RF-Link NL6000 - Manual (Page 26)

RF Neulink NL6000 User Guide 26
a programming state. If the mode is set to DCD 232, certain I/O devices can
wake up when the DCD signal is asserted and turn off when the signal is
negated.
5.7.4. Pre- and Post-Data DCD Time
Two additional parameters, Pre-Data DCD Time and Post-Data DCD Time,
must be set when using the DCD 232 option. The pre-data time value sets the
number of milliseconds it takes for the device to wake up after the modem
asserts the line. The post-data time value sets the number of milliseconds it
takes for the device to turn off after the modem negates the line. These
settings ensure the modem does not transmit data unless the device is ready.
Figure 16 illustrates the pre- and post-DCD time periods.
Figure 16: Pre- and Post-DCD Time
5.8. Planning the RF Channel
For each unit in the network plan, you must specify the active channel as well
as receive and transmit frequencies used on that channel. Determine these
radio parameters as part of your network plan.
Each NL6000 unit arrives from the factory tuned and tested on the default
frequency appropriate for that unit. Retuning requires that a qualified radio
technician use the procedures in Appendix A
Diagnosing and Correcting
Performance Problems.
5.9. Factory Default Parameters
Appendix B provides a list of the default parameters set for each NL6000 unit
at the factory. It also provides a blank column for you to record any custom
values you want to set.