The Trigger-Level Screen; Threshold And Impedance Parameters - HP 81101A Quick Start Manual

The Trigger-Level Screen

Use the Trigger-Level screen to
• set the triggering threshold and input impedance for the EXT INPUT
connector,
• set the triggering threshold and input impedance for the
CLOCK/REF INP. connector,
• set the output levels for the STROBE OUT and TRIGGER OUT
connectors.
To access the Trigger-Level screen, press the TRG-LEV softkey.
EXT-IN: Threshold
CLK-IN: Threshold
TRIGGER-OUT: TTL
STROBE-OUT : TTL
MODE/TRG

Threshold and Impedance Parameters

You can individually specify threshold and input impedance of the EXT-
IN and the CLK-IN connectors.
EXT-IN and CLK-IN Threshold Parameters
Move the entry focus to EXT-IN or CLK-IN to quickly set the triggering
threshold of the external input or the clock input to a TTL- or ECL-
compatible level:
+1.0V 50Ω
+1.0V 50Ω
OUTPUT LIMITS
Using the HP 81101A
The Trigger-Level Screen
MODIFY
Set TTL
Set ECL
*Voltage
TRG-LEV
65