment .............................................................3-8
3-2-10. Battery Alarm Signal Check ....................................................3-10
3-2-11. Spurious Emissions Check.......................................................3-11
4. BLOCK DIAGRAM
5. SEMICONDUCTOR PIN ASSIGNMENT
6. SCHEMATIC DIAGRAMS AND BOARD LAYOUTS
6-1. Board Layouts .............................................................................................6-1
6-2. Schematic Diagrams....................................................................................6-2
7. SPARE PARTS
7-1. Notes on Repair Parts..................................................................................7-1
7-2. Exploded View and Parts List.....................................................................7-2
7-3. Electrical Parts List .....................................................................................7-4
7-4. Supplied Accessories ..................................................................................7-6

WRT-800A (AU)
SECTION 1
OPERATING INSTRUCTIONS This section is extracted
from operation manual
1-1
3-860-354-31(1)
WRT-800A
1997 by Sony Corporation Printed in Japan
[AU66]
UHF Synthesized
Wireless Microphone
Operating Instructions
Introduction
The WRT-800A is a wireless microphone to be used
in combination with the WRR-800A/801A UHF
Synthesized Diversity Tuner for an 800 MHz band UHF
synthesized wireless microphone system for broadcast or
movie production purpose.
The WRT-800A can also be used in conventional Sony
Wireless Microphone System composed of the WRT-810A/
820A UHF Synthesized Transmitter, WRR-810A/820A/
840A/850A UHF Synthesized Diversity Tuner, etc.
Features
Easy selection of 102 channels
The microphone can operate on any one of 102 carrier
frequencies selected by a simple operation.
Operation powered by easily available battery
The built-in high-efficiency DC-DC converter allows stable
operation, for about 12 hours continuously, with just a
single LR6 (size AA) alkaline battery.
Remote battery alarm on tuner
This microphone has capability of transmitting “Battery
status information” to the WRR-800A/801A/850A to give
advance warning of battery depletion.
The information is sent to the WRR-800A/801A/850A in
approx. 1 hour advance to battery exhaust so that they can
safely replace battery of the microphone.
When the WRR-800A/801A/850A receives the
information, the LED and the LCD on the panel start
flashes.
RF carrier with tone signal
The unit transmits the RF carrier accompanied by a tone
signal, enabling the tuner with a tone squelch circuit to take
out only the target audio signal received.
Wide dynamic range and low noise
The compander (compressor/expander) system enables
transmission over a wide dynamic range with minimum
noise.
Compact helical antenna
Precautions
•
The unit is designed for use in ambient temperature
range of 0°C to 50°C (32°F to 122°F).
•
Do not place the unit on or near heat sources, such as
lighting equipment, power amplifiers, or in a place
subject to direct sunlight or excessive moisture. In such
places, the external finish or internal parts of the unit
may be damaged.
•
If the unit is used in a very humid or dusty place or in a
place subject to an active gas, clean its surface as well as
the connectors with a dry, soft cloth soon after use.
Lengthy use of the unit in such places or not cleaning it
after its use in such places may shorten its life.
•
When cleaning the unit, never use organic solvents such
as thinner or benzine, which will damage the finish of the
unit.
•
The unit has been factory adjusted precisely. Do not
tamper with its internal parts or attempt to repair it.
Power Supply
The microphone can operate on one LR6 (size AA) alkaline
battery continuously for about 12 hours at 25°C (77°F).
Inserting the batteries
1Rotate the grip counterclockwise and slide it down.
Note
The grip may separate from the body. Be careful not to
drop it.
2Match the polarity and insert the battery.
3Return the grip to its original position and rotate it
clockwise to secure.
Battery indication
When you turn the power on, the power indicator lights.
When the battery level becomes low, the indicator goes off
as a warning. Promptly replace the battery if the power
indicator does not light when you turn the power on.
•The BATT indication on the WRR-800A/801A/850A
starts flashing in synchronization when the power
indicator of this wireless microphone goes off.
2
2
01
68
69 CH01-47
4
0 4
3
13
5
0
3
47
2 8
6
19
Battery compartment
Parts Identification
68
69 CH01-47
2
2
014
0 4
3
1 3
5
0
347
2 8
6
19
S
1Power indicator
2Power switch
3Channel select switches
4Screwdriver compartment (rear)
Battery compartment
Antenna
Grip
1Power indicator
Lights when the power of the wireless microphone is turned
ON. Promptly replace the battery if the indicator does not
light even when you turn the power on.
2Power switch
Turns the power of the wireless microphone ON or OFF.
3Channel select switches
For setting the transmitting channel.
4Screwdriver compartment
To store the supplied screwdriver for channel setting.
Removing/storing the screwdriver
To remove To store

WRT-800A (AU) 1-2
Notes on Use
On channel selection
•
The microphone/transmitter and tuners are classified by
frequency band.
A 14-MHz frequency band (or two consecutive-
numbered TV channels, such as 66 and 67 of the WRT-
800A) is assigned to each microphone/transmitter and
tuner model.
In building up a UHF wireless microphone system, be
sure to combine a microphone/transmitter and a tuner
having the same TV channel number.
•
Make sure that the channel selected on the microphone is
the same as that selected on the tuner used in the same
system.
•
Depending on the noise or interference conditions, the
selectable channels may not necessarily all be usable. If
necessary, you can determine the usable channels by
stepping the channel selection through a number of
channels on a tuner with the microphone set to OFF.
Those channels on which the RF indicator of the tuner
does not light are usable.
•
If there is a TV broadcasting station near by, do not use
the station’s channel.
On microphone system operation
•
To operate with 2 or more channels, maintain a distance
of at least 30 cm (1 ft.) between each pair of microphones.
For details of operation with 2 or more channels, refer to
the Operating Instructions for the WRR-800A/801A/850A
UHF Synthesized Diversity Tuners.
•
Ensure that the tuners set to channels not being used are
either turned off or set to the minimum output level.
•
When powering the microphone on or off, to keep the
noise to a minimum, set the audio output level from the
tuner or mixer to a minimum.
•
Powering the microphone on without checking the
channel selection first may interfere with the operation of
other microphones/transmitters, if the current setting is
already being used.
•
Separate the reception antennas and the microphone by
more than 3 m (10 ft.).
On battery
•
Use a new alkaline battery, and check the recommended
“useby” date on the bottom of the battery.
•
Be careful to insert the battery with the correct polarity.
•
When not using the wireless microphone for a long period,
remove the battery to avoid leakage. If a battery does leak,
clean all leakage from the unit and insert new battery.
Leakage left in the unit may cause poor battery contact. If
there seems to be poor battery contact, consult your Sony
dealer.
On the antenna
Do not touch the antenna while using as it will significantly
degrade good performance, causing drop outs, etc.
The WRT-800A can transmit on any selected wireless
channel among those listed below.
Channels and Carrier
Frequencies
S
WL Channel Frequency (MHz) WL Channel Frequency (MHz)
66-01 792.250 67-01 799.250
66-02 792.375 67-02 799.375
66-03 792.500 67-03 799.500
66-04 792.625 67-04 799.625
66-05 792.750 67-05 799.750
66-06 792.875 67-06 799.875
66-07 793.000 67-07 800.000
66-08 793.125 67-08 800.125
66-09 793.250 67-09 800.250
66-10 793.375 67-10 800.375
66-11 793.500 67-11 800.500
66-12 793.625 67-12 800.625
66-13 793.750 67-13 800.750
66-14 793.875 67-14 800.875
66-15 794.000 67-15 801.000
66-16 794.125 67-16 801.125
66-17 794.250 67-17 801.250
66-18 794.375 67-18 801.375
66-19 794.500 67-19 801.500
66-20 794.625 67-20 801.625
66-21 794.750 67-21 801.750
66-22 794.875 67-22 801.875
66-23 795.000 67-23 802.000
66-24 795.125 67-24 802.125
66-25 795.250 67-25 802.250
66-26 795.375 67-26 802.375
66-27 795.500 67-27 802.500
66-28 795.625 67-28 802.625
66-29 795.750 67-29 802.750
66-30 795.875 67-30 802.875
66-31 796.000 67-31 803.000
66-32 796.125 67-32 803.125
66-33 796.250 67-33 803.250
66-34 796.375 67-34 803.375
66-35 796.500 67-35 803.500
66-36 796.625 67-36 803.625
66-37 796.750 67-37 803.750
66-38 796.875 67-38 803.875
66-39 797.000 67-39 804.000
66-40 797.125 67-40 804.125
66-41 797.250 67-41 804.250
66-42 797.375 67-42 804.375
66-43 797.500 67-43 804.500
66-44 797.625 67-44 804.625
66-45 797.750 67-45 804.750
66-46 797.875 67-46 804.875
66-47 798.000 67-47 805.000
66-48 798.125 67-48 805.125
66-49 798.250 67-49 805.250
66-50 798.375 67-50 805.375
66-51 798.500 67-51 805.500
Specifications
Transmitter and modulator section
Oscillator Crystal controlled PLL synthesizer
Carrier frequencies 792.250 to 805.500 MHz
(102 settings at 125 kHz intervals)
Tone signal 32.768 kHz
Type of emission 110KF3E
RF power output 5 mW
Frequency stability Within ±0.002%
Type of antenna
1
/ 4 -wavelength helical
Pre-emphasis 50 µs
Reference deviation ±5 kHz (94 dB SPL, 1 kHz)
(0 dB SPL = 2 ×10
–5
Pa)
Frequency response 100 to 13,000 Hz
Signal-to-noise ratio 57 dB or more
(A-weighted, with reference
deviation at WRR-800A/801A)
Maximum input 128 dB SPL (1 kHz)
Microphone unit Electret condenser microphone
Directivity Uni-directional
Power section
Power requirements 1.5 V DC
(one LR6/size AA alkaline battery)
Battery life Approx. 12 hours at 25°C (77°F)
with Sony LR6 alkaline battery
General
Operating temperature 0°C to +50°C (32°F to 122°F)
Storage temperature –30°C to +60°C (–22°F to +140°F)
Dimensions 55 ×216 mm (2
1
/ 4 ×8
5
/ 8 inches)
(Maximum dia. ×length)
Mass Approx. 200 g (7.1 oz) including
battery
Supplied accessories
Microphone holder (1)
Stand adaptor PF
1
/ 2 to W
3
/ 8 (1)
Screwdriver (1)
Operating Instructions (1)
Design and specifications are subject to change without
notice.
Channel Setting
Check that the power is off and set the channel select
switches for the desired channel using the supplied
screwdriver.
Set the upper slide switch to 66 or 67 and set the rotary
switches to the last two digits of the desired wireless
channel.
Example: To set to channel 66-05
Notes
•
Turn off the microphone when setting the transmitting
channel to eliminate interference or noise on other
wireless equipment.
If the channel select switches are operated while the
microphone is on, the power indicator flashes as a
warning.
•
If you set to any channel other than those listed in the
table on the page on the rear, the power indicator flashes
as a warning.
•
The microphone does not transmit while the power
indicator is flashing.
6766
5
0
347
28
6
19
5
0
3
47
28
6
19
05

WRT-800A (AU)
2-1
Capsule Ass’y
Grip A, Antenna
Grip B, Switch Cover, Switch Knob
2-1. Disassembly
Cage Ass’y
SECTION 2
SERVICE OVERVIEW
Cage ass’y
Ornamental seal
Antenna
Grip A
* Tools Required
.LR screwdriver (Sony part No. : J-6402-350-A)
Switch cover
Grip B
When the grip B is moved
in the direction of the
arrow 1the switch cover
is raised up.
Switch cover
Stick light Switch knob
Grip B
LR small screw*
Remove the grip B straight out
in the direction of the arrow.
Grip B
Nameplate
1
Stop ring pliers
(Sony part number:
7-721-010-07)
Type-C
stop ring
Adjustment ring
Adhesive seat ring
3-pin
connector
Tweezers
Pad rubber
Inner Net
Capsule ass’y
Harness
Unsolder.
White Red
Capacitor
(680 pF) Black
(harness)
Capsule ass’y
Type-C
stop ring
Ferrite Bead

WRT-800A (AU) 2-2
AU-258 Board, RF-87 Board, Chassis A, Chassis B
Apply pressure from both sides of the
chassis B until the chassis B is opened
in the direction of arrow 1so as not to
damage the connector and pin.
Then remove the chassis B.
Chassis B
Chassis A
AU-258 board Chassis A
RF-87 board
Chassis B
Remove the board
so as not to break
the claws.
RF-87 board
Chassis B
Claw
Switch label
Claw
Chassis A AU-258 board (A Side)
L202
Claw
AU-258 board (A Side)
Unsolder.
Remove the board so
as not to break the claws.
AU-258 board
AU-258 board
(B Side)
Unsolder.
+P 1.7x2
ANT terminal relay
Chassis A
Battery coil spring
Battery coil spring
Lug ø2
Battery seal
Chassis A
Claw
O-ring
Plate, stick
Magnet
Plus (+) polarity terminal plate
Press down the dented portion
in the center of the plus (+)
polarity terminal plate in the
direction of the arrow using
a screwdriver tip.
Switch driver
Chassis B
+P 1.7x2
Unsolder.
Claw
Vinyl-chloride sheet
1

WRT-800A (AU)
2-3
2-2. Notes When Assembling Parts
1. Positive (+) polarity terminal plate, battery coil spring
2. RF-87 board
Align the 4 cut-outs of the board
with the 4 protrusions as shown
by the arrow, and attach
the RF-87 board under
the 2 claws shown
by the asterisk
(*) mark.
RF-87 board
Chassis B
Chassis B
Fit and insert the
RF-87 board in the
hole of the chassis B
while taking care not to
bend the legs of the
LED indicator.
RF-87 board
*
*
3. AU-258 Board
AU-258 board
Chassis A
Insert it beneath the positive (+) polarity terminal plate.
AU-258 board Chassis A
Positive (+) polarity terminal plate
When attaching the AU-258 board to the chassis A,
insert the AU-258 board in the order of 1and 2
in the direction of the arrow as shown.
n
The chassis A is made of material
which is fragile to heat. Avoid applying
high temperature for extended period
during soldering.
Tip of the positive (+) polarity terminal plate
L202
Solder here.
Chassis A
Be careful not to pinch the harness
between the chassis A and the
AU-258 board.
Align the 4 cut-outs of the board with the 4 protrusions
as shown by the arrow, and attach the AU-258 board
under the 3 claws shown by the asterisk (*) mark.
2
1
*
*
*
Battery coil spring
Insert the battery
coil spring until it
enters beneath the
protrusion as shown
by the arrow.
Battery coil spring
Positive polarity terminal plate
1Bend the leg by 135 degrees to the
side as shown (in the direction of
arrow) in which center of the
positive (+) polarity terminal plate
is dented.
2Insert the positive (+) polarity
terminal plate deep enough until it
contacts with the chassis A which
is shown by the illustration.
Chassis A
Lug
Cut. Adhesive sheet
Apply following the bond.
Sony bond master
(Part No. 7-432-916-01)

WRT-800A (AU) 2-4
4. RF-87 Board, AU-258 Board 6. Capsule Ass’y
5. Grip B
When attaching the grip B to the chassis A and
to the chassis B, insert the chassis B in the direction of
the arrow while aligning the protrusion of the chassis B
with the cut-out of the grip B.
Stick light
Switch knob
Stick light
Adhere here.
Switch cover
Switch knob
Chassis A
Cut-out
Chassis B
Grip B
Protrusion
Attach the cut-out
portion to the stick
light side.
Capacitor (680 pF)
Capsule ass’y
White
Red
(Harness)
Black
Solder here.
Capsule ass’y
Harness
Pad rubber
Stop ring pliers
(Sony part number:
7-721-010-07)
Type-C stop ring
Type-C stop
ring
Insert the pad rubber to the
deep end without any clearance.
Attach the capsule
ass’y without any
clearance.
Grip B
Type-C stop ring
Ferrite Bead
Inner Net
Capsule ass’y
Ferrite Bead
Inner Net
Insert the AU-258 board harness and the 2-pin
socket (CN103) to the RF-87 board connector (CN302)
and to the SIL the 2-pin socket (CN401) securely and
attach the chassis B to the chassis A.
Socket pin: 2-pin (CN103)
AU-258 board
Harness
Chassis A
RF-87 board
Connector (CN302) Chassis B
SIL socket: 2-pin
(CN401)

WRT-800A (AU)
3-1. Equipment and Tools
Equipment Required
Name Specifications Model Name
DC POWER SUPPLY Output reagulated voltage: 0 to 5 V, 2 A _
DC CURRENT METER Measurement:300 mA _
SPECTRUM ANALYZER Frequency:10 kHz to 5 GHz ADVANTEST R3371A or equivalent
MODULATION ANALYZER RF input frequency:150 kHz to 3 GHz ANRITSU MS616A or equivalent
POWER METER WITH POWER SENSOR Range: 3 uW to 100 mW HP453B (Power sensor HP8482A) or equivlent
AUDIO ANALYZER .OSCILLATOR:20 Hz to 100 kHz HP8903B (with A-weighted)
.DISTORTION ANALYZER
.S/N METER
.LEVEL METER
FREQUENCY COUNTER Frequency : 10 Hz to 1000 MHz HP5358A or equivalent
Effetive digits :10 digits
OSCILLOSCOPE Frequency: DC to 10 MHz _
DC VOLT METER Effective digits: 3 1/2 digits _
Tools
Name Part No. Remarks
RF adjusting connector _See next page.
Adjustor 7-721-052-81 0.4x1.3mm
AF input connector _See next page.
LR screw driver J-6402-350-A For grip removal
Section 3
Electrical Alignment
3-1

WRT-800A (AU)
Solder.
Cable with SMA-P connector
Cable with SMA-P connector
Socket pin 2P
Socket pin 2P
bend by 90°
Cable with BNC connector
Shield
Solder.
White Black
Red
Sub harness
..
..
.How to make a RF adjusting connector
Requied Parts
Cable with SMA-P connector : 1 (Part No.J-6223-090-A)
Socket Pin 2P :1 (Part No.1-566-474-11)
..
..
.How to make an AF input connector
Required Parts
Cable with BNC connector : 1 (Part No.1-555-758-00)
Sub harness (3P) :1 (Part No.1-956-140-11)
3-2. Adjustment
This section describes adjustments and checks which must
be completed to assure that the specificatisons are
complied with.
Make adjustment and checks following the procedure
below:
3-2
+3V (Vcc) Regulated Voltage Check
Carrier Frequency Adjustment
Reference Frequency Deviation Adjustment
Maximum Frequency Deviation Adjustment
Distortion Ratio Check
S/N Check
Frequency Characteristics Check
RF Power Output Adjustment
Tone Signal Adjustment
Battery Alarm Signal Check
Spurious Emissions Check
3-2-1.
3-2-2.
3-2-3.
3-2-4.
3-2-5.
3-2-6.
3-2-7.
3-2-8.
3-2-9.
3-2-10.
3-2-11.

WRT-800A (AU)
1. Preparation
(1) When adjustments are performed, remove the AU-258 and RF-87 boards from WRT-800A unit.
Refer to the “Section 2 Service overview” for removal.
(2) Insert the harness of the AU-258 board into the connector CN302 on the RF-87 board.
The AU-258 and RF-87 boards must be connected electricalty as shown below.
(3) Connect the RF adjusting connector to the anntena connector (CN401/RF-87 board) as shown
below.
Required Parts
SMA (MALE) -BNC (FEMALE) Conversion connector : 1
(4) Connecting the DC power supply
Checking
After the DC power supply connection is complete,
set the power switch (S201/AU-258 board) to on, and
check the level on DC current meter.
DC current meter indication level: 70 to 90 mA
2. Adjustment Location
3-3
SMA-BNC conversion connector RF adjusting connector
RF-87 board (B side) AU-258 board (A side)
Harness
CN302
CN401
CN401
Solder.
DC power supply
DC current meter Lead wires
(30 to 80 mm)

+_
+_

DC power supply : +1.5±0.1 Vdc
DC current meter : 100 mA
RF-87 Board (B side) AU-258 Board (A side) CT301 (RF Frequency) CN101 (B side)
S201
RV401
(RF Power)
RF-87 Board (B side) AU-258 Board (A side)
1
1
1
CT401
(RF Power)
1
RV103
(Tone Dev)
1RV104
(Ref Dev)
1
1
RV101
(LIM Dev)
RV102
(CLP Dev)
S302
(A side)
S303
(A side) S301
(A side)
S304
(A side)

WRT-800A (AU)
3-2-1. +3V (VCC) Regulated Voltage Check
Equipment and Tools
DC power supply
DC output voltage:+1.5±0.1 Vdc
DC current meter
DC voltmeter
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Proceduer
(1) Set the POWER switch (S201/AU-258 board) to ON.
(2) Check that the DC voltage for check land (VCC)/AU-
258 board to the specified voltage as below.
Specification: DC voltage for check land (VCC)
=+3.0±0.1 Vdc
3-4
3-2-2. Carrier Frequency Adjustment
Equipment and Tools
DC power supply
DC output voltage:+1.5±0.1 Vdc
DC current meter
Frequency counter
Adjustor (SONY part No.7-721-052-81)
RF adjusting connector (See page 3-2.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Connections
(For connecting the DC power supply, refer to the “Prepa-
rations” on page 3-3.)
Procedure
(1) Connect the frequency counter to the CN401/RF-87
board (RF adjusting connector).
(2) Adjust 1CT301 so that the frequency counter reading
meets the following specification.
Specification:
Carrier frequency mentioned in the table as below.
WRT-800A Carrier frequency
AU66 model 799.250 MHz ±1 kHz (67-01CH)
Adjustment: 1CT301/RF-87 board (B side)
RF-87 Board
(B side) AU-258 Board (A side)
DC voltmeter
VCC
_
+
1
CT301
RF adjusting connector
SMA-BNC
conversion connector
Frequency counterRF-87 Board
(B side) AU-258 Board (A side)
CN401

WRT-800A (AU)
3-2-3. Reference Frequency Deviation
Adjustment
Equipment and Tools
DC power supply
DC output voltage:+1.5±0.1 Vdc
DC current meter
Audio analyzer
Modulation analyzer
MEASUREMENT : FM
MEASUREMENT RANGE : AUTO or ±10 kHz
HPF : 50 Hz
LPF : 20 kHz or 15 kHz
DE EMPHASIS : 50 us
Adjustor (SONY part No.7-721-052-81)
AF input connector (See page 3-2.)
RF adjusting connector (See page 3-2.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Connections
(For connecting the DC power supply, refer to the “Prepa-
rations” on page 3-3.)
Procedure
(1) Input 1 kHz, _43.5 dBV (_41.3 dBm) signal to the
CN101/AU-258 board with AF input connector.
n0 dBV=1 Vrms, 0 dBm=0.775 Vrms
(2) Adjust 1RV104 so that frequency deviation for the
modulation analyzer reading meets the following
specification.
Specification:Frequency deviation=±5 kHz±0.1 kHz
Adjustment :1RV104/AU-258 board (A side)
(3) After the adjustment has been completed, perform the
“3-2-4. Maximum Frequency Deviation Adjustment”.
3-2-4. Maximum Frequency Deviation
Adjustment
n
Be sure to perform this adjustment after “3-2-3. Reference
Frequency Deviation Adjustment” has been completed.
Equipment and Tools
DC power supply
DC output voltage : +1.5±0.1 Vdc
DC current meter
Audio analyzer
Modulation analyzer
MEASUREMENT : FM
MEASUREMENT RANGE : AUTO or ±100 kHz
HPF : 50 Hz
LPF : 20 kHz or 15 kHz
DE EMPHASIS : 50 us
Oscilloscope
Adjustor (SONY part No.7-721-052-81)
AF input connector (See page 3-2.)
RF adjusting connector (See page 3-2.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Connections
Same as “3-2-3.Reference Frequency Deviation
Adjustment”.
3-5
Level meter
Audio analyzer Oscillator AF input connector
RF adjusting Connector CN101
(B side)
SMA-BNC
conversion connector
Modulation
analyzer
Oscilloscope
RF-87 Board
(B side) AU-258 Board
(A side)RF IN
1
1
1
RV101
RV102
RV104

WRT-800A (AU)
Connections
(For connecting the DC power supply, refer to the “Prepa-
rations” on page 3-3.)
Procedure
(1) Connect the audio analyzer (distortion analyzer) to the
AF OUT connector for the modulation analyzer.
(2) Set the audio analyzer to distortion measurement
(DISTORTION mode).
(3) Input 1 kHz, _43.5 dBV(_41.3 dBm) signal to the
CN101/AU-258 board from audio analyzer (oscillator)
with AF input connector.
n0 dBV=1 Vrms, 0 dBm=0.775 Vrms
(4) Check that the distortion analyzer reading is less than
0.9 %.
Level meter
Audio analyzer Oscillator AF input connector
CN101
(B side)
SMA-BNC
conversion connector
Modulation analyzer
RF-87 Board
(B side) AU-258 Board
(A side)
Audio analyzer
Distortion
analyzer
Oscilloscope
RF adjusting connector
3-6
Procedure
(1) Input 10 kHz, _7.5 dBV(_5.3 dBm) signal to the
CN101/AU-258 board with AF input connector.
(2) Adjust 1RV102 so that the frequency deviation for the
modulation analyzer reading meets the following
specification.
Specification: Frequency deviation = maximum
Adjustment : 1RV102/AU-258 board (A side)
(3) Input 1 kHz, _7.5 dBV(_5.3 dBm) signal to the
CN101/AU-258 board with AF input connector.
(4) Adjust 1RV101 so that the frequency deviation for the
modulation analyzer reading meets the following
specification.
Specification: Frequency deviation =
±26 kHz±0.5 kHz
Adjustment : 1RV101/AU-258 board (A side)
(5) Adjust 1RV102 so that the frequency deviation for the
modulation analyzer reading meets the following
specification.
Specification: Frequency deviation =
±24.5 kHz±0.5 kHz
Adjustment : 1RV102/AU-258 board (A side)
3-2-5. Distortion Ratio Check
Equipment and Tools
DC power supply
DC output voltage:+1.5±0.1 Vdc
DC current meter
Audio analyzer
Modulation analyzer
MEASUREMENT : FM
MEASUREMENT RANGE : AUTO or ±40 kHz
HPF : 50 Hz
LPF : 20 kHz or 15 kHz
DE EMPHASIS : 50 us
Oscilloscope
AF input connector (See page 3-2.)
RF adjusting connector (See page 3-2.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01

WRT-800A (AU)
3-2-6. S/N Check
Equipment and Tools
Same as “3-2-5. Distortion Ratio Check” expect the
following setting.
Modulation analyzer
MEASUREMENT RANGE : ±10 kHz
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Connections
Same as “3-2-5. Distortion Ratio Check”.
Procedure
(1) Connect the audio analyzer (level meter) to the AF
OUT connector for the modulation analyzer.
(2) Input 1kHz, _43.5 dBV (_41.3 dBm) signal to the
CN101/AU-258 board from audio analyzer (oscillator)
with AF input connector.
n0 dBV=1 Vrms, 0 dBm=0.775 Vrms
(3) Set the audio analyzer to S/N measurement mode (with
A-weight filter ON).
(4) Check that the S/N reading is more than 32 dB.
3-2-7. Frequency Characteristics Check
Equipment and Tools
Same as “3-2-5. Distortion Ratio Check” expect the
following setting.
Modulation analyzer
MEASUREMENT RANGE : ±40 kHz
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Connections
Same as “3-2-5. Distortion Ratio Check”.
Procedure
(1) Connect the audio analyzer (level meter) to the AF
OUT connector for the modulation analyzer.
(2) Set the audio analyzer to level meter mode.
(3) Input the 1 kHz, _43.5 dBV (_41.3 dBm) signal to the
CN101/AU-258 board from audio analyzer
(oscillator).
(4) Reads the indication on the audio analyzer (level
meter).
(5) Set the SENSITIVITY on the audio analyzer (level
meter) so that the audio analyzer (level meter) reads
0 dB.
(6) Switch the oscillation frequency for the audio analyzer
(oscillator) from 1 kHz to 100 Hz.
(7) Check that audio analyzer (level meter) reading is
0±1.0 dB.
(8) Next, switch the oscillation frequency for the audio
analyzer (oscillator) from 100 Hz to 10 kHz.
(9) Check that the reading for the audio analyzer (level
meter) is _1.0±1.0 dB.
3-7

WRT-800A (AU)
3-2-8. RF Power Output Adjustment
Equipment and Tools
DC power supply
DC output voltage :+1.5±0.1 Vdc
DC current meter
Power meter (with power sensor)
RF adjusting connector (See page 3-3.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Connections
(For connecting the DC power supply, refer to the “Prepa-
rations” on page 3-3.)
Procedure
(1) Connect the power meter (with power sensor) to the
CN401/RF-87 board (RF adjusting connector).
(2) Adjust 1CT401 so that the power meter reading meets
the following specification.
Specification: Power meter reading = Maximum
Adjustment : 1CT401/RF-87 board (B side)
(3) Adjust 1RV401 so that the power meter reading meets
the following specification.
Specification: Power meter reading = 5.0±0.2 mW
Adjustment : 1RV401/RF-87 board (B side)
3-2-9. Tone signal Adjustment
Equipment and Tools
DC power supply
DC output voltage : +1.5±0.1 Vdc
DC current meter
Frequency counter
Spectrum analyzer
Modulation analyzer
RF adjusting connector (See page 3-2.)
1. Frequency deviation adjustment
Connections
(For connecting the DC power supply, refer to the “Prepa-
rations” on page 3-3.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
3-8
RF adjusting connector
SMA-BNC
conversion connector RF-87 Board
(B side) AU-258 Board (A side)
Spectrum analyzer
1RV103
RF adjusting connector
Power sensor
SMA-BNC
conversion connector
Power meter
RF-87 Board
(B side) AU-258 Board (A side)
1
1
RV401
CT401

WRT-800A (AU)
Procedure
(1) Set the spectrum analyzer as below:
CENTER FREQUENCY (fc) : 799.250 MHz
REFERENCE LEVEL : 20 dBm
FREQUENCY SPAN : 200 kHz(20 kHz/DIV)
RBW (resolution band width) : 3 kHz
VBW (video band width) : 1 kHz
ATT : 20 dB
(2) Adjust 1RV103/AU-258 board so that level between
carrier frequency (frequency center level) on spectrum
analyzer and tone signal is within 29 dB ±1 dB.
2. Frequency check
Connections
(For connecting the DC power supply, refer to the “Prepa-
rations” on page 3-3.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Procedure
(1) Set the modulation analyzer as below:
MEASUREMENT : FM
MEASUREMENT RANGE : 40 kHz
HPF : 4 kHz
LPF : >20 kHz
DE EMPHASIS : OFF
(2) Check that the frequency counter (resolution : 0.1 Hz
setting) reading is 32.768 kHz±1 Hz.
3-9
RF adjusting connector
SMA-BNC
conversion connector RF-87 Board
(B side) AU-258 Board (A side)
Modulation analyzer Frequency counter
RF IN AF OUT
20 dBm
29 dB ±1 dB
V : 10 dB/div
H : 20 kHz/div
fc
32.768 kHz

WRT-800A (AU)
3-2-10.Battery Alarm Signal Check
Equipment and Tools
DC power supply
DC output voltage:+1.5±0.1 Vdc
DC current meter
Frequency Counter
Spectrum analyzer
Modulation analyzer
RF adjusting connector (See page 3-2.)
1. Frequency deviation check
Connections
(For connecting the DC supply, refer to the “Preparations”
on page 3-3.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Procedure
(1) Set the spectrum analyzer as below:
CENTER FREQUENCY (fc) : 799.250 MHz
REFERENCE LEVEL : 20 dBm
FREQUENCY SPAN : 200 kHz (20 kHz/DIV)
RBW (resolution band width) : 3 kHz
VBW (video band width) : 1 kHz
ATT : 20 dB
(2) Decrease gradually the DC output voltage of the DC
regulated power supply and confirm that the battery
alarm signal turns on at 1 V±0.1 V.
(3) Check that level difference between carrire frequency
(center frequency level) on spectrum analyzer and
battery alarm signal is within 29 dB ±1 dB.
RF adjusting connector
SMA-BNC
conversion connector
RF-87 Board
(B side) AU-258 Board (A side)
Spectrum analyzer
Connect a jumper wire
between TONE land and
GND land by soldering.
(TONE signal OFF)
TONE
3-10
20 dBm
29 dB ±1 dB
V : 10 dB/div
H : 20 kHz/div
fc
32.782 kHz

WRT-800A (AU)
2. Frequency check
Connections
(For connecting the DC supply, refer to the “Preparations”
on page 3-3.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Procedure
(1) Set the modulation analyzer as below:
MEASUREMENT : FM
MEASUREMENT RANGE : 40 kHz
HPF : 4 kHz
LPF : >20 kHz
DE EMPHASIS : OFF
(2) Set the DC output voltage of DC power supply to 1V
±0.1 V so that battery alarm signal goes on.
(3) Check that the frequency counter (resolution : 0.1 Hz)
reading is 32.782 kHz±1 Hz.
(4) After the checking, remove (unsolder) the jumper wire
between TONE and GND on the AU-258 board.
3-11
RF adjusting connector
SMA-BNC
conversion connector
RF-87 Board
(B side) AU-258 Board (A side)
Modulation analyzer Frequency counter
RF IN AF OUT
Connect a jumper wire
between TONE land and
GND land by soldering.
(TONE signal OFF)
TONE
3-2-11.Spurious Emissions Check
Equipment and Tools
DC power supply
DC output voltage:+1.5±0.1 Vdc
DC current meter
Spectrum analyzer
RF adjusting connector (See page 3-2.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A S301 S302 S303 S304 Channel
setting
AU66 model _0 1 OFF 67-01
Connections
(For connecting the DC power supply, refer to the “Prepa-
rations” on page 3-3.)
RF adjusting connector
SMA-BNC
conversion analyzer
Spectrum analyzer
RF-87 Board
(B side) AU-258 Board (A side)