Planning the RF Channel | RF-Link Technology NL6000 instruction

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.

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NL6000 User Guide

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RF-Link Technology NL6000 manual Planning the RF Channel, Factory Default Parameters, Pre- and Post-Data DCD Time

Contents

NL6000 Wireless Modem Copyright Table of Contents RF Neulink NL6000 User Guide RF Neulink NL6000 User Guide Use the NL6000 in a Simple Configuration Product Overview Features Acknowledgement Configuration TemplatesSingle and Multi- Point Addressing Auto-Transmit FCC Part Safety WarningRegulatory Information 406.0 to 406.1 MHz Operation Specifications General Specifications Transmitter UHF Radio SpecificationsCurrent Drain at 12 Receiver VHF Radio Specifications Parts Description Hardware Installation and OperationPower Connections Serial Port DTE DCE Operation Antenna ConnectionLEDs LED Prerequisites Software ConfigurationTechnical Support Preparation Unique Data Requirements for a Base Station Source and Destination Addressing Behavior of Repeater Units Addressing with Wildcards Repeat from a Base to a Remote Repeat to Multiple Remotes using Wildcard Transmission Mode Packet Data Options CRC FEC RF Neulink NL6000 User Guide Over-the-Air Data Rates Acknowledgements Serial Connection to an I/O Device Carrier Sense Multiple AccessDCD Mode Basic Serial Parameters Pre- and Post-Data DCD Time Factory Default ParametersPlanning the RF Channel Procedures Select Network ä Unit Type General Procedures Displaying the Configuration Summary Window Returning to the Previous Menu Setting the Unit ID Myid Select Network ä Myid Radio Network SetupSetting the Unit Type Select Network ä Unit Type Setting the Target Unit ID Toid Serial Connection Setup Data Setup Setting the Packet Mode Select Network ä Packet Mode Setting the Contention Option Select Network ä Contention Setting the Data Rate Select Network ä Data RateSetting the Request ACKs Option Setting the Max Retries Option Repeater Setup Trigger ID Value Use Downloading a Software Upgrade File Management Restoring Parameters from Disk Select Save/Restore Parameters ä Save Parameters to DiskSaving Parameters to Disk Restoring Default Parameters Menu Quick Reference Main Menu Summary Window Serial Menu DCD RS-232 SubMenu Network Menu Repeater SubMenu Radio Menu Diagnostics Menu Save/Restore Parameters Menu Duty Cycle TroubleshootingOther Considerations Use a Slower Baud Rate Use a Fully-Wired RS-232 CableUnit Does Not Enter Programming Mode Use a Faster Baud Rate Setting the Power Value Appendix a Diagnosing and Correcting Performance ProblemsSetting the Frequency Trim includes setting Power Select Diagnostics ä Transmit Continuous Random Data Select Diagnostics ä Transmit 100 Hz Square Wave Setting the Deviation and Balance∙ Select Frequency Trim from the Diagnostics menu ∙ Select Radio Ä Transmit Frequency for Active Channel ∙ Select Diagnostics ä Receive Diagnostic Mode Setting the Receive Gain∙ Select Deviation from the Diagnostics menu ∙ Select Diagnostics ä Receive Gain Factory Default Values Appendix B Factory Default ParametersCategory Parameter Default Value Custom Value Index RF Neulink NL6000 User Guide