- 4 -
ft634a (23.06.2009)
Kompetent für Elektroniksysteme
- 5 -
ft634a (23.06.2009)
Kompetent für Elektroniksysteme
Channel switching
Remote switching of channels is achieved by transmitting certain 5-tone sequences. The interface to
the two-way radio device is parallel. The channel switching status output can be "binary", "binary-1",
"decimal" and "2xBCD". The channel output can be inverted if necessary.
Option line monitoring
The operating mode line monitoring can be configured for the FT634aCL. To do this devices with
this option are needed at both ends of the line. Line monitoring is only active during idle times of the
wire.
For this one of the devices has to be configured as master, the other as slave. The master device then
scans the slave device in certain intervals. If there is no reply or the slave-device doesn´t receive a
scan by the master-device within a certain interval, one of the switching outputs can be programmed
as error indicator.
Transmitter control
The transmitter control is activated as soon as the AC-line receives and decodes the pilot tone. Then
the PTT-output is switched by a potential-free relay. The PTT-output can also be controlled by DC- or
AF-decoding (register 053/1).
Functions of the LEDs
The
green LED
is on when the pilot tone is decoded by the AC-line or a DC potential is applied or
AF is decoded depending on the configuration. The green LED blinks when there is a decoding but
the switching of the transmitter relay is suppressed.
The
yellowlbe LED
is on when the pilot tone was activated or DC applied to the line or the AF
connected to the line. The yellow LED blinks when the activation of one of the afore-mentioned
functions is suppressed.
LED green
transmitter relay on
because
- Pilot tone was decoded or
- DC was decoded or
- AF was decoded
(blinking see description)
LED yellow
- Pilot tone turned on or
- DC applied and
- AF connected to the line
(blinking see description)
