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Company Confidential

Raveon Technologies Corp.

OSERR

The number of Operatin System Errors. Normally this is 0.

PRX

The number of packets this modem has received.

PTX

The number of packets this modem has transmitted.

The ID code that the status information is sent to, is set with the

ATMA xxxx

command.

Whenever a status transmission is sent, the “TO ID” of the transmission is the address set using
the

ATMA

command. This allows the system to be configured in a way the normal modem

communications take place between the modems, and the status information only is delivered to
modems that need to receive it.

Содержание RV-M3-M

Страница 1: ...Model RV M3 M MURS Radio Modem Module Version D4 November 2006 Raveon Technologies Corporation 2780 La Mirada Dr Suite C Vista CA 92081 www raveontech com...

Страница 2: ...microprocessor The user interface to it is ASYNC data in and out Modem operation is transparent to the user although the configuration of the modem is via the user serial port This Radio Modem is ver...

Страница 3: ...CRC checking of the data No bad data and no dribble bytes will come out 1 2 watts of RF output May be programmed to 100mW for lower power applications Full spec 30 to 60 degrees C Easily configured us...

Страница 4: ...o 60 C Storage temperature range 30 C to 70 C TX RX and RX TX turn around time 50mS Power on time to operational 500mS Sleep to ON time 60mS 4 2 Transmitter RF Power output 5V DC in 0 5 watts 27dBm RF...

Страница 5: ...ce of carrier 0 means carrier is present If disabled it is asserted 0 whenever the modem is operational and not in the configuration mode It will be a 1 when the modem is in the configuration mode 11...

Страница 6: ...transmit data from the DCE to the DTE The modem will start to transmit data to the DTE when a logical 1 is present on all of the following lines Data Terminal Ready reply that it is OK to send Data S...

Страница 7: ...fig mode when using AT Commands Using serial communications software send the 3 character command sequence while observing times of silence before BT Silence Before Sequence Command and after AT Silen...

Страница 8: ...ed the modem will ignore the state of RTS and always send out characters 1 Enable 0 Disable 0 CN or O Exit AT Command Mode Exits module from AT Command Mode and returns it to Idle Mode Parameters are...

Страница 9: ...8 9 A B C D E or F Note FF is interpreted as a group See addressing section Range 0000 FFFF 1234 NB Parity Selects parity format Settings 0 4 transfer 8 bits over antenna port and generate the parity...

Страница 10: ...ASCII characters showing the main configuration parameters none None SV Save Save all the parameters to EEPROM This command must be used if changed parameters are to be stored in non volatile memory a...

Страница 11: ...ll 0s 5 Transmit all 1s 6 Enable the test points on the PCB 7 Transmit CW on center of channel 8 Transmit alternating 1s and 0s SHOW Display an overview of the configuration STAT Display statistics of...

Страница 12: ...tify data packets 4 No Dribble Data Even in the presence of noise the modem will not output extra data or have random bit errors Modems without packet operation generally do not work well with weak no...

Страница 13: ...terminal or PC computer running HyperTerminal through a CMOS to serial adapter to the modem connector The factory default serial ports settings are 9600 bps 8 data bits 1 stop no parity 4 Program the...

Страница 14: ...requencies The modem has memory for up to 6 channels A channel is a pair of frequencies one for transmit and one for receive They may be different or they may be the same You may program any valid fre...

Страница 15: ...l utilization is only about 50 But if the serial port baud rate is set much higher say 2 8X the over the air rate the channel utilization becomes near 100 Because the modem can handle serial port data...

Страница 16: ...rt Again the serial port may be set to any baud rate the user wishes and the radio receiver and transmitter will continue to operate independently of the baud rate When the modem receives a signal it...

Страница 17: ...ort If it does not match the receiving modem discards the data and does not send it out the serial port 9 10 3 Setting A System Wide Address If individual addressing is not needed in your system there...

Страница 18: ...there is an Address Mask programmed into it The default mask is FFFF The address mask is also used to determine if a particular data transmission should be received by the modem For most applications...

Страница 19: ...ation All units have address 1234 and all modems will talk to all other modems with address 1234 Example 2 a configuration that won t work Sending to Destination Address 1236 Receiving Unit Address 12...

Страница 20: ...get the data due to interference the receiving modem does not send the ACK back and the sending station will automatically re send the data There are two aspects to configuring ARQ 1 Enable the ARQ mo...

Страница 21: ...mmand To disable ARQ the default condition of the modem disable ARQ with the ATAK 0 and set retries to zero with the ATRB 0 command 10 Using the Radio Modem Streaming Mode This section describes the o...

Страница 22: ...dem it will automatically de key the radio and go back into the receive mode The modem will send a hidden end of message signal to the receiving modem thus avoiding any extra data bytes dribble bytes...

Страница 23: ...noise bytes 10 4 Carrier Detect To reduce and virtually eliminate bit errors and additional noise bytes the user may configure the Radio Modem to require an RF carrier Detect before receiving any dat...

Страница 24: ...The modem will now put out CW on the center of the channel 5 Read the frequency offset with the ATR8 command 6 Adjust the frequency to the center of the channel with the ATR8 command You can use the...

Страница 25: ...dem into the Command Mode To see a general overview of how the modem has been operating us the STAT command status request command without any parameter The radio modem will respond with a list of cer...

Страница 26: ...Company Confidential 26 Raveon Technologies Corp STAT 4 Run Time Returns the amount of time that the modem has been powered up and running Run time display screen...

Страница 27: ...essages ever appear 12 5 STAT 2 Command The ATST2 command will return additional lower level statistics RF FIFO overruns nnn number of times the modem was too busy to receive data over the air Wrong a...

Страница 28: ...e use the ATAS xxx command where xxx is the status interval in minutes The interval may be between 1minute an 65000 minutes 45 days The general format of the message that the modem will send is an ASC...

Страница 29: ...s transmitted The ID code that the status information is sent to is set with the ATMA xxxx command Whenever a status transmission is sent the TO ID of the transmission is the address set using the ATM...

Страница 30: ...Company Confidential 30 Raveon Technologies Corp 13 Mechanical...

Страница 31: ...te or PCB with 625 inch stand offs and before securing it to the standoffs plg a ribbon connector into the I O connector This configuration is shown in the Board toCable Interface illustration below A...

Страница 32: ...EXCLUSION 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...

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