Kenwood TS-850S - Manual (Page 40)

>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.
NOTCH operation (LSB mode)
4-10-10. 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
Controls the noise blanker operating level.
Use only the minimum level necessary.
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.
1. Check that the ALC reading on voice peaks is still
within the ALC zone on the meter. If necessary,
readjust the MIC gain control for the proper ALC
reading.
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. If the VOX circuit transfers between words, or
holds too long, adjust the release time-constant
using the DELAY control.
4-10-12. ON AIR MONITOR
I . MONI switch
Turn the MONI switch ON to monitor the
transmitted
signal. Headphones are
recommended.
II. MONI control
Adjust monitor volume level.
Note
This function is not active in the AM and FM mode.
4-10-13. RIT control
The RIT control allows shifting the receiver
frequency ±1.2 kHz. Use of the RIT control will not
affect the transmit frequency.
The RIT step size is either 10 Hz or 20 Hz. (Please
refer to Section 4-10-15.)
When the RIT switch is ON, the RIT indicator will
light, and the receive frequency can be adjusted by
using the RIT/XIT control.
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