User manual EXPERT 2K-FA
Pag. 41 of 41 Issue 2 – May 2011
13.3 CONNECTIONS / TX-INH, TX-INH
All modern transceivers have a delay before the transmission to allow the linear to
stabilize their relays avoiding damage to them and possible effects of "Hot Switching".
The Expert 2K-FA has a settling time of only 6.5 msec. compatible with all modern
transceivers (see the manual of the transceiver).
Some transceivers have an input (called TX-INHIBIT, LINEAR, MUTE, etc..) which
disables the transmission.
This input can be used with transceivers that do not have such delay or, more generally,
to improve the safety of switching.
The Expert 2K-FA has two outputs that can be connected to the TX-INHIBIT of the
transceiver:
a) TX-INH, usually gnd. (550 ohm), stops the transmission when @ + 12V.
b) / TX-INH, open collector normally off, stops the transmission when it goes to ground
(on).
To choose a) or b) as well as to enable the TX-INHIBIT input , refer to the manual of the
transceiver.
TX-INH Link
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