3.4
Commands
3 – 7
If the input bu
ff
er overflows, then all data in
both
the input bu
ff
er
and the output queue are discarded, and an error is recorded in the
CESR and ESR status registers.
3.3.3
Device Clear
The SIM918 host interface can be asynchronously reset to its power-
on configuration by sending an RS–232-style
h
break
i
signal. From the
SIM900 Mainframe, this is accomplished with the
SRST
command;
if directly interfacing via RS–232, then use a serial break signal. After
receiving the Device Clear, the
CONS
mode is turned
OFF
. Note that
this
only
resets the communication interface; the basic function of
the SIM918 is left unchanged; to reset the preamplifier, use
*RST
.
The Device Clear signal will also terminate the output of the
HELP?
command from the SIM918.
3.4
Commands
This section provides syntax and operational descriptions for remote
commands.
3.4.1
Command syntax
The four letter mnemonic (shown in
CAPS
) in each command se-
quence specifies the command. The rest of the sequence consists of
parameters.
Commands may take either
set
or
query
form, depending on whether
the “
?
” character follows the mnemonic.
Set only
commands are
listed without the “
?
”,
query only
commands show the “
?
” after the
mnemonic, and
optionally query
commands are marked with a “
(?)
”.
Parameters shown in
{ }
and [ ] are not always required. Parameters
in
{ }
are required to set a value, and should be omitted for queries.
Parameters in [ ] are optional in both set and query commands. Pa-
rameters listed without surrounding characters are always required.
Do
not
send ( ) or
{ }
or [ ] as part of the command.
Multiple parameters are separated by commas. Multiple commands
may be sent on one command line by separating them with semi-
colons (;) so long as the input bu
ff
er does not overflow. Commands
are terminated by either
h
CR
i
or
h
LF
i
characters. Null commands
and whitespaces are ignored. Execution of the command does not
begin until the command terminator is received.
Token
parameters (generically shown as
y
and
z
in the command
tokens
descriptions) can be specified either as a keyword or as an integer
SIM918
Precision Current Preamplifier
Summary of Contents for SIM918
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