Kenwood TH-K4AT Service Manual page 37

Item Condition
Switch to Adjustment mode
and carry out the operations
for adjustment item D.
(Refer to page 29)
S-meter 3) LCD display: S1
Frequency: 435.050MHz
SSG: –120dBm (0.22uV)
4) LCD display: S9
Frequency: 435.050MHz
SSG: –105dBm (1.26uV)
4.Squelch Squelch level: 1
Check 1) Frequency: 435.050MHz
SSG output: –123dBm (0.158uV) Oscilloscope
SSG MOD: 1kHz
SSG DEV: 3kHz
2) SSG: OFF
5.S-meter 1) Frequency: 435.050MHz
Check SSG output: –120dBm (0.22uV)
2) SSG output: –105dBm (1.26uV)
6.Hum and 1) Frequency: 435.050MHz
noise ratio SSG output: –53dBm (501uV) Oscilloscope
Check SSG MOD: 1kHz
SSG DEV: 3kHz
AF Output: 0.63V/8Ω
AF V.M = 0dB
2) SSG DEV: OFF
7.AF distortion 1) Frequency: 435.050MHz
Check SSG output: –53dBm (501uV)
SSG MOD: 1kHz
SSG DEV: 3kHz
AF Output: 0.63V/8Ω
8.AF output 1) Frequency: 435.050MHz
Check SSG output: –53dBm (501uV)
SSG MOD: 1kHz
SSG DEV: 3kHz
AF distortion: 10%
9.Current Squelch level: 5
Drain 1) Frequency: 435.050MHz
Check SSG output: OFF
2) Frequency: 435.050MHz
SSG output: –53dBm (501uV)
SSG MOD: 1kHz
SSG DEV: 3kHz
VOL knob: Max
ADJUSTMENT
Measurement
Test equipment Unit Terminal
SSG TX-RX ANT
(A/3)
SSG
Distortion meter
SSG
SSG TX-RX ANT
(A/3) SP
Distortion meter
AF V.M
SSG
Am meter
TH-K4AT/K4E
Adjustment
Unit Parts Method
[MENU] Write
[MENU] Write
Check
Check
Check
Check
Check
Check
Specifications/
Remarks
Open Squelch
Close Squelch
Two segments
in S-meter light.
All segments in
S-meter light.
–38dB or less
5% or less
400mW or more
80mA or less
400mA or less
37