Status - Stanford Research Systems SR570 User Manual

Operation and Controls
FILTER RESET button while turning on the
power and the default settings will be restored.

Status

The INPUT and OUTPUT overload LEDs
indicate a signal overload. This condition can
occur when a signal is too large or the dynamic
reserve is too low. Reducing the sensitivity,
reducing the input signal and/or switching to the
HIGH BW setting should remedy this condition.
An INPUT overload indicates a voltage greater
than 7V is present before the filter section, while
an OUTPUT overload indicates an overload
after the filters.
The ACTIVE LED indicates communication activity
via the SR570's optoisolated RS-232 port. The
ERROR LED indicates that the SR570 has received
an unknown or improperly worded command. The
error LED will remain lit until a valid command is
issued. Please refer to the Remote Programming
section for further details on controlling the
instrument via RS-232.
The BLANK LED indicates that the optoisolated
BLANK input (on the rear panel of the SR570) is
active. The SR570 responds to a blanking input by
internally grounding the amplifier signal path after
the front end and before the first filter stage. The
TOGGLE LED indicates that the optoisolated
TOGGLE input (on the rear panel of the SR570) is
active. The SR570 responds to a toggle input by
toggling the polarity of the INVERT function.
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