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TK-3148
Receiver Section [Panel Tuning Mode except when Panel TEST Mode is specified.]
Item
Condition
1. Sensitivity
1) Adj item [SENS]
Adjust
Adjust [∗∗∗]
(BPF
characteristic) 2) Low-edge frequency
Adj item
[L SENS] ➞ [L2 SENS] ➞
[C SENS] ➞ [H2 SENS] ➞
[H SENS]
Spe-Ana setting
Center·f : 370MHz
Span
RBW
VBW
REF level : –40dBm
ATT
Tra-G setting
Input level: –40dBm
2. Sensitivity
[Panel Test Mode]
Check
1) CH-Sig:1-1
SSG OUT
Wide: -117dBm(0.28µV)
(MOD:1kHz / ±3kHz)
Narrow: -116dBm(0.316µV)
(MOD:1kHz / ±1.5kHz)
3. Squelch
1) Adj item [SQL]
(Preset)
Adjust [∗∗∗]
Adjust
SSG OUT:
[Narrow]
12dB SINAD level
2) Adj item
[L SQL] ➞ [C SQL] ➞ [H SQL]
Adjust [∗∗∗]
[Wide]
3) Adj item [w SQL]
Adjust [∗∗∗]
12dB SINAD level
4) Adj item
[wL SQL] ➞ [wC SQL] ➞ [wH SQL]
Adjust [∗∗∗]
48
ADJUSTMENT
Test equipment
Tracking
generator
Specturm
analyzer
: 100MHz
: 100kHz
: 1kHz
: 0dB
SSG
AF VTVM
Oscilloscope
Measurement
Unit
Terminal
Unit
Panel
ANT
Panel
TX-RX
BPF
Need couple
capacitor
(1000PF)
C
L2
L
H2
H
Band Pass Filter Characteristic (C)
Panel
ANT
Universal
connector
Adjustment
Specifications/
Parts
Method
Adjustment
Encoder
knob
fo=f L, f L2, f C, f H2, f H
Adjust point frequency
Refer to the Panel Tuning Mode
frequency table on page 43.
Check
12dB SINAD or
more
Encoder
Adjust to point
knob
of opening
squelch
Remark
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