Furuno FAR-28x7 Series Operator's Manual page 28

1. RADAR OPERATION
The radar is initially set to previously used range and pulse length. Other
settings such as brilliance levels, VRMs, EBLs and menu option selections are
also set to previous settings.
The [STBY/TX] key (or TX STBY box) toggles the radar between STBY and
TRANSMIT status. The antenna stops in stand-by and rotates in transmit. The
magnetron ages with time resulting in a reduction of output power. Therefore, it
is highly recommended that the radar be set to stand-by when not used for an
extended period of time.
Quick start
Provided that the radar was once in use with the transmitter tube (magnetron)
still warm, you can turn the radar into TRANSMIT condition without three
minutes of warm-up. If the [POWER] switch has been turned off by mistake or
the like and you wish to restart the radar promptly, turn on the [POWER] switch
not later than 10 seconds after power-off.
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