User's Manual

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1.2 THE “BATTERY LEVEL” INDICATOR.
This red lamp, located internally, verifies that battery voltage is adequate to
transmit a signal over the specified range. It is actuated while the external button
is pressed and the channel number switch is set to position “0”.
This lamp flashes intermittently in bursts of one, two, or three flashes at a time if
the battery has enough capacity to power the transmitter. If no flashing occurs,
the battery must be replaced before the transmitter can be used reliably. Three
flashes per burst indicate that the battery has full capacity, two flashes indicate
that its capacity is beginning to diminish, and one flash indicates that it is near
the end of its useful lifetime in which case it should be replaced immediately after
the current use. Adequate transmitter output to achieve the specified range will
occur as long as the battery voltage is above approximately 2.6 volts, but the
battery voltage will drop rapidly at this point.
1.3 THE TRANSMIT INDICATOR.
This red lamp, located internally, lights continuously while the transmitter is
generating RF output.
1.4 THE FIRE BUTTON.
This button is located under a protective hinged cover on the top of the
transmitter. For safety, the hinged cover must be open in order to press the
button. The transmitter’s microcomputer and RF circuitry are powered from an
internal 3 volt battery which is only connected while this button is pressed. All
circuitry is powered off while this button is not pressed.
1.5 THE BATTERY.
Power is supplied from a CR2032 lithium three volt coin-type battery, accessible
by removing one of the transmitter’s side plates. This battery should be replaced
when required by conditions described in section 1.2 above. CR2032 batteries
are readily available and can be purchased at RadioShack stores. Be sure to
observe correct polarity when inserting a new battery.
1.6 THE CHANNEL NUMBER SWITCH.
This switch, located on the internal circuit board with silk-screened identification,
is accessed by removing a transmitter side-plate. It is a 16 position miniature
rotary switch that can be rotated with a small screwdriver. Positions 1 through 6
are used to select transmitter channel 1 through 6, respectively. Position 0 is
used to select battery test mode as described in section 1.2. No transmission can
occur in this mode. The remaining switch positions are not used.