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Connectors
Chapter 9
288
EXT SCOPE TRIG IN
This connector provides an external oscilloscope’s trigger input.
Operating Considerations
Input threshold approximately 2.5 V
Maximum Input level approximately 20 V peak
Input impedance is:
• 100 k Ω for signals ≤ 5.6 V peak
•5 k Ω for signals >5.6 V peak
When measured with no load on the input, a 5 Volt level is present on the connector due
to the internal pull-up resistor design.
FRAME CLOCK OUT
This output provides an external connection to several internal clocks. The clocks are
selected using the Frame Clock Output field on the INSTRUMENT CONFIGURE
screen. The frame clock selections are as follows:
• 20.00 ms
• 26.67 ms
• 80.00 ms
•2.00 s
GPIB
This connector allows communication between the Test Set and other instruments or
computers using the GPIB Interface Bus.
For more information see the “GPIB Adrs” on page 236.
MEMORY CARD Slot
This front-panel opening is where PC cards are inserted.