The Modem Command Set; Introduction; The Command Syntax; The Modulator/Demodulator Standard Commands - Advantech AMT-73 Installation And Operation Manual

CHAPTER 6

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.

The Command Syntax

6.1.1
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;
Examples
RBER
TMOD 16QAM
TRATE 2/3
RDATA ??

The Modulator/Demodulator Standard Commands

6.1.2
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
Command Setting
Frequency (L-Band)
Frequency (70
MHz) (Optional)
AMT-70/AMT-73/AMT-75 Installation and Operation

THE MODEM COMMAND SET

Figure 37: AMT70 command syntax

Query the demodulator BER rate
Set the modulator order to 16QAM
Set to code rate to 2/3
Get the help information for the command.
MODULATOR DEMODULATOR
COMMAND
tunits runits
BPS or SPS BPS or SPS
tcarrier xxxxxxxxxx rcarrier xxxxxxxxxx
tcarrier xxxxxxxx rcarrier xxxxxxxx
COMMAND
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.
Get/Set RF output or input frequency in Hz.
Get/Set IF output or input frequency in Hz
REMARKS
96