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mbosv_eng (25.02.2014)
mbosv_eng (25.02.2014)
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Opto-Coupler Input
The
opto-coupler input
on
ST5
can be configured via
Web interface
to fulfill different
tasks in the same way as all inputs can be.
To
activate
the opto-coupler input, a direct current (3V < U < 15V) is necessary that can
be obtained directly from
ST14a/2
. For higher ext. switching voltages an additional external
dropping resistor is necessary (internal dropping resistor = 1kohm).
Functions for TETRA Digital Radios
Using TETRA, speaking is not possible until the conversation is initiated. Therefor, the
radio transmits an attention tone. Usually, this tone cannot be heard in the loudspeaker
as it is muted when transmitting. Hence, the PTT button must be configured so that the
loudspeaker is not muted when it is pressed.
