RF-Link Technology NL6000 manual Use a Fully-Wired RS-232 Cable, Use a Slower Baud Rate

Page 44

8.2.4.Use a Fully-Wired RS-232 Cable

Some RS-232 cables, especially those hand-made, may not have all of the flow control wires connected. If your application supports hardware flow control (RTS/CTS), then ensure that the cable connecting the NL6000 to the host device has all of the wires connected. Refer to section 4.3.

8.2.5.Use a Slower Baud Rate

If the input baud rate is higher than the over-the-air bit rate, long strings of data are going into the serial port, and flow control is not used, the NL6000 buffers may fill up and lose data. Lower the NL6000s baud rate and the host device baud rate to as slow as practical.

8.2.6.Use a Faster Baud Rate

If system time-outs, caused by a remote site not responding fast enough, are a problem, you may consider increasing the serial baud rate at both ends of the radio link. High baud rates along with hardware flow control should yield a fast, reliable system.

8.2.7.Unit Does Not Enter Programming Mode

If you forget what baud rate the NL6000 is set to, you will not be able to get into the programming mode with the /// command without trying all baud rates on your terminal. Instead, if you enter three break characters within 10 seconds on the terminal, the modem goes into programming mode at 9600 baud. From this point you can reset the baud rate with the Baud Rate parameter on the Serial menu.

Make sure you use a cable that connects RTS and CTS from the modem to the computer, not just RX and TX. You need this cable connection before trying the three break characters that enter programming mode.

RF Neulink

44

NL6000 User Guide

Image 44

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 OverviewFeatures Configuration Templates Single and Multi- Point AddressingAcknowledgement Auto-TransmitSafety Warning Regulatory InformationFCC Part 406.0 to 406.1 MHz OperationSpecifications General SpecificationsUHF Radio Specifications Current Drain at 12Transmitter ReceiverVHF Radio Specifications Hardware Installation and Operation Power ConnectionsParts Description Serial PortDTE DCEAntenna Connection LEDsOperation LEDSoftware Configuration Technical SupportPrerequisites PreparationUnique Data Requirements for a Base Station Source and Destination AddressingBehavior of Repeater Units Addressing with WildcardsRepeat from a Base to a Remote Repeat to Multiple Remotes using Wildcard Transmission Mode Packet Data OptionsCRC FECRF Neulink NL6000 User Guide Over-the-Air Data Rates AcknowledgementsCarrier Sense Multiple Access DCD ModeSerial Connection to an I/O Device Basic Serial ParametersPre- and Post-Data DCD Time Factory Default ParametersPlanning the RF Channel Procedures Select Network ä Unit TypeGeneral Procedures Displaying the Configuration Summary Window Returning to the Previous MenuRadio Network Setup Setting the Unit Type Select Network ä Unit TypeSetting the Unit ID Myid Select Network ä Myid Setting the Target Unit ID ToidSerial Connection Setup Data Setup Setting the Packet Mode Select Network ä Packet ModeSetting the Data Rate Select Network ä Data Rate Setting the Request ACKs OptionSetting the Contention Option Select Network ä Contention Setting the Max Retries OptionRepeater Setup Trigger ID Value UseDownloading a Software Upgrade File ManagementRestoring Parameters from Disk Select Save/Restore Parameters ä Save Parameters to DiskSaving Parameters to Disk Restoring Default Parameters Menu Quick Reference Main Menu Summary WindowSerial Menu DCD RS-232 SubMenu Network Menu Repeater SubMenu Radio Menu Diagnostics Menu Save/Restore Parameters Menu Duty Cycle TroubleshootingOther Considerations Use a Fully-Wired RS-232 Cable Unit Does Not Enter Programming ModeUse a Slower Baud Rate Use a Faster Baud RateAppendix a Diagnosing and Correcting Performance Problems Setting the Frequency Trim includes setting PowerSetting the Power Value Select Diagnostics ä Transmit Continuous Random DataSetting the Deviation and Balance ∙ Select Frequency Trim from the Diagnostics menuSelect Diagnostics ä Transmit 100 Hz Square Wave ∙ Select Radio Ä Transmit Frequency for Active ChannelSetting the Receive Gain ∙ Select Deviation from the Diagnostics menu∙ Select Diagnostics ä Receive Diagnostic Mode ∙ Select Diagnostics ä Receive GainFactory Default Values Appendix B Factory Default ParametersCategory Parameter Default Value Custom Value Index RF Neulink NL6000 User Guide