Kenwood TS-830S Service Manual page 38

Item
- -
Condltlon
SSG output: 4 0 dB
22. NB
adjustment
Test
equipment
-
Measurement
Unit
Specif~cation
Adjustment
Method
Turn the coil slug
counterclockwi~e
until S-1 is obtained.
Set to S-9
Ter-
minal
Unit
IF
This adjust-
ment requires
the use of the
VET-1 If the
VET- 1 is un-
available, this
adjustment
will be difficult.
Remarks
Parts
L9
VR3
*
Repeat S- 1, 9 adjustment
r -
The NB must
provide adequate
effect.
Noise must be
blanked.
AF
Rear
panel
several times.
NB LEVEL. fully counter-
clockwise
BAND 14, VFO: 1 7 5
Oscilloscope
IF OUT
VBT- 1
OK
on
23. VBT
adjustment
with VET- 1
Minimum
7 - -
is not
TP4
EXT.
SP
AF
-- -
If adequate
DVM
MODE CW.N
IF SHIFT Centered
VBT Fully
clockwise
Disconnect connector
0
obtained, repeat the adjustment
several times.
T I
T2
effect
23' VBT
adjustment
with SSG,
AG and
Oscilloscope
Connect the SSG output
(14.175 MHz, 6 0 d B ) t o t h e
ANT terminal.
SSG output: 2 0 dB
Adjust as described above.
AGC FAST
the IF unit. Connect
the VET-1 output to IF
OUT 1, and connect
the oscilloscope to IF OUT 2.
Connect a 0.047pF capacitor
across D l 4 and D
15
on the
NG
IF unit. Set the filter D 15
switching terminal connection
D 1 4
to CW3. Adjust the control
on the VET-1 until the wave-
form shown at right is
observed on the oscilloscope.
Speaker
Set the MODE switch to
CW.W.
Disconnect the SSG output
from the ANT terminal, and
connect the noise generator
output in it's place. Set
the noise generator output
level to S5
-
7
NB ON
Reduce the noise generator
output level to below the
threshold of sensitivity
TC2 Adjust until the
waveform shown in
the preceding item
is obtained.
Remove 0.047 pF capacitor
Reconnect connector
ti'
BAND: 1.5
MODE. CW.N
IF SHIFT Centered
I
VBT Fully
clockwise
Disconnect connector @ on
the IF unit. Connect a
0 047 pF capacitor across
D14and D 1 5 o n t h e IFunit.
Filter SW terminal: CW3
Receive SSG signal ( 1.9 M Hz,
6 0 dB), and set the main tuning
to obtain waveform shown
at right.
MODE: CW.W
Filter SW terminal. CW1
f
=
1.2 kHz
Level: Level for max. A M
modulation.