Interference And Noise Elimination; If Shift; If Filter; Noise Blanker - Kenwood TS-50S Instruction Manual

6 OTHER USEFUL FEATURES
INTERFERENCE AND NOISE
ELIMINATION
IF SHIFT
IF Shift functions only in the SSB or CW modes.
This allows you to shift the IF filter pass band without
changing the receive frequency.
When the IF pass band is shifted, as shown in the
diagram, it is possible to reduce or completely
eliminate adjacent frequency interference.
Turning IF SHIFT
counterclockwise+-
Desired
signal
I
IF pass band
I
Turning IF SHIFT
... clockwise
Desired signal
-.Jl \ "
--------
.
~\
Interfering signal
Adjust the IF SHIFT control clockwise to eliminate an
interfering signal lower than your receive frequency.
This attenuates interference lower in frequency.
Adjust the IF SHIFT control counterclockwise to
eliminate an interfering signal higher than your receive
frequency. This attenuates interference higher in
frequency.
IF FILTER
In the SSB, CW, or AM mode, you can use the
narrOw filter by changing the menu setting. Refer to
Menu Set-up (Menu A, No. 03) on page 46.
For SSB and CW, you can change from the 2.4 kHz
standard filter to the 0.5 kHz (optional) filter. You must
first install the optional 0.5 kHz filter.
For AM, you can change from the standard 6 kHz AM
filter to the built-in 2.4 kHz filter.
Note:
1 The·N indicator appears when the 0.5 kHz filter is selected
for
sse
or CW, or when the
2.4
kHz filter is selected for AM.
2 There is no filter
selectIOn
for FM.
NOISE BLANKER
Switch the NB button on if there is interference from
pulse noise, such as that caused by automobile
ignitions. The NB indicator shows the noise blanker is
on.
The noise blanker suppresses pulse noise and makes
receiving easier.
43
Switch the noise blanker off by pressing the NB button
again.
Note:
When
receiving a
strong signal with the N8
on, receiver
audio may be distorted. The Blanker is being" pumped" by the
strong signal. To eliminate this distortIOn, switch off the NB.
AUDIO AND SOUND FEATURES
"BEEP" TONE
The transceiver "beeps" to confirm that a button is
pressed. The volume of the beep is adjustable with a
variable resistor inside the transceiver. Refer to
"Adjustments" on page 54. If desired, it is possible to
turn off the function. Refer to Menu Set-up (Menu B,
No. 50) on page 47.
MODE CONFIRMATION TONE OUTPUT
(MORSE CODE
or
BEEP)
Pressing a modulation mode button causes the first
character of the mode to sound in Morse code. This
can be changed so that a beep will sound instead.
Refer to Menu Set-up (Menu B, No. 51) on page 47.
- -
R_o_d_e _ _
-i--_ _ _
M_o_rse Code OutPu_t _ _ _
, LSB
(-N)
I. - .
(L)
8:' - "'
I • - - - -
~:;:
I = :
---.-:~~)
P '~ AM~(-N)
• _ (A)---l
FM • - •
(F)
- - - - -
(U)