Gpib Logic Levels; Claims And Repackaging - Agilent Technologies 8163A User Manual

Installation and Maintenance
CA U TI ON
CA U TI ON
220
Agilent Technologies products delivered now are equipped with connectors
having ISO metric-threaded lock screws and stud mounts (ISO M3.5×0.6) that are
black in color. Earlier connectors may have lock screws and stud mounts with
English-threaded lock screws and stud mounts (6-32 UNC) that have a shiny
nickel finish.
It is recommended that you do not stack more than three connectors, one on top of
the other.
Hand-tighten the connector lock screws. Do not use a screwdriver.

GPIB Logic Levels

The instrument's GPIB lines use standard TTL logic, as follows:
• True = Low = digital ground or 0 Vdc to 0.4 Vdc
• False = High = open or 2.5 Vdc to 5 Vdc
All GPIB lines have LOW assertion states. High states are held at 3.0 Vdc by
pull-ups within the instrument. When a line functions as an input, it requires
approximately 3.2 mA to pull it low through a closure to digital ground. When a
line functions as an output, it will sink up to 48 mA in the low state and
approximately 0.6 mA in the high state.
NO T E The GPIB line screens are not isolated from ground.

Claims and Repackaging

If physical damage is evident or if the instrument does not meet specification
when received, notify the carrier and the nearest Agilent Technologies
Sales/Service Office. The Agilent Technologies Sales/Service Office will arrange
for repair or replacement of the unit without waiting for settlement of the claim
against the carrier.
Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement
System, & Agilent 8166A Lightwave Multichannel System, Fourth Edition
GPIB Logic Levels