Led Indicators - Yaesu FT-991A Operating Manual

About the Display
Displays the transmit/receive status of the transceiver, and the main dial "FAST" and "LOCK".
RX Indicator
TX Indicator
RX Indicator ( Green )
This indicator illuminates when the squelch opens.
TX Indicator ( Red )
This indicator illuminates during transmission.
Memory Mode RX/TX Indicators
Green ( Left ) :
This indicator illuminates when the receiver is active on
the memory channel.
Red ( Right ) :
This indicator illuminates when the transmitter is active
on the memory channel.
Main Band RX/TX Indicators
Green ( Left ) :
This indicator illuminates when the receiver is active on
the main band ( VFO-A ) .
Red ( Right ) :
This indicator illuminates when the transmitter is active
on the main band ( VFO-A ) .
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LED Indicators

Memory Mode Main Band
RX/TX RX/TX
Indicators Indicators
LOCK Indicators
FAST Indicators
Sub Band
TX
Indicator
Sub Band TX Indicator
Red ( Right ) :
This indicator illuminates when the transmitter is active
on the main band ( VFO-B ) .
FAST Indicators
This indicator appears when the Main Tuning Dial knob
tuning rate is set to "fast" ( see page 23 ) .
LOCK Indicators
This indicator appears when the Main Tuning Dial knob
is locked ( see page 23 ) .
F T-991 Operating Manual