Toa WA-641C User manual

TOA PASSWORD
™
SERIES
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 µ (5 µ V) to
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.
WT-780
Single-Channel
Receiver
WT-770 Dual-channel Receiver Frame
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.
WA-641C
(15W)
with
cassette
PASSWORD™ SERIES MICROPHONES
WM-270
Electret
Condenser
Microphone
WM-280
Dynamic
Microphone
WM-290
Dynamic
Mlcrophone
Lapel Microphone
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’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
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
WTU-770
Non-diversity
Tuner Module
600 SERIES PORTABLE
MEETING AMPLIFIERS
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 DISTRIBUTOR
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
WD-770
input for up to eight separate
diversity frequencies.

FEATURES QUIETING CURVE
1. Modular design enables easy change or addition of frequencies
(870 & 770 models).
2. Up to four separate frequencies available in one rack space
(870 & 770 models).
WT-77O+WTU-770 FCC Part 74
DE-EMPHASIS 50µ
S
3. 23 frequencies available, up to eight compatible channels in any
geographical area.
4. FCC & UL approved.
5. Features VHF high-band operation from 168mHz to 216mHz.
6. Double squelch system combines noise squelch to eliminate
ambient RF noise with tone-key circuitry to block out stray RF signals.
7. Compander circuit guarantees better than 90dB dynamic range.
8. Four different microphones available, including a Shure SM-58.
9. 12 or more hours of continuous mic operation on one AA battery
10. LED low power indicator on transmitter activated at least 30
minutes before power fails.
WT-770+WTU-770 FCC Part 74 A-Weight
DE-EMPHASIS 50µ
S
11. WD-770 optional antenna distributor can be used with the 870
and 770 models to split the input from a single antenna or pair of
antennas into eight separate frequencies.
12. Two year warranty.
Accessories
YW-620
Dipole Antenna WT-770=WTU-770 FCC Part 90
DE-EMPHASIS 50 µ S
YW-610
Mic Stand Mounting
Antenna
YW-600
Whip Antenna
YW-451
Antenna Cover
for Outdoor
Installation
of YW-620
J-700
Joining Metal Plates for All 1/2 Width
Wireless Equipment
(Side-by-Side Mounting)
( 1 pair )
MB-14
Rack Mounting Brackets
(1pair)
WP-860/760
Tuner Panel
BK-014B
Half Width
Blank Panel
WT-770 + WTU-770 FCC Part 90 A-Weight
DE-EMPHASIS 50µ S
SPECIFICATIONS
Microphones
Model No. WM-280 (Dynamic Microphone) WM-290 (Dynamic Microphone)
WM-270 (Electret Condenser Microphone) WM-370 (Lapel Microphone)
Frequency Range 168mHz~216mHz ______
Microphone Element TOA original dynamic, cardioid Shure SM58 dynamic, cardioid TOA original electret, cardioid TOA original electret, cardioid
Frequency Stability ±0.005% (for USA FCC part 90, 74) ±10kHz (for UK MPT1345), 0.002% (for Australia)
RF Carrier Power 15mW (except UK MPT1345)
Effective Radiated Power Less than 2mW (for UK MPT1345 only)
Maximum Input Level 144dBspl
144dBspl
127dBspl 115dBspl
Modulation (Max.) ± 15kHz deviation (for USA FCC part 90, Australia DOC 60) ±40kHz deviation (for USA FCC part 74, UK MPT1345)
Tone Frequency 32.768kHz
Controls Power on/off, Variable sensitivity control Power on/off
Battery 1 x LR6 (AA size) (15V) Alkaline
Current Drain 90mA typical (1.5V)
Battery Life More than 12 hours
Battery Indicator Green and Red LEDs
Antenna Internal dipole Internal dipole Internal dipole Internal loop
Ambient Temperature 14°F~122°F (-10°C~+50°C)
Dimensions ∅ 1.97" x 8.86" (0 50 x 225 0mm) 2.01" x 9.37" (051 x 238.0mm) 1.50" x 8.76" (038 x 222.5mm) 2.44" x 3.86" x 0.81"(62 x 98 x 20.5mm)
Weight 0.859 Ibs. (390g) with battery 0.859 Ibs. (390g) with battery 0.594 Ibs. (270g) with battery
0.198 Ibs. (90g) with battery
Standard Accessories 1 x Microphone holder, 1 x Color identification label (6 colors)
1 x Costume clip

SPECIFICATIONS
Receiver Frames
Model No. WT-870 (True diversity model) WT-770 (Non-diversity model)
Power Requirements AC mains or 12V~18V DC 400mA max. AC mains, or 12V~16V DC, 250mA max.
Power Consumption
10W (when operating with two tuner modules) 8W (when operating with two tuner modules)
Antenna Input 75 ohms BNC, Phantom powering for antenna 9V DC, 30mA max.
Audio Output -60dBV, 600 ohms, trans. balanced, XLR 3-32 or equivalent
Mixing Output
-60dBV 600 ohms unbalanced, for Mic output, 0dBV, 10k ohms, unbalanced, for line output, 1/4” phone jack
Ambient Temperature 14°F~122°F (-10°C~+50°C)
Dimensions 8.26” x 1.87” x 11.02” (210 x 47.5 x 280mm)
Weight Approx. 4.91 Ibs. (2.2kg)
Standard Accessories 1 x Power cable 1 x DC input connector 1 x Color identification label (6 colors)
Tuner Modules
Model No.
Power Supply
Receiving Circuit
Squelch Sensitivity
Maximum Deviation
Dynamic Range (SNR)
Distortion
Dimensions
Weight
Standard Accessory
WTU-870 (True diversity model) WTU-770 (Non-diversity model)
10V DC, 130mA 10V DC, 70mA
Single superheterodyne circuit
14dB µ V
15kHz (for USA FCC part 90, Australia DOC 60), 40kHz (for USA FCC part 74, UK MPT1345)
Better than 90dB (102dB: A-weight) (60dBpV, Deviation: 15kHz)
Better than 95dB (102dB: A-weight) (60dBuV, Deviation: 40kHz)
Less than 1%
2.36” x 0.96” x 5.47” (60 x 25 x 139mm) 1.65” x 0.79” x 4.17” (40 x 20 x 106mm)
0.34 Ibs (155g) 0.19 Ibs. (85g)
1 x Frequency label
Receiver Frames equipped with Tuner Modules
Model No.
Receiving Frequency
Receiving Sensitivity
Frequency Response
Residual Noise
WT-870 and WTU-870
WT-770 and WTU-770
168mHz~216mHz
Under 20dBµV (S/N: 70dB/Deviation: 15kHz)
Under 20dBuV (S/N: 80dB/Deviation: 40kHz)
50Hz~15kHz
Less than 30 µ V (8 µ V A-weight)
Overall System Performance
Model No. WT-870, WTU-870 and WM-280, WM-290 WT-770, WTU-770 and WM-270
Transmission Distance 100~330 feet (30~100m)
Dynamic Range
Better than 90dB (102dB: A-weight) (60dBµV, Deviation 15kHz) Better than 90dB (95dB: A-weight) (60dBµV)
Better than 95dB (102dB: A-weight) (60dBµV, Deviation 40kHz)
Distortion Under 1%
Antennas
Wireless Meeting Amplifiers
Model No
WA-641 (Wireless Meeting Amplifier) WA-642C (Cassette-Equipped Wireless Meeting Amplifier)
Power Requirements AC mains, 60Hz/DRY CELLS: 8 (R20P or “D” size)/EXTERNAL DC 10V~16V
Rated Output AC: 15W (max. 20W)/DC 6W
Power Consumption AC: 44W/DC: 1,300mA
Frequency Response 70~10,000Hz, 3dB deviation
Total Harmonic Distortion
Less than 3%
Inputs
Wired Mic: Mic 1,2 wired mic -54dBV, 600 ohms (Mic 1/2 are switchable with wireless microphone)/
Auxiliary -20dBV, 500k ohms
S/N Ratio Better than 70dB
Ambient Temperature AC 14°F-104°F (-10°C~+40°C)/DC: 32°F~104°F (0°C~+4O°C)
Dimensions 14.41” x 17.95” x 7.87” (366 x 456 x 200mm) (without handle and aerial)
Weight 16.1 Ibs. (7.3kg) 18.3 Ibs. (8.3kg)
Finish Light green (ABS resin)
TUNER SECTION (WTU-770)
Aerial System ROD aerial
Receiving Sensitivity 16dBµV (at 30dB of S/N ratio)
Squelch Sensitivity 15dBµV (0dB=lµV)
Receiving System Superheterodyne System
S/N Ratio Better than 60dB (at 60dBµV input)
CASSETTE SECTION
Track Format 2-track/1-channel (monaural)
Recording System AC bras
Tape Speed 1.78ips
Wow and Flutter 0.3% WRMS
Fast Forward/Rewind Time
Within 100 seconds (C-60 tape)
Model No.
Receiving Frequency
Dimensions
Weight
Finish
Model No.
Receiving Frequency
Output Impedance
Output Connector
Dimensions
Weight
Finish
Standard Accessory
Model No.
Receiving Frequency
Power Supply
Current Consumption
Output Impedance
Recommended Cable
Dimensions
SCOUT Receiver
Model No.
Power Requirements
Power Consumption
Receiving Frequency
Receiving Sensitivity
Squelch Sensitivity
Frequency Response
Residual Noise
Antenna
Audio Output
Ambient Temperature
Dimensions
Weight
Standard Accessory
WT-780 (Non-diversity model)
AC mains
3W
168mHz~216mHz
Under 20dBµV (S/N 75dB/Deviation: 15kHz)
Under 20dBµV (S/N 60dB/Deviation: 40kHz)
Approx. 14dBµV
50Hz~15kHz
Less than 30µV (8µV: A-weight)
Telescopic antenna
-10dBV, 10k ohms, unbalanced, 1/4” phone jack
14°F~ 122°F (-10°C~+50°C)
5.51”x1.22”x4.27”(140x31x108.4mm)
Approx. 0.572 Ibs. (260g)
1 x AC/DC adaptor
Overall System Performance
Model No. WT-780 and WM-270
Transmission Distance 100~200 feet (30~60m)
Dynamic Range Better than 90dB (95dB: A-weight) (60dBµV)
Distortion Under 1%
Antenna Distributor
Model No.
Power Requirements
Frequency
Gain
Noise Index
Maximum Input Voltage
Inputs
Outputs
Ambient Temperature
Finish
Dimensions
Weight
Standard Accessory
Weight
Finish
Standard Accessories
WD-770 (Antenna Distributor)
DC 12V~18V or DC 24V (±10%). under 100mA
166mHz~216mHz
3dB±3dB
Less than 10dB
1OOdBµV
2.75 ohms, BNC (Antenna power supply 8V DC, 35mA max.)
4.75 ohms, BNC
14°F~122°F (-10°C~+50°C)
Panel Aluminum. black
Case Steel, dark gray
8.26” x 1.81” x 11.02” (210 x 46 x 280mm)
Approx. 0.81 Ibs. (1.8kg)
1 x AC/DC adaptor
YW-600 (Whip Antenna)
168mHz~216mHz
Antenna element length 14.57” (370mm)
Maximum connector diameter 0.59” (15mm)
Approx. 0.048 Ibs. (22g)
Antenna element Stainless steel
Resin part: Polyacetal
Other part Nickel plating
YW-610 (Mic Stand Mounting Antenna)
166mHz~216mHz
75 ohms
BNC jack
Antenna element & base: 19.29” (490mm)
Stand mounting bracket.
1.18” x 3.54” x 1.69” (30 x 90 x 43mm)
Approx. 0.32 Ibs. (145g)
Antenna element Stainless steel
Resin part Polyacetal
Antenna base Off-white paint
Other part Nickel plating
1 x Bracket mounting screw
YW-620 (Dipole Antenna)
166mHz~216mHz
9V DC, (SuppIied from WT-770 or WT-870)
Less than 22mA
75 ohms
RG-59/U. or RG-6/U
Antenna element 15.75” x 2 (400mm x 2)
Main Body: 1.3” x 3.6” x 7.9” (32 x 90.5 x 200mm)
Approx. 0.44 Ibs. (200g)
Antenna element Stainless steel
Resin part: ABS
Antenna base Off-white paint
Other part Nickel plating
1 x RG-59/U sleeve, 2 x Wood screw,
2 x Machine screw
Specifications are subject to change without notice.

ARCHITECT’S AND ENGINEER’S SPECIFICATIONS
TOA Password 870 True Diversity, 780/770 Non-Diversity Wireless
System/600 Series Portable Meeting Amplifier
The wireless system shall include a transmitting system consisting of a
battery powered transmitter integral to a hand-held microphone or body-
pack plus lapel microphone and a receiving system consisting of an AC
powered receiver unit and associated antenna. All receiver units, except
the 780, shall have two ports to accept plug-in receiver modules for up to
two channels of operation. The 780 shall include a single integral receiver.
System configurations shall be as detailed below. Nominal transmitter RF
output level shall be a minimum of 15mW from 168mHz to 216mHz, FM, at
better than ±0.005% frequency stability.
23 different operating frequencies shall be available for the 168mHz to
216mHz range. Companding circuitry with a 2 : 1 ratio shall be utilized
with signal dependent attack and release times. The receiving system
shall have an RF squelch sensitivity preset to 14dB µ (5µV) and a separate
muting circuit that will deactivate only while a 32.786kHz tone IS being
received. The sensitivity of the receiving system shall be less than 20dBµ
(10 µV) for 70dB quieting. At 60dBµ (1mV) received signal, system
dynamic range shall be better than 90dB (102dBA). Distortion for the
combined transmitting and receiving system shall be less than 1% THD.
The 87-0 receiving system shall utilize diversity circuitry whereby the
receiver module continually compares the received signal strength of the
two antennas connected to the receiver frame and automatically uses the
one with the strongest signal. RF carrier presence indicators shall show
which antenna has been selected by the diversity circuitry.
For the 870/770, there shall be a power on/off switch and power-on
indicator for the receiver frame. The receiver frame shall have two front
ports for easy installation and removal of the receiver modules and their
associated tuner panels. The 870/770 tuner panels shall have peak audio
and carrier presence indicators and an audio volume control. The receiver
rear panel shall have the following: male XLR connector for each channel’s
nominal -60dBV transmitter balanced audio output, a 1/4" phone jack (tip/
sleeve) for an unbalanced summed output of the two channels; a switch to
select the summed output level. -60dBV or 0dBV; one BNC type connector
DIMENSIONAL DIAGRAM
WT-870
Dual-channel Diversity Receiver Frame
WD-770
Antenna Distributor
WT-770
for each (870) receiving antenna, or each channel’s (770) receiving
antenna, and one DC input connector.
Models 870 and 770 shall be capable of operating with TOA antenna
distributor model WD-770. The antenna distributor shall convert input
from a single antenna or pair of antennas into eight separate frequencies
to eliminate the need to provide additional antennas when more than two
frequencies are used within the system.
The 780 receiver shall have peak audio, RF carrier presence and power-
on indicators; an audio volume control, a 1/4" phone jack (tip/sleeve) for
the nominal -10dBV unbalanced audio output, and a DC input connector.
The receiving antenna shall be a replaceable telescoping whip.
For the 600 Series, the two models WA-641 & WA-641C (with Integrated
cassette player) shall 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, and a built-in
telescoping antenna.
The systems shall comply with parts 74 and 90 of FCC Regulations.
Power for the 870 receiver module shall be supplied by the receiver
frame. Power consumption for the receiver frame with two receiver
modules installed shall be eight watts AC or 250mA at 12V to 18V DC
from an external DC power source.
Power for the 770 receiver module shall be supplied by the receiver
frame. Power consumption for the receiver frame with two receiver
modules installed shall be ten watts AC or 400mA at 12V to 18V DC from
an external DC power source.
Power for the 780 receiver shall be three watts AC mains using a supplied
AC mains to DC adapter or 110mA at 12V DC.
The 600 Series units shall be capable of being operated with AC mains
(35W), eight “D” batteries, or an external DC power supply of 1,200mA,
12V at full output
Note: 0dB=0.775V RMS, 0dB µµ =1 µµ V RF
Dual-channel Receiver Frame
WA-641/WA-641C
600 Series Portable Meeting Amplifiers
WT-780
Single-channel Receiver
Unit: inch (mm)
TOA Corporation
Printed by QQ Printing 2/97