RF-Link Technology NL6000 manual Other Considerations, Duty Cycle, Troubleshooting

Page 43

8.Other Considerations

8.1.Duty Cycle

When the NL6000 transmits data, it generates heat and the case gets warm. If the NL6000 is forced to transmit large amounts of data without a cooling-off period, damage due to excessive temperature can result.

There are two considerations: first, limit data transmission time so that the unit will not overheat. Second, limit the duty cycle of data transmission. When operated in still air, the limits in Table 4 apply.

Power Output

Temperature

Duty Cycle

Maximum Data Transmission

6W

25° C

30%

15 Seconds

6W

60° C

5%

5 Seconds

3W

25° C

50%

20 Seconds

3W

60° C

5%

5 Seconds

1W

25° C

75%

30 Seconds

1W

60° C

10%

5 Seconds

Table 4: Duty Cycle and Transmission Limits

The limits above can be increased significantly by placing heat sinks on the unit and/or cooling with forced air.

8.2.Troubleshooting

8.2.1.Use a Good Antenna

The antenna is the most important, but often ignored, part of the communication system. A good antenna system will increase range, increase throughput, and increase reliability. You can use directional gain antennas when operating in a point-to-point configuration.

8.2.2.Three-wire Interface

When using a three-wire RS232 interface (TX, TX, GND), you must disable RTS/CTS flow control. You may enable the XON/XOFF protocol if software flow control is required. Refer to Section 5.7.2.

8.2.3.Hardware Flow Control

Many programs disable the use of hardware data flow control signals. If this is the case, the RTS/CTS flow control must be disabled. To ensure that the NL6000￿s internal data buffers do not overflow, you may use the XON/XOFF flow control. Refer to section 5.7.2.

RF Neulink

43

NL6000 User Guide

Image 43
Contents NL6000 Wireless Modem Copyright Table of Contents RF Neulink NL6000 User Guide RF Neulink NL6000 User Guide Product Overview Use the NL6000 in a Simple ConfigurationFeatures Auto-Transmit Configuration TemplatesSingle and Multi- Point Addressing Acknowledgement406.0 to 406.1 MHz Operation Safety WarningRegulatory Information FCC PartGeneral Specifications SpecificationsReceiver UHF Radio SpecificationsCurrent Drain at 12 TransmitterVHF Radio Specifications Serial Port Hardware Installation and OperationPower Connections Parts DescriptionDCE DTELED Antenna ConnectionLEDs OperationPreparation Software ConfigurationTechnical Support PrerequisitesSource and Destination Addressing Unique Data Requirements for a Base StationAddressing with Wildcards Behavior of Repeater UnitsRepeat from a Base to a Remote Repeat to Multiple Remotes using Wildcard Packet Data Options Transmission ModeFEC CRCRF Neulink NL6000 User Guide Acknowledgements Over-the-Air Data RatesBasic Serial Parameters Carrier Sense Multiple AccessDCD Mode Serial Connection to an I/O DevicePlanning the RF Channel Factory Default ParametersPre- and Post-Data DCD Time Select Network ä Unit Type ProceduresGeneral Procedures Returning to the Previous Menu Displaying the Configuration Summary WindowSetting the Target Unit ID Toid Radio Network SetupSetting the Unit Type Select Network ä Unit Type Setting the Unit ID Myid Select Network ä MyidSerial Connection Setup Setting the Packet Mode Select Network ä Packet Mode Data SetupSetting the Max Retries Option Setting the Data Rate Select Network ä Data RateSetting the Request ACKs Option Setting the Contention Option Select Network ä ContentionTrigger ID Value Use Repeater SetupFile Management Downloading a Software UpgradeSaving Parameters to Disk Select Save/Restore Parameters ä Save Parameters to DiskRestoring Parameters from Disk Restoring Default Parameters Main Menu Summary Window Menu Quick ReferenceSerial Menu DCD RS-232 SubMenu Network Menu Repeater SubMenu Radio Menu Diagnostics Menu Save/Restore Parameters Menu Other Considerations TroubleshootingDuty Cycle Use a Faster Baud Rate Use a Fully-Wired RS-232 CableUnit Does Not Enter Programming Mode Use a Slower Baud RateSelect Diagnostics ä Transmit Continuous Random Data Appendix a Diagnosing and Correcting Performance ProblemsSetting the Frequency Trim includes setting Power Setting the Power Value∙ Select Radio Ä Transmit Frequency for Active Channel Setting the Deviation and Balance∙ Select Frequency Trim from the Diagnostics menu Select Diagnostics ä Transmit 100 Hz Square Wave∙ Select Diagnostics ä Receive Gain Setting the Receive Gain∙ Select Deviation from the Diagnostics menu ∙ Select Diagnostics ä Receive Diagnostic ModeCategory Parameter Default Value Custom Value Appendix B Factory Default ParametersFactory Default Values Index RF Neulink NL6000 User Guide