4-Channel Hand-Held Wireless Transmitter
1 1 1 1 . INTRODUCTION
The WT-104 is a miniature, 4-channel hand-held wireless trans-
mitter, designed to operate with Visonic Ltd. wireless receivers of
the WR-200 and WR-300 series.
Transmission is activated by pressing any one of the 4 recessed
buttons on the unit. Transmitted data consists of a system code
(see Para. 3.2 below) and one of four different channel codes that
activates the corresponding output of the target receiver.
The transmitter is powered by a 12 volt alkaline battery. An LED
lights during transmission, indicating the battery voltage condition. If
the LED does not light during transmission, the battery must be
All WT-104 units are supplied with a key-holder installed. A neck
chain is also included in the package, to permit the unit to be
worn as a pendant transmitter.
2 2 2 2 . SPECIFICATIONS
Frequency (MHz): 315, 404, 418, 433.92 or other frequencies
per local requirements.
Encoding: 8-bit digital word, 256 combinations, pulse width
Power Supply: 12-volt alkaline battery (Duracell MN-21, Golden
Power GP-23A, or equivalent).
Attention: Transmitter characteristics may be affected by battery
3 3 3 3 . INSTALLATION
3.1 Battery Installation
A. Open the case by removing the screw from the back cover.
B. Insert the 12-volt alkaline battery (Duracell MN-21 or Golden
Power GP-23A or equivalent) between the battery clips, so
that the (+) and (–) markings on the battery are in the same
direction as the markings on the P.C. board (close to each
battery clip - see Figure 1). Check that the battery is held
securely by the battery clips.
C. Gently press one of the pushbutton switches and verify that
the LED lights, indicating good battery condition.
A. All WT-104 units have an
(marked 1 to 8). Each switch
may be set to ON or OFF
position, to create a unique
digital system code - see
Figures 1 and 2.
B. Use a ball point pen to set each of the switches to match the
code setting of the companion receiver.
CAUTION: The code combination 2, 4, 5, 6, 7 ON / 1, 3, 8
OFF is a factory test code which must not be used. Also avoid
codes which are often used: all keys ON, all keys OFF or
alternating ON/OFF settings.
Figure 2. Code Selector
Figure 1. WT-104 with Front Cover Removed
Transmit Indicator: Lights if the battery voltage exceeds 8 VDC.
Operating Temperature: 0° to 49°C (32° to 120°F).
Dimensions: 35 x 80 x 18 mm (1-3/8 x 3-1/8 x 3/4 in).
Weight: 28 g (1 oz).
Standards: Designed to meet FCC Part 15; meets MPT 1340,
ETS 300 220, ETS 300 339 and ETS 300 683 (CE approved).
C. Carefully position the front cover hole over the LED. Secure
the front cover with the screw (through the back cover).
A. Carefully position the front cover hole over the LED. Secure
the front cover with a screw (through the back cover).
B. Stand 10 feet away from the receiver and press the Channel 1
(Gray) button on the WT-104 .
Note: Verify that the transmission indicator lights, indicating
good battery condition.
C. Observe that the receiver LED lights, indicating detection of
the transmitted RF signal.
D. Verify activation of the CHANNEL 1 relay at the receiver.
E. Repeat steps B through D for channels 2, 3 and 4.
F. Operate the transmitter from various locations within the
protected area to determine "dead" spots, where transmission
is affected by structural materials etc.
3.4 Neck Chain Installation
A. Remove the key-ring leaving the triangle installed on the
bottom of the WT-104.
B. Open the chain and slip it through the triangle.