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1.3
THE "XMTR ENABLED" INDICATOR.
This green lamp, located at the "Enabled" position of the lockswitch, warns the
user that transmission will occur when a button is pressed or an acoustic event is
sensed, and that battery drain is occurring. It also verifies that battery voltage is
adequate to transmit a signal over the specified range.
When the transmitter is turned on (transmitter enabled) with the keylock switch,
battery status is indicated by the flashing of this lamp. It is of sufficiently high
intensity to be visible in direct sunlight and will flash 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 7.0 volts, but the battery voltage will drop rapidly at this
point.
If in acoustic trigger mode (digital switch positions 0 – B), this indicator will glow
continuously while the "Fire A / Enable B" button is pressed. Only while glowing
continuously can command transmission occur in response to an acoustic event
or a "Fire B" button press.
1.4
THE FIRE BUTTONS.
These buttons are snap action dome switches under a sealed overlay, labeled
"Fire A" and "Fire B", respectively. They have a high spring constant which
requires a firm depression for actuation, decreasing the likelihood of accidental
depression. The enabled transmitter can be kept in a shirt or jacket pocket
without fear of accidental button depression. The action of the buttons depends
on the position of the transmitter's digital switch.
1.4.1 Acoustic Trigger Mode (digital switch positions 0 – B)
For safety, transmission is enabled only while the "Fire A / Enable B"
button is depressed.
occur immediately upon depression of the "Fire A / Enable B" button
if acoustic events are occurring. Do not press the "Fire A / Enable B"
button until it is quiet, and all persons who might be harmed by
device actuation are in a safe area.
depressed, the green "Xmtr Enabled" indicator will glow continuously, and
"A command" (semi-automatic fire) transmission will occur while an
acoustic event is being detected by the rear-panel microphone. Each
detected acoustic event will result in the firing of the next sequential
receiver output. Transmission will occur for 250 msec following an
acoustic event, and maximum sense rate is approximately 3 events per
second. An acoustic event is defined as a sound impulse exceeding the
switch selected threshold. (See section 1.7)
Be aware that fire command transmission can
While "Fire A / Enable B" is
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