© Microhard Systems Inc.
Confidential
78
Appendix A: AT Command Quick Reference
A
Answer
-this command puts the modem into online/data mode
g, G
Spectrum Analyzer
Used to help determine if interfering RF signals are present.
I
n
Identification
-follow ATI with either of the following ‘
n
’:
1-product code
3-firmware version
4-firmware date
5-firmware copyright
6-firmware time
7-Serial Number
255-factory-configured options listing
N
Advanced Spectrum Analyzer
Advanced spectrum analyzer provides for a more detailed scru-
tiny of the RF environment.
&F
n
Load Factory Default Configuration
Frequency Hopping Modems
&F1 - FH Master Fast PMP
&F2 - FH Slave Fast PMP
&F3 - FH Repeater Fast PMP
&F4 - FH Master Slow PMP
&F5 - FH Slave Slow PMP
&F6 - FH Master Fast PP
&F7 - FH Slave Fast PP
&F8 - FH Master Slow PP
&F9 - FH Slave Slow PP
&F10 - FH Master Fast PMP no Time ACK
&F11 - FH Master Fast P2P no Time ACK
&F12 - FH Master Fast PP no Time ACK
&F15 - FH Master WL
&F16 - FH Slave WL
&F18 - FH Master Fast TDMA
&F19 - FH Slave Fast TDMA
&F100 - Reset Hopping Modes
&C
n
DCD (Data Carrier Detect)
-controls modem’s DCD output signal
0-DCD always on
1-DCD on when modem’s sync’ed, always on if Master*
&D
n
DTR (Data Terminal Ready)
-controls the action the modem performs when the DTR input line
is toggled
-follow ATD with either of the following ‘
n
’:
0-*DTR line ignored
2-deassert DTR to force modem from data mode into command
mode at S102 serial baud rate; DTR must be asserted before
putting modem back into data mode (normally done using ‘ATA’
command)
&K
n
Handshaking
-determines handshaking between modem and host device
0-disable handshaking
3-enable hardware (RTS/CTS) handshaking*
&S
n
DSR (Data Set Ready)
-controls modem’s DSR line and determines when it is active
0-DSR always on
1-*DSR ON in data mode, OFF in command mode
AT&V
View Configuration
-displays all visible S registers and their current values
&W
Write Configuration to Memory
-stores active configuration into modem’s non-volatile memory
S
xxx
?
Read S Register Value
-where xxx is the S register’s number, this command will result in
displaying the current setting of that register
S
xxx
=
yyy
Set S Register Value
-where xxx is the S register’s number, this command will place
value yyy in that register
S
xxx
/?
Display S Register Help Text
-where xxx is the S register’s number, this command will result in
displaying the available settings of that register. Not all registers
have help text.
The following commands may be used when the modem is in COMMAND MODE; all are to be preceded with
“AT” and followed with [Enter]. An asterisk (*) indicates a default setting, where applicable.
