Kenwood R-5000 Car Satellite TV System User Manual


 
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RF gain control
This control adjusts the gain of the receiver high-
frequency amplifier section.
For normal receiver pe
rf
ormance, and maximum gain, this
control should be in the full clockwise position. If you are
having trouble copying the desired signal make a note of
the stations peak S-meter reading. Then, adjust the RF
control counterclockwise, so that the meter needle is sta-
tionary at this level. Now, all signals that were less than
the desired signal will be attenuated, such as static noise,
etc., making reception easier.
If the incoming signal pegs the S-meter you can also re-
duce the receiver gain by counterclockwise rotation of the
RF control. The S-meter pointer will always advance up-
scale as the RF control is rotated counterclockwise, as a
visual reminder that the gain of the radio has been re-
duced.
Simultaneous use of the RF gain control and AGC
switch
If a strong signal (such as a local station) appears in the vi-
cinity of the intended receive signal, the S-meter may
show unusual deflection due to the AGC voltage deve-
loped from the strong disturbing signal. If this occurs, turn
the RF gain control counterclockwise so the meter pointer
remains at about the original deflection peak and turn the
AGC switch to the FAST position. This will reduce the un-
wanted AGC voltage and permit clear reception.
12
AF gain control
Turn the knob to increase or decrease the volume.
Clockwise rotation increases the volume and counter-
clockwise rotation decreases the volume.
13
RF ATT (Attenuator) switch
When the incoming receive signal is very strong, the sig-
nal should be attenuated to prevent distortion of the sig-
nal, thereby stabilizing the receiver performance. This is
easily done by activating the RF ATT switch. This control
is also useful when a strong signal is near your desired sig-
nal; while some loss will occur to the desired signal, as
well as the undesired signal, the use of the attenuator will
sometimes allow you to understand what is being re-
ceived. This switch allows attenuation of the input signal
by 10, 20 or 30 dB. For normal receiver pe
rf
ormance, this
switch should be in the 0 dB position.
Note:
When using the VC-20 VHF converter you might occa-
sionally encounter carrier interference from
Television
or
FM broadcast stations. If you encounter any
unknown
in-
terference rotate the RF ATT switch to the 10 dB position.
This will help to reduce any cross modulation that might
occur due to the strength of these types of signals.
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AGC switch
This switch selects the operating time
constant of the
AGC (Automatic Gain Control) circuit.
When the AGC
switch is set to SLOW, the receiver gain and
S
-
meter read-
ings
will react slowly to large input changes,
and when set
to FAST, the receiver gain and S-meter will
react quickly
to
changes in the input signal level.
The normal position when using all modes
is the SLOW
position. When working any of the following
you might
wish to use the FAST position.
When tuning with the TUNING dial.
When receiving weak signals.
When a high-speed CW signal is being received.
Note:
This switch is disabled during FM operations.
© NOTCH switch
When the NOTCH switch is turned ON, the NOTCH control
functions as a NOTCH filter (except in the CW mode). In
the CW mode, the NOTCH control functions as an APF
(Audio Peak Filter).
®
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 interfer-
ence). 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 R-5000 are effective in most cases.
If there is no "woodpecker" present, the switch should be
in the OFF position.
Note:
NB2 is disabled during FM operations.
1]
NB 1 switch
For pulse type noise, such as generated by automotive ig-
nition systems, turn the NB 1 switch ON.
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