Page 81
FT
DX
5000 O
PERATING
M
ANUAL
VOX
(
A
UTOMATIC
TX/RX S
WITCHING
USING
V
OICE
C
ONTROL
: SSB/AM/FM M
ODES
)
Instead of using the microphone’s
PTT
switch or the front panel [
MOX
] switch to activate the transmitter, the VOX (Voice
Operated TX/RX Control) system provides hands-free, automatic activation of the transmitter, based on voice input into
the microphone. Setup of the VOX system takes only a few seconds.
1. Adjust the [
MIC
] (gain) knob for SSB use, as described
on page 70.
2. Set the [
VOX
] and [
DELAY
] knobs fully counter-clock-
wise (to the left).
3. Press the [
VOX
] button briefly, to engage VOX opera-
tion. The [
VOX
] button will glow red.
4. Speak into the microphone in a normal voice level,
and rotate the [
VOX
] knob clockwise (to the right) until
the point where your voice input activates the trans-
mitter.
A
DVICE
:
Do not advance the setting of the [
VOX
] knob too far,
as this will make the transmitter respond to minor back-
ground noises in your station.
5. Now stop speaking, and note the amount of time it takes
for the receiver to recover. If the hang time is too long
or too short; rotate the [
DELAY
] knob, while speaking
briefly into the microphone, and then pausing, to set
the desired hang time. Clockwise rotation of the [
DE-
LAY
] knob will increase the hang time.
A
DVICE
:
The hang time of the VOX circuit will show for 3 sec-
onds in the lower right corner of the Main Display
whenever the outer [
DELAY
] knob is turned.
Alternately, the 3-second display feature may be
changed to show in the
SUB DISPLAY-
III
window
via Menu item “
018 DISP INDI
”. Additionally, you
may disable the 3-second display feature via Menu item
“
017 DISP LVL IND
” See page 122 for details.
MONITOR
(
SSB/AM/FM M
ODES
)
You may listen to the quality of your transmitted signal using the Monitor feature.
1. Press the [
MONI
] button. The “
” icon will ap-
pear in the display, indicating that the Monitor is turned
on.
2. During transmission, rotate the [
MONI
] knob to ad-
just the audio level from the Monitor. Clockwise rota-
tion of this knob will increase the volume level.
3. To switch the Monitor off again, press the [
MONI
]
button briefly once more. The “
” icon will turn
off, confirming that the Monitor is now disengaged.
T
RANSMITTER
C
ONVENIENCE
F
EATURES
6. To exit from VOX operation, press the [
VOX
] button
once more. We recommend doing this if you are going
to leave your station, to prevent inadvertent activation
of the VOX system by a ringing nearby telephone,
speaker audio from a TV, etc.
A
DVICE
:
The Anti-Trip setting sets the negative feedback of re-
ceiver audio to the microphone, to prevent receiver
audio from activating the transmitter (via the micro-
phone) can be adjusts via Menu item “
175 TGEN
ANTI VOX
”.
VOX operation may be engaged on voice modes (SSB/
AM/FM) and on AFSK-based data modes. Use Menu
item “
174 TGEN VOX SEL
” (the selections are
“MIC” and “DATA”).
A
DVICE
:
If you are using the speaker for monitoring, instead of headphones, excessive advancement of the [
MONI
] knob can
cause feedback to occur. Additionally, this feedback can cause the VOX system to hang up in a loop, making it impos-
sible to return to receive. Therefore, we recommend the use of headphones, if at all possible, or the minimum usable
setting of the [
MONI
] knob, if the speaker must be used.
Because the monitor feature utilizes a sampling of the transmitter’s IF signal, it can be very useful for checking the
adjustment of the Speech Processor or Parametric Equalizer on SSB, and for checking the general signal quality on AM
and FM.
[VOX] Button
[VOX] Knob
[DELAY] Knob
[MIC] Knob
[MONI] Button
[MONI] Knob
