![background image](http://html1.mh-extra.com/html/texas-instruments/ri-mod-tx2a/ri-mod-tx2a_reference-manual_1097016013.webp)
18 November 1996
Multiplexer Module (TX2A/TX4A)
MUX-13
2.2.2 Jumpers
There are 3 jumpers on the Multiplexer, for location of the jumpers please refer to figure 7. The
jumpers are described in detail following:
J2
J5
J7
Figure 7: Jumper Locations
J2
This jumper is used to enable all TX/RX channels. When this jumper is open, all TX/RX channels
are disabled. When it is closed, all TX/RX channels are enabled.
Default:
J2 closed
J5
This jumper is used to connect the antenna terminal GNDTX (pin 2 of connector J4) to the
Multiplexer ground GND.
When using the Multiplexer together with the S2000 RFM, this jumper has to be closed. When
using the Multiplexer together with the Power RFM or the S25x0 Reader, this jumper must be
opened.
Default:
J5 open
J7
This jumper is used to connect the Multiplexer mounting bolt to ground GND. The Multiplexer can
be earthed via the mounting bolt when necessary.
Default:
J7 open