User's Manual

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1.9 SPECIFICATIONS.
Parameter Minimum Typical Maximum
Carrier Frequency, MHz. 417.96 418.02 418.08
Range (line-of-sight) 1500 ft
Delay from start of button depression
to receiver output (fewer than 4
transmitters transmitting
simultaneously)
150 msec 175 msec
Delay from start of button depression
to receiver output (more than 3
transmitters transmitting
simultaneously)
200 msec 400 msec
Button depression time (fewer than 4
transmitters transmitting
simultaneously)
100 msec
Button depression time (more than 3
transmitters transmitting
simultaneously)
400 msec
Battery current, average, (xmting) 10.0 mA
Battery current, (not xmting) 0.0 mA
Low Battery Detect Threshold 2.6 V
Transmitter Supply Voltage 2.5 V
2.0 OPERATION AND MAINTENANCE.
This section describes the recommended operating procedure and maintenance for the
transmitter.
2.1 OPERATION.
2.1.1 Before using the transmitter, ensure that its channel number and group
number switches are set to the desired numbers as described in the 3
rd
paragraph of section 1.0. The switches are accessed by removing a
transmitter side-plate. They are located on the internal circuit board with
silk-screened identification as described in sections 1.6 and 1.7.
2.1.2 To activate the transmitter, flip up the protective top cover, and then press
the exposed pushbutton. No power is consumed from the battery until the
button is pressed. The transmitter should be held in a vertical orientation,
away from the body and other conductive objects to achieve maximum
range and communication reliability. Generally, the higher the transmitter
is held, the greater the range. Conductive objects such as chain-link
fences, aluminum bleachers, and automobiles in the transmission path
will reduce the range