Specifications

Company Confidential 46 Raveon Technologies Corp.
10. Tune-up and Alignment
Do not key the transmitter for more than 30 seconds
out of every 300 seconds. The transmitter is rated at
10% duty cycle maximum.
Radio calibration and alignment is performed using the ATRx commands. The
FireLine modem has been factory calibrated, in should not require any re-
calibration when installed, or when changing frequency or channel. Unless the
user is trained in radio test and calibration, the values stored in the R registers
should not be modified.
Improper adjustment of the radio calibration (R0-R9 and RA registers), can
result in failure of the radio modem.
Calibration and alignment values are stored internal to the modem in the “R”
registers. (R0-R9 and RA). For example, to read R5, issue the ATR8 command
without any parameter. To change the setting, issue the ATR8 nn command,
where nn is the new value you would like to store.
Once you read a register using an ATRx command, you may modify its value by
entering a “U” for up or a “D” for down. U or D will change the value by one. Use
this trick carefully, because it modifies the last R register that was read, and it is
easy to unintentionally modify the wrong register.
10.1. Periodic Calibration
The only setting that may require adjustment is the center frequency. After years
of operation, all crystals will age and change frequency slightly. The ATR8
command is used to adjust the center frequency. Like all narrow-band radios,
semi-annual checks and adjustment of frequency is recommended.
10.2. Radio Module Types
The following table lists the parameters in the modem that are calibrated at the
factory. Calibration values are stored in registers R0 – R9. The FireLine radio
modem has the capability of incorporating a variety of different radios modules.
Each different radio model is considered a different “radio type”. The radio type
is read and set with the ATRT command.
Typical Register Settings for Various Radio Modules
R Register FireLine Model R0 R5 R8 R9
Function Peak
Deviation
Preamble
Length
Frequency
Offset
Modulation
Balance
Radio Type 2
(DM3473 Module)
RV-M5-Ux-N2
RV-M5-Ux-W2
100 5 0 20
Radio Type 3
(DM3475 Module)
120 5 0 20
Radio Type 5
(DM3472 Module)
RV-M5-Ux-S2 175 9 50 NA