User's Manual

Atlas PT Technical Manual

When you program your own security code into your ATLAS PT transponders, write it

down in a secure place. This parameter cannot be read out of the Atlas SM. If you

forget what it is set to, you will have to reset all the security codes in all of your ATLAS

PT Transponders.

Use the KEYPHRASE command to set the key phrase. For example, to set the key

phrase to Jkl53hhp type:

KEYPHRASE Jkl53hhp <enter>

ID Addressing Basics

ID addressing is used to differentiate one RV-M7 Transponder from another. Each

must have a unique number programmed into them, so that when a position report is

received, the ATLAS PT that sent the message can be identified. This is called the

MYID of the unit that sent the message.

Each ATLAS PT has a MYID programmed into it, and is represented as a 4 digit

decimal number. ATLAS PT IDs may be any number between 0001 and 9999. The

Unit Address is programmed with the MYID xxxx command, and the ID of the

destination modem it sends its messages to (the Destination Address) is configured with

the ATDT xxxx command.

The factory default MYID in all ATLAS PT modem is 0001, and 0001 is also the default

for the Destination ID also. The ID of your particular ATLAS PT may have been

configured by your dealer or distributor. If so, it is labeled on the rear of the unit. If it is

not labeled with an ID, the factory default ID is in it.

The default Address Mask is F000, which means the ATLAS PT will receive a

transmission from any other RV-M7 as long as the first digit matches, in this case, is a

Make sure you set the MYID of each ATLAS PT in your system to a different number.

For example, to set the ID of your ATLAS PT to 17, enter:

MYID 17 <enter>

To set your RV-M7 to send its position and status data to RV-M7 number 1, enter:

ATDT 1 <enter>

To set your address mask to receive all messages from units with IDs 1-999, and

exclude 1000-9999, enter

ATMK F000 <enter>

Time Slots

The ATLAS PT uses a transmission scheme popular in mobile-telephones called TDMA

(Time Division Multiple Access). Each ATLAS PT is allocated a time-slot to use for

sending and receiving radio messages.

Refer to the Raveon website for detailed explanation of the TDMA scheme. The

important point to understand is that for optimum efficiency in an ATLAS PT system,