Larson Davis System 824 - Logic Output #2; Logic Output #2 Time Setting; Heater on; E. A. Cal Tone

7-14 824 Reference Manual 11/8/00
NOTE: If set below 5 seconds, the output
will remain “ON” as long as the condi-
tions are true, and turn “OFF” x sec-
onds (0 to 5) after the condition; if set to
6 seconds or greater, the output will stay
“ON” for at least 5 seconds but will turn
“OFF” as soon as the condition
becomes false or the condition has lasted
the number of set seconds (i.e. 0-5 mini-
mum time, 6-255 maximum time).
Logic Output #2 Logic-Out #2
works the same as Logic Output and has the
same options as shown above.
NOTE: When Logic-Out #2 is not off
then the Heater Control setting has no
effect. It is overriden by Logic-Out #2.
Logic Output #2 Time Setting
The
Logic Output #2
Time sets the number of seconds that
the output will remain turned “ON” following a triggering
event. See
Logic Output Time
setting above.
Heater On
The
Heater Control output
selects the functionality of pin 8
of the control connector. It is an “open drain” output such
that when asserted, the Heater output sinks current to
ground; when unasserted no current flows. It has a maxi-
mum rating of 40 volts.
The “
Heater On
” setting provides the following options:
No
- Is unasserted; which is considered OFF (line
can be used as Logic output #2)
Yes
- Is asserted; which is considered ON
E. A. Cal Tone
The
E. A. Cal Tone
setting is used to manually control the
Electrostatic Actuator (E. A.) of an outdoor microphone sys-
tem. It is a CMOS output that drives from 0 to +5 volts
through a 10,000 ohm current limiting resistor to pin 7 of the
control connector; +5 volts is the asserted state.