Introduction; Power-On Configuration; Device Clear - Stanford Research Systems SIM983 Operation And Service Manual

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3.3 Introduction

3.3.1 Power-on configuration
3.3.2 Buffers

3.3.3 Device Clear

Remote operation of the SIM983 is through a simple command lan-
guage documented in this chapter. Both set and query forms of most
commands are supported, allowing the user complete control of the
amplifier from a remote computer, either through the SIM900 Main-
frame or directly via RS–232 (see Section 1.6.2.1).
See Table 1.1 for the specification of the DB–15 SIM Interface Con-
nector.
The initial settings for the remote interface are 9600 baud with no
parity and no flow control, and with local echo disabled (CONS OFF).
The values of the gain and the o set are retained in non-volatile
memory. Upon power-on, those settings are restored to their values
before the power was turned o . The bandwidth is set to the value
appropriate for the stored gain.
Where appropriate, the default or power-on value for parameters is
listed in boldface in the command descriptions.
The SIM983 stores incoming bytes from the host interface in a 64-
byte input bu er. Characters accumulate in the input bu er until
a command terminator (either CR or LF ) is received, at which
point the message is parsed and executed. Query responses from
the SIM983 are bu ered in a 64-byte output queue.
If the input bu er overflows, then all data in both the input bu er
and the output queue are discarded, and an error is recorded in the
CESR and ESR status registers.
The SIM983 host interface can be asynchronously reset to its power-
on configuration by sending an RS–232-style break 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 SIM983 is left unchanged; to reset the amplifier, use *RST.
The Device Clear signal will also terminate the output of the HELP?
command from the SIM983.
Remote Operation
SIM983 Scaling Amplifier