Specifications

Guide to Operation
24
REAR PANEL SUMMARY
POWER ENTRY MODULE
The power entry module is used to fuse the line,
select the line voltage, and block high frequency
noise from entering or exiting the instrument.
Refer to the first page of this manual for
instructions on selecting the correct line voltage
and fuse.
IEEE-488 STD PORT
The 24 pin IEEE-488 connector allows a computer
to control the SR400 via the IEEE-488 or GPIB
instrument bus. The address of the instrument is
set from the front panel using the COM menu.
RS-232 CONNECTOR
The RS-232 interface connector is configured as a
DCE. The baud rate, parity, character length, and
echo mode are programmed from the front panel
using the COM menu.
INPUT
INHIBIT is a TTL input which disables the A,B,
and Tdiscriminators when it is high. The minimum
pulse width is 10 ns.
OUTPUT
The PORT1 and PORT2 D/A analog outputs
provide -10 V to +10V, user programmable
outputs. The outputs may be scanned to drive the
X axis of a recorder or scope during scans. Output
impedance is < 1 Ω and the maximum current
output is 10 mA.