User's Manual

2-2
Figure 2-2 Front panel Controls – TDFM-636 Transceiver Only
2.3 POWER SWITCH
To switch the transceiver on, press and hold the left most knob until the radio powers up. The display will
show
TECHNISONIC and the software version installed followed by the model number as determined by which
RF modules are installed. The display will then show the normal display for band 1. To switch off the
transceiver at any time, press and hold the left most knob for 2 seconds until the display shows
OFF then
release. If it is desired that the radio comes on with the radio master in the aircraft, a power jumper may be
installed (see installation instructions) such that the radio is always on.
2.4 KNOBS
The transceiver will have two or three knobs depending on how many RF modules are installed. The knobs are
rotary encoders which turn endlessly which means their actual position is not important. Each knob also has a
push button incorporated in it so you can press the knob as well as turn it. Pressing a different knob will cause
the display and keyboard to switch to the band associated with that knob. The knob will start out as a volume
control. Pressing the same knob again will change its function to act as the channel/talkgroup selector
depending on how that band is programmed. Pressing the same knob again changes the function of the knob
to a display dimmer control. Pressing the knob again causes the key pad function to change from function keys
to number keys. The knob in this mode acts as a volume control. Another knob press will bring you the recall
mode (if this feature is enabled in the configuration menu). Typing in the channel number will bring you quickly
to that channel without scrolling through channels in between. Pressing the knob again brings it back to the
first mode of volume control. The current function of the knob is shown at the top right of the display.