4
The standard version of the TX3000 board allows the 82Hz sinusoidal modulated 8.2
MHz HF carrier signal to be:
−
generated locally (oscillator circuit for master applications), or alternatively.
−
to be regenerated from an optically received swept HF signal of another
TX3000 (opto receiver for slave applications).
The bi-opto version of the TX3000 additionally allows the onboard generated (master) or
received-and-then-regenerated- (slave)-swept HF-signal to be converted and optically
transmitted in order to synchronize additional transmitters.
The two opto transmitters used in the bi-opto version allow:
−
a master transmitter to synchronize two other optically slaved (and possibly
repeating) transmitters.
−
an optically slaved transmitter to be used as repeater to synchronize two other
optically slaved transmitters.
By using 3 bi-opto transmitter boards (TX3000) (one used as synchronization master and
two as synchronization repeaters) and 4 standard TX3000 (as synchronization slaves),
clusters of up to 7 TX3000 may be synchronized. This way up to 7 checkout or 14
exit-gates (in a row) may be configured without need of a master rack.
Since the optically transmitted synchronization signal may be repeated only once, a
master rack still has to be used if more than seven transmitters have to be synchronized.
The cable version of the TX3000 additionally allows the onboard generated (master) or
received-and-then-regenerated- (slave)-swept HF-signal to be converted and optically
transmitted in order to synchronize additional transmitters.
The two cable transmitters used in the cable version allow:
−
a master transmitter to synchronize, a other optically slaved (and possibly
repeating) transmitters.
Two block diagrams and layout of the TX3000 board are shown on the next 2 pages.
The board consists of a digital part
，
an analog part and a power supply/filter part.
The standard version of the TX3000 is fully equipped with the exception of the two
optional opto transmitters. It can be used as a master-TX3000 for small installations
(single or dual gates equipped with one TX3000 only) or as slave-TX3000 for all larger
applications.
The bi-opto version of the TX3000 board is almost identical to the standard version. The
only difference is that the two opto transmitters (IR-LED's) are already mounted. The
bi-opto TX3000 board can be used as a Master-TX3000 in medium installations (2 to 7
TX3000) or as synchronization signal repeating Slave-TX3000 for medium to very large
installations.
