Svantek SVAN 977A - 8.7. Setting parameters of the I;O port - Multifunction I;O

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SVAN 977A User Manual
<Start/Stop> key mode
In the Start/Stop position, you can choose between Direct and With Shift.
When the Direct option is selected, the instrument reacts on each of the
<Start/Stop> keystroke, starting or stopping the measurement.
When the With Shift option is selected the <Start/Stop> key will operate with
the <Shift> key pressed simultaneously or in sequence. The measurements
are started or stopped after pressing both keys.
8.7. SETTING PARAMETERS OF THE I/O PORT - MULTIFUNCTION I/O
The Multifunction I/O position allows to
select the available functionality of the I/O port
(3.5 mm jack socket).
<ENT>
The I/O jack socket can be used as (I/O Mode):
• output of the analogue signal (Analog Out) transmitted from the input of the
instrument to its output without any digital processing (i.e. frequency filtering,
etc.),
• input of the digital signal (Digital In) used as an external trigger to start the
measurements. The instrument is acting in this case as so called “slave
instrument”,
• output of the digital signal (Digital Out) used for triggering other “slave
instrument(s)” (the instrument is acting in this case as a “master
instrument”), or as a source of any alarm signal in case of certain
circumstances occurred during measurements (i.e. the level of the input
signal is higher than the user selected trigger alarm threshold).
More detailed description of the I/O port is given in Appendix C.
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Note: If the RPM function is enabled (path: <Menu> / Measurement /
RPM Measurement) the Multifunction I/O is set automatically to
Digital In mode with the Ext.Trigger function.
Digital In mode (External trigger function)
In the Digital In mode, the signal appeared on the I/O socket will be treated as
the external trigger if the External trigger was chosen (path: <Menu> /
Measurement / Measurement Trigger / Trigger: External or <Menu> /
Measurement / Logging / Trigger: External). In the Digital In mode the
Function parameter is set to Ext.Trigger. It is possible to select the trigger
voltage slope: [+] (uprising as default) or [–] (falling).