AMT-70/AMT-73/AMT-75 Installation and Operation
CHAPTER 6 THE MODEM COMMAND SET
6.1 Introduction
This chapter describes the AMT-70 remote control, simplified user interface, set-up menu operation,
transmit control commands, receive control commands and monitor commands for both transmit and
receive.
6.1.1 The Command Syntax
The command syntax for the AMT-70 modems is as follows;
<command> [parms]
The <command> field specifies the command name for the specific card. Typically, all command
names for the demodulator are prefixed with “r”, all command for the modulator by “t” and for the
interface control “i”.
If only the command name is specified it means most of the time that it’s a query request. If the
command name is followed by the parm “??” it means it’s a help request.
The [parms] field is specific to each command. Typically one parameter is specified for the requests.
The figure below shows some example of the commands;
Figure 37: AMT70 command syntax
6.1.2 The Modulator/Demodulator Standard Commands
The figure below shows the command set that is common to the modulator and the demodulator.
Figure 38: AMT-70 Standard (L-Band or 70 MHz) Configurations
PARAMETER
MODULATOR
COMMAND
DEMODULATOR
COMMAND
REMARKS
Command Setting
tunits
BPS or SPS
runits
BPS or SPS
Get/Set the units for the data rate. When the
data interface card is fitted on the modem
only the BPS unit can be used. If the card is
not installed and ASI input is used BPS or
SPS units can be specified.
Frequency (L-Band)
tcarrier xxxxxxxxxx rcarrier xxxxxxxxxx
Get/Set RF output or input frequency in Hz.
Frequency (70
MHz) (Optional)
tcarrier xxxxxxxx rcarrier xxxxxxxx
Get/Set IF output or input frequency in Hz
96
Examples
RBER Query the demodulator BER rate
TMOD 16QAM Set the modulator order to 16QAM
TRATE 2/3 Set to code rate to 2/3
RDATA ?? Get the help information for the command.
To Next Page
Loading...
General