Kenwood TK-790 Service Manual page 73

Item Condition
15. MSK 1) CH-SIG : 1-9
deviation Select MSDV_XXX
in tune mode
PTT : ON
Deviation meter filter
HPF : OFF
LPF : 15kHz
De-emphasis : OFF
2) Up/down knob : Set the narrow
n_ _
MSDV_XXX in tune mode
PTT : ON
16. Sensitivity 1) CH-SIG : 2-1
Select _ _L
SENS_XXX
in tune mode
SSG output : –116dBm/0.35µV meter
AF output : 2V/4Ω
2) CH-SIG : 1-1
Select _ _C
SENS_XXX
in tune mode
3) CH-SIG : 3-1
Select _ _H
SENS_XXX
in tune mode
4) CH-SIG : 1-1
Up/down knob : Set the narrow
n_C
SENS_XXX in tune mode
17. Squelch 1) CH-SIG : 1-1
tight point Select SQ_T_XXX
in tune mode
SSG output : Value when 6dB
is added from the sensitivity
value of 12dB SINAD.
2) Up/down knob : Set the narrow
n_ _
SQ_T_XXX in tune mode
18. Squelch 1) CH-SIG : 1-1
open point Select SQ_O_XXX
in tune mode
SSG output : Value when 3dB
is subtracted from the
sensitivity value of 12dB
SINAD.
2) Up/down knob : Set the narrow
n_ _
SQ_O_XXX in tune mode
3) SSG output : OFF
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
Power meter Rear ANT Panel
Deviation
meter
AF VTVM Panel MIC
AG
Oscilloscope
SSG Rear ANT
AF VTVM EXT.SP
Distortion
Oscilloscope
4Ω dummy
load
TK-790/
Adjustment
Parts Method
PF3 key Wide ±3.0kHz ± 0.1kHz
PF4 key
Narrow ±1.5kHz ± 0.05kHz
Wide low check SINAD 12dB or more
Wide center check
Wide high check
Narrow center check
Adjust to point of Set the value to 255.
opening squelch Adjust the SSG output to
"Condition".
Then, decrease the value to
the point of opening the
squelch.
Wide/Narrow check Squelch must be closed.
( B ) /H ( B )
Specifications/Remarks
73