Kenwood TK-D240, Service Manual

Page: 44 / 64

1-44 (No.RA035<Rev.001>)
4.14 Receiver Section
Item Condition Measurement Adjustment Specifications
/Remarks
Test-
equipment
Unit Terminal Unit Parts Method
1.
AF level
setting 1) Test Channel
Channel: 1
Test Signaling Mode: Analog
Signaling: 1
Wide 5k/Wide 4k/ Narrow:
Narrow Beat Shift: Uncheck
Compander: Uncheck
SSG output:-47dBm (1mV)
(MOD:1kHz/±1.5kHz) SSG
DVM AF VM
Dummy load ANT
SP/MIC
connec-
tor Vol-
ume
knob Turn the Volume knob
to obtain 1.0V AF out-
put. 1.0V±0.2V
2.
Sensitivity
1
(SENS1) 1) Adj item: [Sensitivity 1]
2) Adj item:[Low], [Low’], [Cen-
ter], [High’], [High]
Press [Apply All] button to
store the adjustment value. SSG
DVM AF VM
Dummy load ANT
SP/MIC
connec-
tor [FPU]
[<][>] Increase the adjust-
ment value from the
preset value to the first
12dB SINAD point with
SSG level -118dBm.
Preset value
Low : 50
Low' : 180
Center : 350
High’ : 480
High : 600
12dBSINAD Ad-
just@-118dBm
Caution:
Perform the adjust-
ment of “3. Sensitivi-
ty 2” before
performing this ad-
justment.
3.
Sensitivity
2
(SENS2) 1) Adj item: [Sensitivity 2]
2) Adj item:[Low], [Low’], [Cen-
ter], [High’], [High]
Press [Apply All] button to
store the adjustment value. SSG
DVM AF VM
Dummy load ANT
SP/MIC
connec-
tor [FPU]
[<][>] Write Preset value.
(Fixed value)
Low : 100
Low' : 240
Center : 365
High’ : 430
High : 520
4.*
RSSI Ref-
erence 1) Adj item:
[RSSI Reference (Analog Nar-
row)]
2) Adj item:[Low], [Low’], [Cen-
ter], [High’], [High]
SSG output:12dB SINAD level
-3dB (MOD:1kHz/±1.5kHz) SSG
DVM AF VM
Dummy load ANT
SP/MIC
connec-
tor [FPU]
[<][>] After input signal from
SSG, press [Apply]
button to store the ad-
justment value. *: Because RSSI
Reference (Analog
Wide 5k, Analog
Wide 4k and DMR) is
adjusted by adjust-
ing RSSI Reference
(Analog Narrow), it is
not necessary to ad-
just RSSI Reference
(Analog Wide 5k,
Analog Wide 4k and
DMR).
5.
Open
Squelch
(DMR) 1) Adj item:[Open Squelch
(DMR)]
2) Adj item:[Low], [Low’], [Cen-
ter], [High’], [High]
Reference SSG output:
12dB SINAD level@Analog
Narrow -3dB
(CW (without modulation)) SSG
Distortion
meter
Oscilloscope ANT
SP/MIC
connec-
tor [FPU]
[<][>] After input signal from
SSG, press [Apply]
button to store the ad-
justment value.
5.
Open
Squelch
(Analog
Narrow) 1) Adj item: [Open Squelch
(Analog Narrow)]
2) Adj item:[Low], [Low’], [Cen-
ter], [High’], [High]
SSG output:12dB SINAD level
+1dB (MOD:1kHz/±1.5kHz) SSG
Distortion
meter
Oscilloscope ANT
SP/MIC
connec-
tor [FPU]
[<][>] After input signal from
SSG, press [Apply]
button to store the ad-
justment value.