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Company Confidential

 

32

 

Raveon Technologies Corp. 

Solution #2

. 

 Handshaking.  You may have hardware handshaking enabled on your 

terminal program, but the hardware or cable may not support it.  Disable hardware 
handshaking on your terminal program to verify this is the issue.    

Symptom:  Modem appears dead. 

Solution #1

. 

 Verify the power is on.  When the modem has good DC power, the PWR 

LED will blink once per second.  If it is not blinking, either the modem does not have power, 
the modem is broken, or the LEDs have been disabled via the ATJS2 command.   

Summary of Contents for FireLine Ethernet

Page 1: ...FireLine Data Radio Modem Technical Manual Version B7 November 2005 Raveon Technologies Corporation 2722 Loker Avenue West Suite D Carlsbad CA 92010 www raveontech com ...

Page 2: ... User Serial Port Commands 16 Overview 16 Command Mode 16 Setting a Parameter 16 Reading a Parameter 17 CONFIG Button 17 Command Mode Commands 18 Default Frequencies 20 Channel 5 451 800000 Itinerant Business Debug Related Commands 21 Debug Related Commands 21 Tune up and Alignment 22 Center Frequency 22 TX Deviation 22 TX Modulation Balance 23 RX DC Offset Verification 23 RX Carrier Detect 23 Sky...

Page 3: ...ders are within 2 feet 6 meters of the antenna Safety Training information Antennas used for this transmitter must not exceed an antenna gain of 0 dBd The radio modem must be used in fixed vehicle mount configurations or at fixed base station sites It is not intended for portable applications Failure to observe these restrictions may result in exceeding the FCC RF exposure limits Antenna Installat...

Page 4: ...ce and 2 this device must accept any interference received including interference that may cause undesired operation Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment NOTE The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment Such modi...

Page 5: ...uded aluminum enclosure 16 bit addressing for up to 65 525 different unique device addresses per channel 2 watts of RF output Other RF power levels available upon request Operating temperature range of 30 to 60 degrees C Easily configured using AT commands User interface is asynchronous serial data for TX RX and configuration RS 232 serial input and output Programmable baud rates up to 57600 Progr...

Page 6: ... RX and RX TX turn around time 10mS Power on time to operational 200mS Transmitter Maximum RF power output 2 0 watts Maximum duty cycle 10 at full power Maximum transmit frequency deviation 2 25kHz Occupied bandwidth 11 kHz TX spurious outputs 70dBc Receiver Typical RX sensitivity 1 BER 9600bps 107dBm 4800bps 110dBm 2400bps 114dBm 800bps 118dBm RX selectivity 50dB Spurious and image rejection 60dB...

Page 7: ...y signal even one from other sources or radios data or voice If it glows steadily at all times there is probably some other user on the radio channel Power LED PWR This has a short blink once every two seconds indicating to the user that the power to the modem is ON and the modem is working When the modem is in the command mode this LED will blink on and off once per second In the normal operating...

Page 8: ...ection Signal and power ground 6 DSR out Data Set Ready Normally is set to 0 when modem is powered on 7 RTS in Request to send Used to stop start the flow of data coming out of the modem TxD pin 0 OK to send 1 don t send 8 CTS out Clear to send Used to stop the flow of data coming into the RxD pin from the device connected to the FireLine 0 OK to send 1 don t send 9 Power In out DC power not Ring ...

Page 9: ...adio is now ready to use Any serial data going into the modem will be transmitted over the air and any data received over the air will be sent out the serial port Addressing One of the more powerful aspects of the FireLine modem is its addressing scheme Each FireLine contains a 16 bit address called its Unit Address and is represented as a 4 digit hexadecimal number FireLine address may be any num...

Page 10: ...s will you want to change the address mask Whenever data is received over the air the Unit Address of the device that sent the data is logically ANDed with the Address Mask in the receiving modem This is the Effective Transmission Address The receiving FireLine also ANDs its own Unit Address with its Address Mask The result is the effective Unit Address The Effective Unit Address is compared to th...

Page 11: ... will be received because the address do not match and the address mask of FFFF requires that all digits in the address match Example 3 able to receive a data from a group 1230 123F Sending Unit Address 1236 Receiving Unit Address 1234 Receiving Unit s Address Mask FFF0 Result Data will be received 1236 ANDed with FFF0 is 1230 1234 ANDed with FFF0 is 1230 The results of the ANDing match and thus t...

Page 12: ...ted by the Federal Communications Commission FCC In order to transmit on these frequencies you are required to have a license issued by the FCC Almost everyone engaged in public safety activities as well as private organizations are required to obtain a radio station license from the Federal Communications Commission if they wish to use a radio transmitter The FCC will help you through the licensi...

Page 13: ... FCC to help you through the process and who in most cases will handle the actual filing of your application With few exceptions you must apply for an FCC license through a Frequency Coordinator They are located throughout the country making it easy for you to find one that is familiar with radio operations in your area ...

Page 14: ...Ready asserted by the modem RTS On this line the DTE will send a signal when it wants to receive data from the FireLine modem The FireLine modem will not output data unless this pin is low or Flow Control has been disabled in the modem set up When a DTE such as a PC or microcontroller wants to stop the flow into it it negates RTS Negated Request To Send digital 1 means request NOT to send to me st...

Page 15: ...e operation of this line is configured with the ATR1 command The default is 1 asserts when FireLine data is detected on the radio receiver DTR This line is an input to the FireLine It is normally ignored because the default configuration of the FireLine modem is to ignore this signal If the DTR line is enabled for use using the ATK5 1 command the DTR input line can be used to put the FireLine mode...

Page 16: ...pause is missing the modem will not enter the command mode Using serial communications software such as HypterTerminal send the 3 character command sequence while observing times of silence before BT Silence Before Sequence Command and after AT Silence After Sequence Command the command characters The default sequence for entering into AT Command Mode The default sequence for entering into AT Comm...

Page 17: ...or if the user cannot enter the command mode via the method described above there is a small push button internal to the FireLine modem to assist This CONFIG button may be pressed at any time and forces the modem into a know operational state The CONFIG button is located inside the modem Remove the rear cover exposing the two circuit boards The button is in the center of the lower circuit board as...

Page 18: ...ems with the same address can communicate with each other Note this parameter is entered in HEX format Each digit may be a 0 1 2 3 4 5 6 7 8 9 A B C D E or F Range 0 FFFF 1234 E0 E1 Echo Set Echo on E1 or off E0 Range 0 1 0 F Display frequencies Display all of the frequencies programmed into all of the channel memories N A FT Transmit Frequency Program the transmit frequency for this channel Enter...

Page 19: ...Note This can be a negative number to invert the modulation Range 0 1000 100 R1 Select CD pin output signal CD may be RF carrier detect or modem data detect Range 0 1 2 Always assert CD 1 Data CD 0 RF CD 1 R2 Over the air bit rate This is the data rate the radio uses to send data over the air All RF modems in the network must use the same over the air baud rate Range 0 800 4 9600 4L 1 1200 5 9600 ...

Page 20: ... 2 Hop up dn one channel 3 Force PLL to fast 4 TX all 0s 5 TX all 1s 6 Test Points ON 7 Transmit CW 8 Transmit 1010101 TM Serial Port time out Number of uS of no activity before transmitting Range 0 5000000 20000 TT Max Packet Size Set the maximum number of bytes in an over the air packet 1 512 240 VR Firmware Version Returns firmware version currently loaded on the module Read Only 3 characters n...

Page 21: ... PLL to fast lock mode 4 Transmit all 0s 5 Transmit all 1s 6 Enable the test points on the PCB 7 Transmit CW on center of channel SHOW Display an overview of the configuration STAT Display statistics of how the modem is working AT 5 Display RSSI It will scroll the reading until another character comes in the serial port Packet Counter ATPE 0 Reset the packet counters back to zero ATPE 1 Begin coun...

Page 22: ...alue and it is easy to unintentionally modify the wrong register Typical Register Settings R Register R0 R5 R8 R9 Function Peak Deviation Preamble Length Frequency Offset Modulation Balance Radio Type 2 DM3473 Module 100 5 0 20 Radio Type 3 DM3475 Module 120 5 0 20 Center Frequency 1 Set the VCO balance setting to its nominal value Use this command ATR9 20 2 Key the transmitter with CW output usin...

Page 23: ...rate a test signal 1kHz tone 1 5kHz deviation on the receive frequency Connect the signal generator to the antenna input Set the RF level to 90dBm 2 Measure the average voltage at TPRX1 on the modem circuit board 3 The DC voltage should be between 1 0 and 2 0 volts and the p p voltage of the sine wave should be greater than 50mV and less than 2 volts RX Carrier Detect The DCD signal from the modem...

Page 24: ...tting you would like the CD signal to trip at The BUSY LED will also indicate an RF carrier when the RF carrier is above the threshold set with the ATRA command 5 Generate an RF signal on channel with a level of 115dBm Verify the Power BUSY LED stays on If it does not repeat step 4 adjusting in increments of 10 ...

Page 25: ...mmand to set the FireLine to 9600 baud over the air is ATR2 5 ATR5 6 This command tells the FireLine modem to send 6 bytes of pre amble before every transmission MYID 1234 The MYID of the FireLine modem is set with the ATDT command or the MYID command The default MYID of the SkyLine was 1234 TOID FFFF The TOID of the FireLine modem is set with the ATMK command or the TOID command The default TOID ...

Page 26: ... Certain features of the SkyLine modem are not currently implemented in the FireLine modem They are Repeater Function No store and forward repeating is implemented Retransmission If the SkyLine user enabled the ACKS the FireLine will not send the ACK ...

Page 27: ...plications you may utilize an antenna with gain Note The maximum Permissible Exposure MPE for this product was computed using a 0dB gain antenna and must be recalculated if a gain antenna is used Height Try to locate the antenna as high above obstructions vehicle and buildings as possible UHF radio channels require a clear line of sight between the transmitter and the receiver Radio waves will pen...

Page 28: ...o ON 5 0V DC to radio Digital output 10mA maximum current source 6 Transmit modulation 2 5V DC RX 2 5V DC with 2V p p Gaussian filtered 9600bps data during transmit 7 Synthesizer lock detect input Low unlocked High locked 8 PLL enable signal Latch enable signal for serial interface to PLL 9 PLL data signal Data to PLL chip via three wire interface pins 8 9 and 10 10 PLL clock for three wire interf...

Page 29: ...a problem if either of the two devices checks the DSR or CD inputs These signals normally define the ability of the other side to communicate As they are not connected their signal level will never go high This might cause a problem The same holds for the RTS CTS handshaking sequence If the software on both sides is well structured the RTS output is set high and then a waiting cycle is started unt...

Page 30: ...tion of the RTS and CTS pins Originally these pins are used for a question answer type of flow control When the full handshaking null modem cable is used there is no request anymore The lines are purely used for telling the other side if communication is possible The main advantage of this cable is that there are two signaling lines in each direction Both the RTS and DTR outputs can be used to sen...

Page 31: ...that serial port timeout is OK The ATG0 command sets the number of microseconds that the FireLine will look for in the serial input data stream If a pause greater than this value happens the modem will transmit If the ATG0 paramter is set very large say 2000000 this means 2 seconds and the modem may simply be waiting a long time Symptom Long delay before transmitting Solution 1 Verify that serial ...

Page 32: ... may not support it Disable hardware handshaking on your terminal program to verify this is the issue Symptom Modem appears dead Solution 1 Verify the power is on When the modem has good DC power the PWR LED will blink once per second If it is not blinking either the modem does not have power the modem is broken or the LEDs have been disabled via the ATJS2 command ...

Page 33: ...Company Confidential 33 Raveon Technologies Corp Mechanical ...

Page 34: ...LUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU THIS WARRANTY IS IN LIEU OF ALL OTHER EXPRESS OR IMPLIED WARRANTIES ALL IMPLIED WARRANTIES INCLUDING THE WARRANTY OF MERCHANTABILITY AND THE WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY MODIFIED TO EXIST ONLY AS CONTAINED IN THIS LIMITED WARRANTY AND SHALL BE OF THE SAME...

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