Vox Delay; Emergency Freq Tx; Anti Vox Gain; Data Vox Gain - Yaesu FT-991 Operating Manual

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146 VOX DELAY

Function: Sets the VOX delay time.
Available Values: 30 - 3000 msec (10 msec/step)
Default Setting: 500 msec
Description: While operating VOX, the recovery time
(delay time) before returning to receive mode from
transmit mode may be set at 10 msec intervals. The
delay time may be adjusted while transmitting the
signal.

147 ANTI VOX GAIN

Function: Sets the VOX anti-trip.
Available Values: 0 - 100
Default Setting: 50
Description: The sensitivity of the anti-trip circuit may
be adjusted so that the VOX circuit does not acci-
dently engage due to the sounds from the transceiver
speaker. Increase the anti-trip value to the point that
sounds from the transceiver speaker do not engage
the transmitter while using VOX operation.

148 DATA VOX GAIN

Function: Sets the VOX GAIN while operating VOX
during the sending/receiving of data (PSK31, RTTY,
etc.).
Available Values: 0 - 100
Default Setting: 50
Description: Set the data input VOX gain to the point
that the data signal reliably engages the transmitter,
and also releases the transmit when there is no data
signal.

149 DATA VOX DELAY

Function: Sets the VOX DELAY time while operating
VOX during the sending/receiving of data (PSK31,
RTTY, etc.).
Available Values: 30msec - 3000msec
Default Setting: 100msec

150 ANTI DVOX GAIN

Function: Sets the data VOX ant-trip.
Available Values: 0 - 100
Default Setting: 0
Description: The sensitivity of the anti-trip circuit may
be adjusted so that the VOX circuit does not acci-
dently engage due to the received data while oper-
ating VOX. Increase the setting to a value that the
VOX circuit does not engage due to the received
data (the higher the value the greater the operation
sensitivity).
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151 EMERGENCY FREQ TX

Function: Enables TX/RX operation on the Alaska
Emergency Channel, 5167.5kHz.
Available Values: ENABLE/DISABLE
Default Setting: DISABLE
Description: When this Menu Item is set to ENABLE,
the spot frequency of 5167.5 kHz will be enabled.
The Alaska Emergency Channel will be fount be-
tween the PMS memory channel "P-9U" and the
memory channel "01".
Important: The use of this frequency is restricted to
stations operating in or near Alaska, and only for
emergency purposes (never for routine operations).
See §97.401(c) of the FCC regulations.
FT-991 O M
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