TECHNISONIC INDUSTRIES LIMITED
TDFM-9000 Installation Instructions
TiL 11RE442 Rev. D Issue 1
11
2.14
PTT 1, 2, 3, 5, 6, AND 4 – J1 PINS 5, 8, 11, 21, 24, AND J6 PIN 3
There are individual PTT lines for each band. These lines should be floating when in receive and
grounded for transmit. The input has a pull up resistor to 5 volts. Connecting an audio panel that
wishes to see more may result in no receive audio. Connect a 1N4006 diode in series with the
cathode towards the audio panel in this case.
2.15 PTT COMBINED 1 AND 2 – J6 PINS 4 AND 12
These are combined PTT inputs to all bands as selected from the front panel. The specifications
are the same as the individual inputs above.
2.16 TX DATA AND RX DATA – J1 PINS 12 AND 13
These pins provide RS-232 serial communications for use with the RC-9000 remote control head
if installed. Consult the RC-9000 installation manual for details.
2.17
UP AND DOWN – J1 PINS 16 AND 17
These pins can be used to scroll up and down through the bands or channels for the band
currently selected depending on the band input below. The inputs normally floating are grounded
to activate. Two push buttons or a center off, SPDT, spring-loaded toggle switch are typically
used on these inputs.
2.18
CHANNEL/BAND – J1 PIN 18
The Channel / Band input determines the function of the up down inputs above. If left
unconnected, the inputs are for channel selection. If grounded, the input is for band selection.
2.19
PANEL BACKLIGHTING – J1 PIN 25
Connect to aircraft panel dimming bus. The transceiver is capable of supporting 28 V
AC/DC
or 5
V
AC/DC
backlighting circuits. Select 28 volts or 5 volts via the configuration menu (see Section 2.17
of the TDFM-9000 Operating Instructions). No damage will occur if the wrong setting is made.
2.20
SPEAKER LO AND HI – J6 PINS 8 AND 9
Not normally connected in the aircraft. This output is 4 / 8 ohms at 1.1 watts max and has the
audio associated with Audio Combined 1. This output does not have to be terminated when not
used and should be left unconnected.