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3-2-1. TUN-8 Board Adjustment
Preparation
Before the adjustments, perform the followings.
• Remove the case and front panel.
• Remove the case lid (Precision +P1.7x2: 8) of the unit
assembly. (Refer to the ''2-1. Removal".)
1. Front-end Adjustment
Equipment and Tools
• DC power supply +7.0 ± 0.1 Vdc
• Spectrum analyzer
• RF adjustment cable ( Part No. J-6400-680-A )
• Adjuster ( 0.4x1.3 mm ) : 1 ( Part No. 7-221-652-81 )
• Power supply/AF OUT connector
( Refer to the ''How to make power supply/AF OUT
connector" on page 3-1.)
Connection
BNC cable
Tracking
(Coaxial cable 5D-2V, within 1m)
generator
POWER
ANT IN A
CN102
Case
Spectrum
analyzer
RF adjustment cable
(J-6400-680-A)
TUN-8 board
DC power supply
+
–
+7.0 ±0.1 Vdc
WRR-855B
MUTING
ANT IN B
CN402
Case
Power supply/AF OUT connector
Adjustment Location
ANT IN A
CT101
CT102
CT104
CT103
TUN-8 board
Switch and Control Setting
Channel setting:
CE21 model; Group 00, 22-32 channel (482.000 MHz)
CE33 model; Group 00, 34-32 channel (578.000 MHz)
CE62 model; Group 00, 63-32 channel (810.000 MHz)
CE67 model; Group 00, 68-32 channel (850.000 MHz)
U14 model; Group 00, 16-01 channel (482.125 MHz)
U30 model; Group 00, 32-01 channel (578.125 MHz)
U42 model : Group 00, 44-01 channel (650.125 MHz)
U62 model; Group 00, 64-01 channel (770.125 MHz)
U66 model; Group 00, 68-01 channel (794.125 MHz)
Procedure
Step1: Preparation
Turn off the POWER switch of the WRR-855B, and
change the position of the soldering bridge to the printed
slit land on the TUN-8 board from 1 to 2 as shown
below.
ANT IN A side
ANT IN A
1
2
ANT IN B
CT404
CT403
CT401
CT402
ANT IN B side
ANT IN B
1
2
3-3
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