Kenwood FleetSync TK-790, Руководство по обслуживанию

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