TOA RADIO TUNER
SYNTHESIZED AM/FM TUNER
DT-920
DESCRIPTION
TOA DT-920 is a mono, frequency synthesized, AM/FM
tuner for use in a variety of commercial background and
foreground music systems. Attractively styled, it provides a
number of useful functions, is easy to operate and has low
noise, excellent sensitivity and stability. It has a large digital
display to indicate the selected station, memory preset,
tuning mode and the frequency band selected.
The frequency ranges and frequency steps for both the AM
and FM bands can be changed using a simple power-up
procedure to accommodate differing world broadcast
standards. These can be changed independently for each
band.
Featuring 40 memory presets for stations (CH 1—CH 40),
the DT-920 provides several useful ways to scan for and
select stations using either station frequencies or the
memory preset numbers for the scanning. A scan level
switch selects between local or distant reception
sensitivities and can be set independently for the AM and
FM bands. An automatic up or down station scan selects
the next used frequency or preset. Stations can also be
selected manually with the up/down tuning bar. Both these
tuning methods can be set independently for the AM and
FM bands. Alternately, a station can be selected by directly
entering its frequency or memory preset number into the
display. Selected stations can be stored in any
combination to the 40 memory presets that are retained in a
non-volatile memory when power is turned off.
A fourth, unique method for selecting stations, particularly
useful on job-sites where the local station frequencies are
unknown, is Automatic Preset Tuning (APT).
Functioning in either the local or distant mode, the tuner will
start at the low end of the selected frequency range and
scan upward. The first 20 stations received will be
automatically entered in order into 20 of the memory
presets. This can be done for each band, AM and FM, to
automatically program all 40 presets.
The audio output features two RCA type jacks wired in
parallel and provides a -10dBV output (-8dB ref 0.775V)
capable of driving 10k ohm or higher loads. This provides
a proper match to line inputs on the TOA 900 Series mixers
and amplifiers. The DT-920 includes a 300 ohm FM dipole
antenna and an AM loop antenna, although an outdoor
antenna can be connected in weak or fringe reception
areas. The antennas connect via push-type terminals.
The optional MB-DT920 rack mount kit allows the tuner to
be mounted in a standard 19" E.I.A. equipment rack
occupying two rack spaces.
FEATURES
1. Presets for 40 AM and/or FM stations.
2. Frequency synthesized digital tuning with multi-function
digital display.
3. Automatic station scan (local or distant) and manual
tuning.
4. Automatic station storage to memory using auto-scan
mode.
5. Tuning by direct entry of the station frequency.
6. Includes an FM dipole and AM loop antenna.
7. Optional rack mount kit available.
