ADJUSTMENT
Measurement
Test-
equipment Unit Terminal
Adjustment
Unit Parts Method Specifications/RemarksConditionItem
36
TK-480/481
1.Frequency 1)SYS – GRP : 4 – ✽f. counter Panel ANT Panel
Encoder
TK-480 ±100Hz
adjustment Select FREQ ✽ ✽ ✽ knob : 815.500MHz
in tuning mode. TK-481
PTT : ON : 899.025MHz
2.Maximum 1) SYS – GRP : 4 – ✽
Power meter
Check 3.0W or more
power check Select HPOW 256
in tuning mode. Ammeter Panel ANT
PTT : ON
3.TX high 1)SYS – GRP : 4 – ✽Panel
Encoder
2.5W ±0.1W
power Select HPOW ✽ ✽ ✽ knob 1.7A or less
adjustment in tuning mode.
PTT : ON
4.TX T/A 1) SYS – GRP : 4 – ✽
high power Select THPW ✽ ✽ ✽
adjustment in tuning mode.
PTT : ON
5.TX high 1)SYS – GRP : 1 – ✽, 7 – ✽Check 2.0~3.0W
power check TA mode : OFF and ON
(Press [A] key, then [C] key) 1.7A or less
PTT : ON
6.TX low 1) SYS – GRP : 4 – ✽Panel
Encoder
1.0W ±0.1W
power Select LPW ✽ ✽ ✽ knob 1.2A or less
adjustment in tuning mode.
PTT : ON
7.TX T/A 1) SYS – GRP : 4 – ✽
low power Select TLPW ✽ ✽ ✽
adjustment in tuning mode.
PTT : ON
8.TX low 1) SYS – GRP : 1 – ✽, 7 – ✽Check 0.5~1.5W
power check Low power (Press [B] key) 1.2A or less
TA mode : OFF and ON
(Press [A] key, then [C] key)
PTT : ON
Transmitter SectionCommon Section
1.Setting 1) BATT terminal voltage : 7.5V
Standard modulation
MOD : 1kHz
DEV : ±3kHz (TK-480)
±1.5kHz (TK-481)
2.VCO lock 1)SYS – GRP : 1 – 1
Power meter
TX-RX VC Check 0.5V or more.
voltage DVM
2)SYS – GRP : 7 – 1 4.3V or less.
PTT : ON
3)SYS – GRP : 7 – 1
TA mode : ON
PTT : ON
Measurement
Test-
equipment Unit Terminal
Adjustment
Unit Parts Method Specifications/RemarksConditionItem