Kenwood TK-290-11B Service Manual page 22

Receiver Section
Item Condition
1. AF level 1) Set panel test mode
check CH No. : 3
Signaling No. : 1
SSG freq. : Each freq.
output : –53dBm/501µV
MOD. : 1kHz
DEV. : 2.4kHz
2. Hum and 1) Set panel test mode
noise ratio CH No. : 3
check Signaling No. : 1
SSG output : –53dBm/501µV
3. BPF coil 1) Set panel test mode
CH No. : 1
Use this Connect the spectrum
adjustment analyzer to TP3.
procedure Signaling No. : 1
after replace- Push Monitor to 3 point
ing any of adjustment mode
the BPF Select SNS 75
coils MON
4. Sensitivity 1) Set panel test mode
adjustment CH No. : 3
and check Signaling No. : 1
Select SNS ∗∗∗
in panel tuning mode
Push Monitor to 3 point
adjustment mode
Select SNS ∗∗∗
L MON
SSG freq. : Low
output : –116dBm/0.35µV
2) Push Tone 2 to select
SNS ∗∗∗
C MON
SSG freq. : Center
3) Push Tone 2 to select
SNS ∗∗∗
H MON
SSG freq. : Hi
5. Tight 1) Set panel test mode
squelch CH No. : 3
adjustment Signaling No. : 1
Select SQ T∗∗∗
in panel tuning mode
SSG output : 3dB above to
12dB SINAD level.
ADJUSTMENT
Measurement
Test-
Unit Terminal Unit
equipment
SSG Panel ANT
AF VTVM Side Universal
Oscilloscope
Distortion
meter
Audio
analyzer
Tracking Panel ANT TX-RX L201
generator
Spectrum TX-RX TP3
analyzer
SSG Panel ANT Panel
AF VTVM Side Universal
Oscilloscope
Distortion
meter
Audio
analyzer
TK-290-11B
Adjustment
Parts Method
Check 0.55V± 0.3V (VOL. 2)
5% or less
37dB or more
Adjust the BPF coil so that the waveform is peaked.
L202 The frequency with the peak waveform does not
L205 have to be the center frequency.
L206 After finished peaking the waveform, perform a
3 point adjustment and set for maximum sensitivity.
RX BPF 010.011
REF –10.0dBm ATT 10dB
10dB/
Center
TG LEVEL
–30dBm
Low
RBW
100kHz
VBW
10kHz
SWP
200ms
CENTER 155.0MHz
SW A/ Adjust for maximum 12dB SINAD or more
SW B SINAD
Adjust to point of
opening squelch
Specifications/Remarks
A write B blank
MKR
155.4MHz
–27.20dBm
Hi
SPAN 100.0MHz
21