Teledyne LeCroy PETracer EML Analyzer and Exerciser User Manual - Manual (Page 33)

PETracer EML User Manual Chapter 2: Hardware Description
LeCroy Corporation
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Breakout Board Input and Output Signals
A Breakout Board can be used to channel input signals into the Analyzer in order to cause
triggering. A Breakout Board can also be used to channel signals from the Analyzer to an
external source.
Drive strength for all outputs is about 30 mA high (@2 V) and 60 mA low (@0.5 V). Inputs
can handle 0 V to 5.5 V. Inputs above 2 V are detected as logic high; inputs below 0.8 V
are detected as logic low.
The Breakout Board connects via a cable to the Data In/Out connector on the rear of the
UPAS.
External Recordable Signals
Breakout Board Data 0-3: These pins let you define a 4-bit Data Pattern that can be
recorded in a CATC Trace file.
External Input Triggers
You can use either an external input signal or the Trigger button on the front of the UPAS
to cause triggering. The following descriptions show what pins or buttons to use:
Breakout Board Data 3 - Data 0: Triggers on a 4-bit input pattern.
Breakout Board Trigger In 0: Selectable Edge triggered inputs. Triggers on any edge it
detects.
Breakout Board Trigger In 1: Selectable Edge triggered inputs. Triggers on any edge it
detects.
BNC Trigger (EXT IN): Selectable Edge triggered inputs. Triggers on any edge it detects.
Located on the back of the chassis.
Push Button Trigger: The Trigger button on the front of the UPAS can be pressed to
manually cause a trigger.
External Outputs
The Analyzer can be configured to send an external signal anytime a trigger and/or event
occurs. The following descriptions show the behavior of these output signals:
Breakout Board Trigger Out: Changes from low to high when Analyzer triggers
(one time per recording only)
Breakout Board G.P. Output: Programmable waveform (low or high pulse, toggle). Each
event can be programmed to enable this external signal.
BNC Output (EXT OUT): Same as Breakout Board G.P. Output. Located on the back of
the chassis.
Setting Recording Options to Support External Input/Output
Signaling
After a Breakout Board has been connected to a UPAS, the Analyzer must be configured
for external or internal input signaling.