Kenwood TM-731A Service Manual page 55

TM-731A/E
ADJUSTMENT
Measurement Adjustment
item Condition Test Specification/Remarks
equip-
ment Unit {Terminal} Unit Part Method
4, S-meter FREQ, 145.050 MHz (W) SSG Rear | TX-RX | TX-RX | VR2_ | Set to to S.1 position.
146.040 MHz (K,M,P) panel, ;
SSG -3 dBu SP Front | (144) | (144)
panel
SSG 25 dBy AlLLED light up.
5, Receiving 145.050 MHz (W) Oscillo- SINAD 12 dB or more
sensitivity 146.040 MHz (K,M,P} scope
; SSG ~10 dB Millivatt-
Adjust the band edge in the same way. {|_ ete"
Distortion
FREQ. 144.050 MHZ9 wy
145,950 MHz meter
144.040 MHz
447.940 MHz IK M.P)
6. Signal-to- 145.050 MHz (W)} S/N ratio of 46 dB or better
noise (S/N) 146.040 MHz {K,M,P}
ratio with SSG 60 dBz -
high-level AF 0.63 V/8 0
signal
Common Transmitter Adjustments
Measurement Adjustment
Item Condition Tast Specification/Remarks
equip-
ment Unit |Terminal) Unit Part Method
Transmission | 435.000 MHz (W) F.counter) Rear | ANT2 |TX-RX] TC1 | 435.000 MHz (W) +100 Hz
frequency 445.000 MHz (K,M,P) Dummy | panel (144) 445.000 MHz (K,M,P)
LO: ON / load
Make transmission.
144 MHz Transmitter Adjustments
Measurement Adjustment
Item Condition Test | Specification/Remarks
equip- r
ment Unit {Terminal} Unit Part Method
1-1. Transmis- | FREQ. 144.975 MHz (W) Power Rear | ANTt Final VR2 | POWER MAX. 55 W or more
sion out- 146.000 MHz (K,M,P) meter panel | (144) | (144)
put (HI HI/LO switch: HI Ammeter
power) Make transmission. (Use DC
Power 52W 52 W £1 W, less than 11.0A
supply : . . ;
having
ammeter)
1-2. Transmis- | FREQ. 144.975 MHz (W) Final VR4 |5 W Check +0.5 W
sion out- 146.000 MHz (K,M,P) (144)
put (LO HI/LO switch : LO
power) (When ''LOW"' appears on the dis-
play, start transmitting.)
FREQ. 144.000 MHz 4 wi 48~56 W, less than 11.0A
145.975 MHz
144.000 MHz
147.980 MHz 1(K-M.P)
Hi/LO switch : HI
Make transmission.
2, RF meter FREQ. 144.975 MHz (W) Power RF-7 light up.
146.000 MHz (K,M,P} meter or
HI/LO switch: LO dummy
Make transmission. toad (50
HW/LO switch: HI ohms) All LED light, up.
Make transmission.
55