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Hermes Operator Note Page 14 of 32
4.6 Engineering Test Modes (AT In)
Format modes:
To enable the function AT In=1 <CR><LF>
To disable the function AT In=0 <CR><LF>
Modem responds with OK <CR><LF>
Read status: AT In?<CR><LF>
Modem responds with m <CR><LF> where m=0, not active
m=1, active
Where n = 2 Output Continuous Preamble (used for
checking transmitter and receiver). The
preamble is transmitted until stopped by the
ATI2=0 or AT I=10 commands, or ending the
command mode. Note: for a G-Max, this test
must not be run for >10 minutes as damage to
the transceiver may occur.
n = 3 Output a series of 49 byte long data packets
with a programmed period between each
packet set with register S162. The message
data sent is: “The quick brown fox jumps over
the lazy dog.<CR><LF>” Each line of data is
pre-ceded by “XX “ where XX is a line number
which increments from 00 - 99.
The data is transmitted until stopped by the
ATI3=0 or AT I=10 commands, or ending
command mode.
n = 4 Adds the Output Data quality and Signal level
data to the end of each received data packet.
This is ended by the ATI4=0 or AT I=10
command. The data format is:
R:XX, D:XXX<CR><LF>
where XX = 1 - 10 and XXX = 66 - 256 as
defined in paragraphs 5.10 and 5.12
Note: if data is received before the values have
been read then R:XX, D:XXX<CR><LF> will be
output.
n = 9 Gives information about the software version
(refer to paragraph 5.7).
n = 10 Turn off test modes