Kenwood TH-K2AT, Service Manual

Page: 36 / 63

TH-K2AT/K2E/K2ET
36
ADJUSTM ENT
Receiver section
Item Condition
M easurement Adjustment
Specifications/
Test equipment Unit Terminal Unit Parts M ethod
Remarks
1.RX BPF Squelch level: 0
Adjust 1) Frequency: 145.050M Hz SSG TX-RX ANT VOL Turn the VOL knob 0.63V
(E, E3) Oscilloscope (A/3) SP knob to obtain 0.63V AF
Frequency: 146.050M Hz Distortion meter output.
(K, K2, M , M 2) AF V.M
SSG output: –53dBm (501 uV) Dummy load
SSG M OD: 1kHz
SSG DEV: 3kHz
Sw itch to Adjustment mode
and carry out the operations
for adjustment item E.
(Refer to page 29)
2) LCD display: BPL Encoder Write M ax Sensitivity
Frequency: 136.050M Hz [M ENU]
SSG: –119dBm (0.25 uV)
3) SSG: –113dBm (0.501 uV) Check 12dB SINAD or
more
4) LCD display: BPC Encoder Write M ax Sensitivity
Frequency: 146.050M Hz [M ENU]
SSG: –119dBm (0.25 uV)
5) SSG: –120dBm (0.22 uV) Check 12dB SINAD or
more
6) LCD display: BPH Encoder Write M ax Sensitivity
Frequency: 160.050M Hz [M ENU]
SSG: –119dBm (0.25 uV)
7) SSG: –113dBm (0.501uV) Check 12dB SINAD or
more
2.IF response 1) Frequency : 144.050M Hz SSG Check 12dB SINAD or
Check SSG Frequency: 221.750M Hz Oscilloscope less
SSG output: –60dBm (224uV) Distortion meter Note: If the
SSG M OD: 1kHz specification is not
SSG DEV: 3kHz satisfied, repeat the
AF output: 0.63V/8
Ω
operations for
“ 1. RX BPF
Adjust” .
3.Squelch / Sw itch to Adjustment mode SSG ANT
S-meter and carry out the operations
Write for adjustment item C.
(Refer to page 28)
1) LCD display: SQ1 [M ENU] Write Note: In the
Frequency: 145.050M Hz Squelch adjust
(E, E3) ments, all 4
Frequency: 146.050M Hz adjusting points
(K, K2, M , M 2) including the S-
SSG: –125dBm (0.126uV) meter must be
2) LCD display: SQ2 [M ENU] Write adjusted.
Frequency: 145.050M Hz
Squelch
(E, E3)
Frequency: 146.050M Hz
(K, K2, M , M 2)
SSG: –120dBm (0.22uV)