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X-Talk Test
X-TALK is shorthand for Cross-Talk. Cross-Talk is interference between two
signals, such as IDNet/MAPNET channels. The X-TALK test measures the
impedance between the POSITIVE lead of two IDNet channels. Coupling can
be caused by capacitive, resistive or inductive impedance between two
electrical signals. The greater the coupling between two electrical signals is,
the greater the likelihood of communications errors.
To initiate the X-TALK Test, navigate to the
X-TALK screen. Connect the wires as
shown in the table. Press ENT. The test
results are displayed when the XTALK Test
is complete. To test a different cable pair,
move the Green wire to the +IDNet of the
next channel, press menu, then when X-
TALK Test is displayed, press ENT. The X-TALK test may be conducted on
two IDNet channels (connect IDNet+ as described in the table). It may also
be used between RUI and IDNet, or IDNet and IDNAC.
To Test
Connect
IDNet
RED lead to +IDNet wiring of Channel "A"
BLACK lead is not connected to field wiring
GREEN lead to +IDNet wiring of Channel "B"
Test Results are displayed and indicate the severity of the coupling between
the channels
LOW Coupling
- Best Result. Indicates no cross-talk between the channels
tested
MODERATE Coupling
- Indicates that coupling is adequate to cause some
communications errors. The level of cross-talk would usually not be visible at
the front panel, because the panel re-tries when a communications error takes
place. If the re-try is successful, the panel will ignore the comms error and will
not indicate any fault.
HIGH Coupling
- Indicates that coupling between the two IDNet channels is
too severe for reliable communications
ENT
X-TALK Test Complete
High Coupling
Failure
Press MENU to exit
