Noiseblanker - Kenwood TS-450S Instruction Manual

[HI] NOTCH control (Except FM mode)
NOTCH control
NOTCH key
PA by NOTCH control
Audio output Audio output
(NOTCH OFF) (NOTCH ON)
NOTCH control
4-11-10. Noise Blanker
The NOTCH function is used to reduce or eliminate
heterodyne, or CW type signals. The NOTCH filter
will not be effective against SSB, AM or FM type
signals. To use the control, place the NOTCH key ON
and slowly rotate the NOTCH control to reduce the
interference.
Notes
1. The NOTCH frequency can be varied within a
range of approximately 400 to 2600Hz.
2. When an interfering signal such as a CW station
appears, slowly rotate the NOTCH control. If you
rotate the knob too quickly you may pass right
over the notch point. Slow rotation will yield best
results.
Each time the NB1/2 key is pressed, it changes the noise blanker from NB! to NB2 to OFF and back to NBI.
NB1/2 key
NB1
For pulse type noise, such as the generated by
automotive ignition systems, select NB 1.
NB 1 will not help to eliminate atmospheric or line
noises, only pulse type noise.
NB2
NB 2 is used for long duration pulse noise, like the
"woodpecker".
To reduce "woodpecker" radar noise interference,
select NB 2 ON (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 differ-
ent types of interference; but the two noise blankers
that have been provided in the TS-450S/6908 are ef-
fective in most cases.
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