BNC 6040 - Manual (Page 29)

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OPERATING INFORMATION
{TRIG}
Sequences through the trigger source and parameter menu. This is used in the
Pulse and Impulse Modes.
The selections are Internal Trigger, External Trigger (threshold and slope).
External Drive, and Single Cycle. With no plug-in module, this is set to Single
Cycle at power-on.
Internal Trigger selects the internal rep-rate generator as the source of triggers
for timing cycles and allows the user to set this rate.
External Trigger selects the front panel TRIG IN connector as the source of
triggers for liming cycles and allows the setting of the discriminator threshold.
External Trigger Slope selects which edge of a TRIG IN pulse will initiate a
timing cycle. This setting is toggled using the {+/-, SGL/DBL} key.
External Drive switches the source of the digital drive from the internal DRIVE
waveform (coincident with the mainframe's front panel PULSE OUT) to the
module's EXTERNAL DRIVE coaxial connector. This also allows the setting of
the module external drive discriminator threshold. In External Drive operation, the
module output goes to the Peak level when the External Drive input is above the
threshold voltage and returns to the Baseline level when the input is below the
threshold. Timing menu settings are ignored and mainframe TRIG OUT, PULSE
OUT and ECL OUT jacks are disabled. External Drive is only available with
certain plug-in modules.
Single Cycle causes a timing cycle to be generated once every time the EXEC
or ENTER key is pressed.
Front Panel Display:
<Trg Int: x.xxx *Hz>
<Trg Ext: x.xx *V>
<Trigger Slope: +> or <Trigger Slope:- >
<Single Cycle>
<Ext Drv: x.xx *V>
{TIMING}
Sequences through the pulse timing parameter menu. This is used in the Pulse
and Impulse Modes (but has no effect on External Drive operation). The
selections are Delay, Width, and Single/Double Pulse. These are not plug-in
module dependent.