TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TAF-550 Installation & Operating Instructions
TiL 96RE187 Rev D
3-19
3.5.4
PRIORITY AND SELECTIVE MEMORY CHANNEL SCANNING
The priority memory channel is always memory position number 1. The priority memory channel
is scanned every other step (i.e. 121314151) to ensure that no incoming messages are missed.
The priority channel can be locked out, which will result in the normal scanning of the other
memory positions.
Selective memory scanning allows the user to select which of the 120 memory channels are to be
scanned or locked out when the scan function is invoked. To use this feature, follow the
PROGRAMMING INSTRUCTIONS found in paragraph 2.3. Once the screen displays SCAN or
LOCKOUT, use the M.UP or M.DN keys to toggle to the desired condition and press ENTER. In
normal operating mode the display (of the TFM-138B) will later show a "+" beside the memory
channel number if scan is enabled.
3.5.5
DIRECT FREQUENCY ENTRY MODE
This mode is designed to facilitate quick frequency selection during emergency and other
operational conditions requiring direct operating frequency selection. This operating mode is
disabled along with the programming mode when the internal disable jumper is set.
1.
When the transceiver is in the normal operating mode, press FUNC and the desired
operating frequency i.e. 153.275.
Please note in the above operation, after FUNC and "1" are entered, the LED display will show
memory channel "000" and then the remaining digits in the desired frequency are shown as they
are entered. No alphanumeric message can be entered in this mode. Operation on the new
frequency occurs in both transmit and receive (simplex only) modes. If RX or TX CTCSS
tones/DPL codes are required they must be programmed on.
3.5.6
RECEIVE FREQUENCY SIMPLEX FUNCTION
The receive frequency simplex function allows you to quickly change the transmit frequency,
when operating on a split pair (repeater/semi-duplex mode), to the receive frequency to allow
direct communications. i.e. If you are transmitting on 152.000 MHz and receiving 152.555 MHz,
press FUNC then UP to transmit on 152.555 MHz. To return to the split pair condition, you must
recall the memory channel again. This is quickly done by pressing M.UP for one step up, then
back down one step with the M.DN key.
3.5.7
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".
