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Condition
16. Sensitivity
1) Test mode
CH-SIG : Low - 1
SSG output : –116dBm/0.35µV AF VTVM
AF output : 2V/4Ω
2) Test mode
CH-SIG : Center - 1
3) Test mode
CH-SIG : High - 1
4) Up/down knob : Set the narrow
n_C
CH-SIG : Center - 1
17. Squelch
1) CH-SIG : Center - 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 : Center - 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
Remarks : When revising the BPF bandwidth, ensure that squelch is adjusted to the *Center CH of the bandwidth.
(*see adjusting procedure 5.)
ADJUSTMENT
Measurement
Test-
Unit
Terminal
Unit
equipment
SSG
Rear
ANT
EXT.SP
Distortion
meter
Oscilloscope
4Ω dummy
load
TK-890/
(
Adjustment
Parts
Method
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
75
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