Kenwood TH-K4AT Service Manual page 36

TH-K4AT/K4E
Receiver section
Item Condition
1.RX BPF Squelch level: 0
Adjust 1) Frequency: 435.050MHz
SSG output: –53dBm (501 uV) Oscilloscope
SSG MOD: 1kHz
SSG DEV: 3kHz
Switch to Adjustment mode
and carry out the operations
for adjustment item E.
(Refer to page 29)
2) LCD display: BPL
Frequency: 400.050MHz
SSG: –119dBm (0.25 uV)
3) SSG: –110dBm (0.707 uV)
4) LCD display: BPC
Frequency: 435.050MHz
SSG: –120dBm (0.22 uV)
5) SSG: –120dBm (0.22 uV)
6) LCD display: BPH
Frequency: 469.990MHz
SSG: –121dBm (0.199 uV)
7) SSG: –113dBm (0.501uV)
2.IF response 1) Frequency : 469.990MHz
Check SSG Frequency: 450.565MHz Oscilloscope
SSG output: –53dBm (501uV) Distortion meter
SSG MOD: 1kHz
SSG DEV: 3kHz
AF output: 0.63V/8Ω
2) Frequency : 400.050MHz
SSG Frequency: 380.625MHz
SSG output: –53dBm (501uV)
3) Frequency : 435.000MHz
SSG Frequency: 415.575MHz
SSG output: –53dBm (501uV)
3.Squelch / Switch to Adjustment mode
S-meter and carry out the operations
Write for adjustment item C.
(Refer to page 28)
1) LCD display: SQ1
Frequency: 435.050MHz
SSG: –125dBm (0.126uV)
Squelch 2) LCD display: SQ2
Frequency: 435.050MHz
SSG: –120dBm (0.22uV)
36
ADJUSTMENT
Measurement
Test equipment Unit Terminal
SSG TX-RX ANT
(A/3) SP
Distortion meter
AF V.M
Dummy load
SSG
SSG ANT
Adjustment
Unit Parts Method
VOL Turn the VOL knob 0.63V
knob to obtain 0.63V AF
output.
Encoder Write
[MENU]
Check
Encoder Write
[MENU]
Check
Encoder Write
[MENU]
Check
Check
[MENU] Write
[MENU] Write
Specifications/
Remarks
Max Sensitivity
12dB SINAD or
more
Max Sensitivity
12dB SINAD or
more
Max Sensitivity
12dB SINAD or
more
12dB SINAD or
less
Note: If the
specification is not
satisfied, repeat the
operations for
"1. RX BPF
Adjust".
Note: In the
Squelch adjust
ments, all 4
adjusting points
including the S-
meter must be
adjusted.