TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TFM-550 Installation & Operating Instructions
TiL 99RE262 Rev A Issue 9
2-8
2.13 CROSS BAND REPEAT
The TFM-550 can act as a cross band repeater between VHF (high band only) and UHF. To
enter repeat mode, press FUNC and then 9. The status line will show REPEAT instead of the
band switch selection. When a signal is received on one of the bands, the audio is routed to
the transmitter of the other band. This process can only go in one direction at a time. While
transmitting, short bursts of noise due to intermittent signal strength or interference will be
muted while the transmitter continues to transmit. There is also a short delay of silence (tail)
after the received signal ends. The operator at the TFM-550 can monitor communications in
both directions but can only talk to one band at a time via the band select switch. If the
radio is set up in dual mode, the band selection is made at the audio panel. To cancel cross
band repeat mode, press ENTER.
2.14 PC MEMORY PROGRAMMING UP/DOWNLOAD CAPABILITY
The TFM-550 transceiver can be programmed by a Windows based personal computer using
Technisonic software supplied on CD with each TFM-550.
Requirements:
1.
PC compatible computer with a CD ROM drive, running Windows 95/98/NT/2000/ME.
2.
Bench power supply of 28 volts DC.
3.
A PC download cable, P/N 993390-1 which can be supplied or made from the wiring
diagram at the back of this section.
Connections:
1.
With the PC turned off, plug the 25 pin male 'D' connector into a serial port.
2.
Plug the 9 pin 'D' connector into the back of the TFM-550 transceiver.
3.
Connect the power supply to the TFM-550.
Installing the MultiTDP Program:
The CD supplied with each radio contains software for all of Technisonic’s downloadable
transceivers. Place the CD into your drive and use Windows Explorer to open the MultiTDP
directory on the CD. Double-click the MultiTDP_Install.exe file. Follow the onscreen
instructions to install the program onto your hard drive. When the program is installed, it can
be run by selecting Programs from your Start menu, then select Technisonic from the
submenu and finally MultiTDP.
Using the MultiTDP Program:
With the program running on your computer, a full MultiTDP instruction manual can be
loaded by selecting Documentation in PDF format under the Help menu. Otherwise, to get
started, pull down the File menu and select TFM-550. The program defaults to serial port
com1 but can be set to com 2, 3 or 4 under the Com Port menu. The program is now ready
to use. You may want to upload data from the radio and edit channels or start a new data
file. The VHF and UHF bands are treated as separate radios and must be up or downloaded
and edited separately. Editing is done on a channel by channel basis. Set the channel
number you would like to edit and then modify the frequencies, labels, CTCSS tones, DPL
codes, wide / narrow band setting and scan lists as desired. Press the Save Record button
to store the changes you’ve made to the data base below. After you have edited the
channel list your can save your changes to disk and/or download to the radio. Only channels
selected with a check mark will download. It is recommended to use the Select All
command in the Data Transfer menu to ensure the data base in the radio matches the one in
the PC. When download is selected, a message box will appear on your screen asking you
to press FUNC and DN on the radio. Press these buttons on the radio before you click OK in
the message box, otherwise the download will fail.
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