Kenwood TS-850S Instruction Manual page 40

4-10-10.
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Unwanted signal
Desired signal
Desired signal
Unwanted signal nulled by NOTCH
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fcr
Ree b
NOTCH -O— sac
4 6
2 8
0 10
Notch off Notch on
NOTCH operation (LSB mode)
Noise Blanker
NB 1 switch
For pulse type noise, such as generated by
automotive ignition systems, turn the NB 1 switch
ON.
When pulsating noise, such as that caused by
automobile ignitions is encountered, place the NB
1 switch ON.
This switch will not help to eliminate atmospheric
or line noises, only pulse type noise.
@NB 2 switch
Noise blanker 2 is used for long duration pulse
noise, like the "woodpecker". To reduce
"woodpecker" radar noise interference, set switch
NB 2 to the ON position (NB 2's effectiveness
depends on the specific type of interference). If
you use NB 2 for short duration pulse noise, the
receive tone may become distorted, making it
difficult to hear.
Unfortunately no noise blanker can remove all
different types of interference; but the two noise
blankers that have been provided in the TS-850
are effective in most cases.
If there is no "woodpecker" present, the switch
should be in the OFF position.
@NB LEVEL control
34
Controls the noise blanker operating level.
Use only the minimum level necessary.
@NB2 WIDTH control
Controls the width of the blanking pulse when NB
2 operates. Adjust the width so that the desired
signal can be received most clearly.
Notes
1. The control only works when there is
woodpecker noise.
2. If this control is turned too far, the received
signal may be interrupted. Set the control to
the best position.
4-10-11. | VOX OPERATION
Depress the VOX switch. While speaking into the
microphone, increase the GAIN control until the VOX
relay just operates. Clockwise rotation of this control
will increase the sensitivity. For VOX operation it is
sometimes desirable to "Close-Talk" the microphone
in order to prevent background noises from tripping
the transmitter.
2. If the VOX circuit is activated by the output from
the speaker, adjust the ANTI control as necessary
for proper VOX operation.
3. Do not use excessive VOX or ANTI VOX settings.
This may cause the VOX circuit to operate
erratically. Use only the minimum necessary
control setting.
4-10-12. ONAIRMONITOR
|. MONI switch
Turn the MONI switch ON to monitor the
transmitted signal. Headphones are
recommended.
Il. MONI control
Adjust monitor volume level.
Note
4-10-13. RIT control
When the RIT switch is ON, the RIT indicator will
light, and the receive frequency can be adjusted by
using the RIT/XIT control.