Yaesu FT-950, Руководство по эксплуатации, Страница: 19 / 132

Page 17 FT-950 O
PERATING
M
ANUAL
[
MOX
] Switch
Pressing this button engages the PTT (Push to Talk)
circuit, to activate the transmitter (the LED inside this
button will glow red). It must be turned off (the red
LED will be off) for reception. This button replicates
the action of the Push to Talk (PTT) switch on the mi-
crophone. When engaging the [
MOX
] button, or oth-
erwise causing a transmission to be started, be certain
you have either an antenna or 50-Ohm dummy load
connected to the selected Antenna jack.
[
VOX
] Switch
This button enables automatic voice-actuated transmit-
ter switching in the SSB, AM, and FM modes. While
activated, the LED inside this button glows red. The
controls affecting VOX operation are the Menu items
“
114 TGEN V GAIN 114 TGEN V GAIN 114 TGEN V GAIN 114 TGEN V GAIN 114 TGEN V GAIN
”, “
115 TGEN VOX DLY 115 TGEN VOX DLY 115 TGEN VOX DLY 115 TGEN VOX DLY 115 TGEN VOX DLY
”, and
“
116 TGEN ANTI VOX 116 TGEN ANTI VOX
116 TGEN ANTI VOX 116 TGEN ANTI VOX 116 TGEN ANTI VOX
”. By proper adjustment of these
controls, hands-free voice-actuated operation is pos-
sible.
[
MONI
] (Monitor) Switch
This button enables the transmit monitor in SSB, CW,
AM, and FM modes. While activated, the “
” icon
appears in the display. The Monitor audio level may
be adjusted by turning the [
MONI
] knob.
A
DVICE
:
When using headphones, the Monitor function is very
helpful while adjusting the Parametric Equalizer or
other voice quality adjustments. The voice heard in the
headphones represents the transmitted audio qualities.
[
PROC
] (Processor) Switch
This button enables the Parametric Microphone Equal-
izer and Speech Processor for SSB/AM transmission.
When the Parametric Microphone Equalizer is acti-
vated, the “
” icon appears in the display. When
the Speech Processor is activated, the “ ” and
“ ” icons appear in the display. Adjustment of
the Processor level is accomplished via the Menu item
“
109 TGEN PROCLVL 109 TGEN PROCLVL 109 TGEN PROCLVL 109 TGEN PROCLVL 109 TGEN PROCLVL
”.
A
DVICE
:
ˆ The Speech Processor is a tool for increasing the
average power output through a compression tech-
nique. However, if the Processor level is advanced
too far, the increase in compression becomes
counter-productive, as intelligibility will suffer. We
recommend that you monitor the sound of your sig-
nal using the Monitor (with headphones).
ˆ When the optional Data Management Unit ( DMU-
2000 ) is connected, you may use the Audio Scope/
Oscilloscope page to help you adjust the setting of
the compression level of the Speech Processor for
optimum performance using your voice and micro-
phone.
[
SPOT
] Switch
This button turns on the CW receiver spotting tone; by
matching the SPOT tone to that of the incoming CW
signal (precisely the same pitch), you will be “zero
beating” your transmitted signal on to the frequency of
the other station.
The offset tone frequency will be indicated in the fre-
quency display area of the display while this button is
pressed.
[
BK-IN
] Switch
This button turns the CW break-in capability on and
off. While CW break-in is activated, the “
” icon
appears in the display.
[
KEYER
] Switch
This button toggles the internal CW keyer on and off.
While activated, the “
” icon appears in the dis-
play. The Keyer sending speed is adjusted via the front
panel’s [
SPEED
] knob and the CW Hang Time is ad-
justed via the Menu item “
044 A1A DELAY 044 A1A DELAY
044 A1A DELAY 044 A1A DELAY 044 A1A DELAY
”.
[
AGC
] Switch
This button selects the AGC characteristics for the re-
ceiver. Available selections are FAST, MID, SLOW,
or AUTO. The “AGC” icon will change according to
the AGC characteristics selected.
Press the [
AGC
] button repeatedly to select the de-
sired receiver-recovery time constant. Press and hold
in the [
AGC
] button for two seconds to disable the
AGC (for testing or weak-signal reception).
A
DVICE
:
ˆ The Attenuator may be used in conjunction with
the [
IPO
] button to provide two stages of signal
reduction when an extremely strong signal is being
received.
ˆ
If the AGC receiver-recovery time is set to “Off”
by pressing and holding in the [ AGC
] button, the
S-meter will no longer deflect. Additionally, you
will likely encounter distortion on stronger signals,
as the IF amplifiers and the following stages are
probably being overloaded.
F
RONT
P
ANEL
C
ONTROLS
& S
WITCHES