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C
Operation
Transmitting
one, or by having another station give you
just long enough so that the transmitter re-
signal reports as you adjust it.
mains keyed between words, but drops back
0 If you adjust the
COMP
control, you should
to receive during pauses. Adjust the
DELAY
recheck your
MIC
control setting as described
control (third from the right), if necessary, for
in the step before last.
comfortable hang time.
VOX (Voice-Actuated T/R Switching)
1
In VOX operation, your voice causes trans-
1
mit/receive switching merely by speaking into
I
the microphone, without having to press the
P I T .
For the VOX circuit to operate properly,
three controls on the rear panel must be set to
match your microphone and the acoustic envi-
ronment of your station. Once set, these trim-
mers should not require readjustment unless
you change your microphone or station location.
0 First set the receiver for normal volume on a
clear channel, and preset the
VOX GAIN
con-
trol (nearest the power jack) on the rear panel
fully counterclockwise. Also preset the
ANTI-
TRIP
and
DELAY
controls (next to the
VOX
The
ANTI-TRIP
control probably needs no ad-
justment, but if you find that, with the micro-
phone in its normal operating position, receiver
audio from the loudspeaker trips the transmitter,
advance the
ANTI-TRIP
control more clockwise
(as viewed from the rear). On the other hand, if
VOX keying seems sluggish or unstable when
you speak into the microphone, try a more coun-
terclockwise setting.
Note: if VOX operation is unstable despite these
adjustments, RF feedback from the antenna or
feedline may be getting back into the transmitter.
Make sure your antenna is properly matched,
and that your antenna or feedline is not radiating
near the transceiver.
GAIN)
to mid-range.
0
Set the RF
PWR
control fully conterclockwise
CW Transmission
(to avoid creating interference while you set
There are several types of
CW
transmission
up the VOX controls).
available with the FT-890. All require, of course,
0 Now press the
VOX
switch near the upper left
that
You
have a CW
Or
paddies
corner of the front panel to activate VOX
(-).
the
KEY
jack on the rear panel (with a ~ - c ~ n t a c t
plug only - see the drawings below). There are no
Without pressing the
switch 'peak ' O n-
critical adjustments for the transmitter: you just
tinuously into the microphone while slowly
advancing the
VOX GAIN
control clockwise (as
the
RF PWR
to set your Output power.
viewed from the rear), just until your voice
YOU may also wish to set the sidetone volume, as
keys the transmitter.
described in the box on the next page.
0 Now speak intermittently into the micro-
0 Begin by pressing the
PO
meter selector but-
phone, and note the "hang time" between the
ton/LED. Of course you must have CW mode
moment you stop speaking and when the re-
selected, and for now, make sure the
BREAK-
ceiver is reactivated. This period should be
IN
slide switch on the top panel is in the
SEMI
CW
Key or Paddle Connections
page 19
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