TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TAF-550 Installation & Operating Instructions
TiL 96RE187 Rev D
1-1
SECTION 1 - GENERAL DESCRIPTION
1.1 INTRODUCTION
The Model TAF-550 Modular Communications System No. 960200, manufactured by Technisonic
Industries Limited, consisting of a VHF/FM and a VHF/AM Transceiver complete with an AC and
DC power supply, microphone and power cables. The TFM-138B is a frequency agile fully
synthesized FM transceiver offering an extended operating frequency range of 138-174 MHz with
selectable wide/narrow band channel spacing. The Model 91-DE is a microprocessor controlled,
simplex AM transceiver operating over the frequency range of 117.975 MHz to 138.000 MHz. The
Modular Communications system is intended for temporary, emergency or backup operation in a
fixed environment. The system can operate from external AC power, external 12 Volt DC power,
or external 24 Volt DC power.
1.2 DESCRIPTION
The TAF-550 Modular Communications System consists of FM Transceiver TFM-138B P/N
921012-1 Option B, AM Transceiver Model TiL 91-DE P/N 901006-2, Modular Case P/N 953209-
1, Microphone P/N 861902-1, AC Power Cord P/N 927002-1, DC cable Assembly P/N 963213-1
(12 Volt) and Optional DC Cable P/N 93212-1 (24 Volt). The rear panel access cover houses the
microphone, AC power cord, DC power cable assemblies and 2.5 Amp SLO blow fuse (AC), 5
Amp fuse (12 Volt DC) and 3 Amp fuse (24 Volt DC). Refer to Figure 1.1 for details.
1.2.1
FM Transceiver Model TFM-138B, P/N 921012-1, Opt. B
The TFM-138B, Transceiver is a frequency agile, fully synthesized airborne transceiver capable
of operating in the 138.000 MHz to 174.000 MHz frequency range in 2.5 kHz increments with
either 25 kHz or 12.5 kHz channel spacing. The Transceiver can operate without restriction on
any split frequency pair in the band and also incorporates a two channel synthesized guard
receiver.
The TFM-138B Transceiver provides 120 operator accessible memory positions, each of which is
capable of storing a transmit frequency, receive frequency, transmit frequency CTCSS tone or
DPL code, receive frequency CTCSS tone or DPL code, an alphanumeric identifier for each
channel and for wideband (25 kHz) or narrowband (12.5 kHz) channel spacing assignment.
Operating frequency and other related data are presented on a 48 character, two line LED matrix
display. Data entry and function control are performed via a 12 button keypad. Preset channels
may also be scrolled and scanned through keypad function activation. Data may also be entered
via an MS-DOS based computer with the provided software and optional PC download cable, P/N
943165-1. A DB-15 connector is provided on the rear panel of the TAF-550 chassis to facilitate
the PC download function of the TFM-138B without the need to remove it from the TAF-550
chassis.
