Kenwood TKR-850 Service Manual page 41

Item Condition
14. MCF 1) Connect the TG to CN2, then Tracking
(Wide) connect CN4 to the spectrum generator
analyzer input.
CH : 2 (Wide)
Spectrum analyzer setting
Span : 50kHz to 25kHz
Scale : 10dB to 2dB div
Center freq' : 44.850MHz
Tracking generator setting
Output : –30dBm
(Narrow) 2) CH : 2 (Narrow)
15. Discrimi- 1) Connect the SSG to RX ANT. SSG
nator CH : 2 (Wide)
SSG output : –53dBm/501µV
SSG MOD : 1kHz
SSG DEV : 3kHz
AF : 2V/4Ω
16. Threshold 1) Connect SSG to RX ANT.
squelch CH : 2 (Wide)
(Wide) SSG output : 4dB below to
12dB SINAD level
SSG MOD : 1kHz
SSG DEV : 3kHz
AF : 2V/4Ω
2) SSG : OFF
(Narrow) 3) CH : 2 (Narrow)
SSG output : 4dB below to
12dB SINAD level
SSG MOD : 1kHz
SSG DEV : 1.5kHz
AF : 2V/4Ω
4) SSG : OFF
17. Tight 1) Connect SSG to RX ANT.
squelch CH : 2 (Wide)
(Wide) SSG output : 7dB over to
12dB SINAD level
SSG MOD : 1kHz
SSG DEV : 3kHz
AF : 2V/4Ω
(Narrow) 2) CH : 2 (Narrow)
SSG output : 7dB over to
12dB SINAD level
SSG MOD : 1kHz
SSG DEV : 1.5kHz
AF : 2V/4Ω
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
Rear RX ANT TX-RX L14
(A/2)
Spectrum TX-RX CN2
analyzer (A/2) CN4
Rear RX ANT
AF VM TEST/SPKR
Distortion jack SPO
meter (pin 12)
SSG Rear RX ANT
Audio TEST/SPKR
analyzer jack SPO
VTVM (pin 12)
Oscilloscope
TKR-850
Adjustment
Parts Method
Adjust it to look like
L17 the wave Fig. 2.
L18 (Page 39)
L15 Adjust it to look like
L16 the wave Fig. 3.
L19 (Page 39)
L24 Adjust the distortion
to minimum.
PC adj.
Adjust to point of
closing squelch
Check Squelch must be closed.
PC adj.
Adjust to point of
closing squelch
Check Squelch must be closed.
PC adj.
Adjust to point of
opening squelch
PC adj.
Adjust to point of
opening squelch
Specifications/Remarks
41