Gpib Logic Levels; Serial Interface - Agilent Technologies 8163A User Manual

GPIB Logic Levels

Agilent 8163A/B, 8164A/B, and 8166A/B User's Guide, Fourth Edition
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.
N O T E
The GPIB line screens are not isolated from ground.

Serial Interface

The mainframe's serial interface has configurable and fixed
parameters.
• The Baudrate set for the serial interface of the instrument should
match that set for the PC serial interface connected to it.
• The PC serial interface should be configured to match the
instrument's fixed parameters.
Congigurable Parameters
Baudrate. Refer to "How to Set the Speed of the Serial Interface" on
page 68.
Fixed Parameters
These are:
Serial Interface Configuration - Fixed Parameters
Data Bits
Parity
Stop Bits
Flow Control
Installation and Maintenance
8
None
1
Hardware (RTS/CTS)
293