Toa WA-641C Specifications

WIRELESS MICROPHONE SYSTEMS
DESCRIPTION
TOA's Password Series is a VHF high-band wireless
microphone system operable between 168mHz and 216mHz.
The Password systems are uniquely suited for professional
audio applications ranging from gymnasiums and houses of
worship to classrooms, boardrooms, auditoriums, and live
theater.
All four systems in the Password Series are equipped with
TOA's proprietary double-squelch circuitry, consisting of a
noise squelch and a tone-key circuit. The noise squelch
automatically mutes signals at approximately 14dB
prevent unwanted RF noise from being transmitted. The tone-
key circuit is a high-frequency 32.768kHz side-band signal
that is broadcast by the transmitter simultaneously with the
audio signal. The receiver is designed to reject any RF Signal
which does not have the tone-key present, especially when
the transmitter is off. As a result, the receiver will not process
any other audio signal which is nearby in frequency or location
if the tone key is not present.
TOA's Password Series also features a compander circuit
which compresses the audio signal within the transmitter at a
ratio of 2 : 1. The signal is then expanded at the same ratio by
the receiver. This boosts the dynamic range to better than
90dB. The original audio signal is unaltered throughout the
entire compression/expansion process.
Four microphones are available with TOA's Password Series.
Each mic transmitter will operate continuously on a single AA
battery for more than 12 hours. For enhanced speech
applications, TOA offers the WM-270 hand-held electret
condenser microphone. The WM-280 is a hand-held dynamic
microphone for vocal use. The WM-290, which includes a
Shure SM-58 head, is also a hand-held dynamic microphone.
The WM-370 is a unidirectional lapel condenser microphone
with a body pack transmitter.
PASSWORD™ SERIES MICROPHONES
WM-270
Electret
Condenser
Microphone
WM-280
Dynamic
Microphone
WM-290
Dynamic
Mlcrophone
There are four systems that comprise TOA's Password Series.
The 870 true diversity and 770 non-diversity wireless systems
each consist of two-port modular receiver frames, which
accept frequency-specific tuner modules. Occupying only a
half-rack space, two receivers can be mounted side-by-side,
yielding four frequencies in a single rack space. The modular
design of both systems allow you to add or change
frequencies in minutes.
TOA PASSWORD
( 5 V) to
Lapel Microphone
SERIES
™
TOA's 780 Scout is a single-channel, non-diversity wireless
microphone system designed to deliver professional
performance at an attractive price. Packaged in a compact
case for placement flexibility, the Scout utilizes all the
performance functions of TOA's 770 non-diversity system.
The Scout includes a built-in telescoping antenna and an
externally mounted AC power supply.
PASSWORD SERIES RECEIVERS
™
WT-870
Dual-channel Diversity Receiver Frame
W T - 7 7 0
Dual-channel Receiver Frame
WTU-870
True Diversity
Tuner Module
The 600 series portable
meeting amplifiers
incorporate the Password
System non-diversity wireless
microphone into a compact,
ruggedly portable PA system.
The two models,
WA-641 and WA-641C (with
integrated cassette player),
feature a 20-watt, two-way
speaker/amplifier system, a
wired low-impedance
microphone input, an auxiliary
input, and two non-diversity
microphone receiver tuner module slots, along with a built-in
telescoping antenna.
F/or added versatility, the Password Series includes an
antenna distributor, model WD-770, which splits the input from
a single antenna or a pair of antennas into eight separate
frequencies. Ideal for use in non-diversity or diversity
applications, the WD-770 eliminates the need to provide
additional antennas when more than two frequencies are used
within a wireless system.
With a single WD-770, one
antenna can be utilized to
manage up to eight non-
diversity signals, while a pair
of antennas working with two
WD-770 units can supply
input for up to eight separate
diversity frequencies.
WT-780
Single-Channel
Receiver
WTU-770
Non-diversity
Tuner Module
600 SERIES PORTABLE
MEETING AMPLIFIERS
WA-641C
( 1 5 W )
with
cassette
ANTENNA DISTRIBUTOR
WD-770