TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TFM-550 Installation & Operating Instructions
TiL 99RE262 Rev A Issue 9
2-6
2.8 KEYBOARD LOCKOUT FUNCTION
The keyboard can be locked out so that accidental pressing of keys does not change
frequency, etc., unknowingly to the operator. To lock the keyboard, press
FUNC
then
LOCK
.
This will disable all keyboard functions (except keyboard unlock) in the receive mode. The
DTMF function during transmit will not be affected. To unlock the keyboard, press and hold
the
LOCK
key for two seconds until the display indicates "UNLOCK".
2.9 VARIABLE FREQUENCY MODE FUNCTION
To enter variable frequency mode, press
RCL, 0,0,0
, then
ENTER
or enter a frequency in the
direct entry mode described above. The memory channel that you were just in will still be
valid, but now you can manually adjust the frequency with the
M.UP, M.DN, UP
and
DN
keys. The
UP
and
DN
keys will make the frequency count up or down in steps of 2.5 kHz.
The
M.UP
and
M.DN
keys will make the frequency count up or down in steps of 1 MHz.
You can not change the label. The frequency in this mode cannot be stored in memory. To
exit this mode, recall one of the 200 memory channels. (Example:
RCL, 0,0,1
). Variable
frequency mode is disabled when the internal entry disable jumper is removed.
2.10 LED DISPLAY VARIABLE DIMMING MODE
1. With the transceiver in normal operating mode press the
UP
or
DN
keys to increase or
decrease the intensity of the LED display.
2. Once maximum intensity of the display is achieved, the UP key no longer functions.
Conversely, once minimum intensity is reached, the
DN
key ceases to function.
2.11 90 SECOND TRANSMITTER TIME OUT FEATURE
A selectable 90 second transmitter time out feature is provided to prevent accidental
continuous transmission in the event of a faulty PTT switch. With this feature enabled the
transceiver will stop transmitting after the PTT is engaged continuously for 90 seconds. The
timer is reset by releasing then re-engaging the PTT switch.
Press the
FUNC
then the
M.UP
key. Use the
M.UP
and
M.DN
keys to select 90 SEC, which
enables the feature, or NONE which disables it.
2.12 PROGRAMMING CTCSS TONES/DPL CODES
CTCSS tones (PL tones) or Digital DPL codes can be assigned to each memory channel on
any of the three operating bands. To program a tone/code to a memory channel:
1.
Select the desired band on the band select switch.
2.
Use the
M.UP
and
M.DN
keys to select the memory channel that you want to assign a
CTCSS tone or DPL code.
3.
Press the
FUNC
key then the
TONE
key. The display will show "RX TONE:" and the
current tone number, as well as the tone frequency in Hz.
4.
Use the
M.UP
and
M.DN
keys to select the tone number you require. See
Table 2.1
for
a list of the available CTCSS tones.
5.
Press
ENTER
. "TX TONE" appears on the display. Repeat step 3.
6.
The display will now show "RX DPL:" and the current 3 digit DPL code. If no DPL code
is required "000" should be entered. Please note that if a DPL code is to be programmed
a CTCSS tone should not be enabled.
7.
Use the keypad to enter the required octal 3 digit DPL (Digital Coded Squelch or DCS)
code. See
Table 2.2
for a list of all usable and unique octal 3 digit DPL/DCS codes.
8.
Press
ENTER
. "TX DPL" appears on the display. Repeat step 6.
Summary of Contents for TFM-550
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