8508A
Users Manual
Rear Panel Connectors and Pin Designations
Warning
This instrument can deliver a lethal electric shock.
To avoid electric shock, personal injury, or death, never touch any lead
or terminal unless you are absolutely certain that no dangerous voltage
is present.
Rear Inputs
For details of rear input terminals see Figure 2-2
External Trigger Input
This co-axial BNC socket can be used to trigger a measurement when external triggers
are enabled.
The single pin is pulled up internally to +5V, and requires a negative-going TTL edge to
initiate the reading.
IEEE 488 Input/Output
The IEEE 488 input/output is a 24-way Amphenol connector which is directly
compatible with the IEEE 488 interface and the IEC 625 Bus.
Note that the Bus Address is set from the front panel. See Chapter 4 for more information
about the IEEE 488 connector and remote operations.
Power-On Configuration
To turn the Multimeter on, use the Power Switch on the rear panel. The Multimeter
powers on in the following configuration:
Function DCV
Range 1 kV
Resolution 7-
1
/2 digits
Input Front
Filter Off
Fast On
External Guard Off
Scan Off
Monitor Off
Math Off
2-8
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