Kenwood TK-290-11B, Service Manual

Page: 22 / 52

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