User's Manual

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This manual is divided into two sections. The first is a description of the system hardware. The
second covers the recommended operating and maintenance procedure.
1.0 HARDWARE DESCRIPTION.
The model XMTR1M Single Command Transmitter is a low power hand-held remote
control transmitter which transmits a single fixed encoded command with an attached
channel number code and group number code while its external pushbutton is pressed.
No transmission occurs while its button is not pressed.
The transmitted channel number code and group number code are determined by the
settings of their respective internal digital switches. Only those receivers which match
the transmitted codes will be activated by the transmission. Transmission occurs on 418
MHz with amplitude modulation of the carrier (binary “1” = carrier on, binary “0” = carrier
off). The transmitter’s frequency is synthesized via phase-locked loop referenced to a
high precision crystal oscillator for exceptional stability and minimum influence by
antenna proximity. No alignment or tuning procedures are ever required to maintain
optimum performance.
There are six different selectable digital channel numbers. Transmitters set to separate
digital channel numbers can transmit simultaneously without interfering with each other,
even though they operate on the same frequency. This permits up to six different
receivers or groups of receivers to be controlled by six separate transmitters
simultaneously. A transmitter will only actuate receivers whose digital channel and group
switches are set to the same channel and group as the transmitter. Transmitters fixed to
the same digital channel number will interfere with each other and result in failure-to-fire
when actuated simultaneously, even if set to separate group numbers.
The user has access to the following components:
1.1 THE ANTENNA.
The RF signal is radiated by a quarter-wave helical antenna which screws onto a
reverse polarity SMA jack on the bottom end of the transmitter box. Use of any
antenna other than the one supplied with the transmitter is prohibited under
FCC
Rules and Regulations as listed in CFR 47, part 15. The transmitter should
never be operated without this antenna in place, as damage to the RF
components could result. Such operation will void the warranty.