Newport 2832-C User Manual

Table I I - SAMPLE PRECStates and Limits.
SAMPLE PREC
A/D Accuracy Sample Frequency Range
20000 CNT
20,000 counts 0.001 Hz to 25.0 Hz
4096 CNT 4,096 counts
0.001 Hz to 500.0 Hz or 1000.0 Hz
Table 12 - DC SAMPLING Operations.
Menu Function
Keypad Commands Associated Remote Commands
SAMPLE PREC Edit PREC=
20,000,
SPREC, SPREC?
4096 CNT
SAMPLE FREQ Edit FREQ= SFREQ, SFREQ?
ddd.ddd HZ
2.4.8 Trigger Output
The Model 2832C's rear panel lTL trigger output allows it to coordinate
activities among other instruments. The trigger output can operate in several
ways: conversion complete, periodic output and comparator output. In
addition, the polarity of the trigger output can be specified.
CAUTION
Precautions should be taken whenever the trigger output is used to
coordinate activities among
instruments. Static discharges at or near the
meter
may cause false triggering, causing the trigger output to go active.
In TRIG ON CMPLT mode, a pulse is output after each reading has been
acquired and completely processed from either channel. When acquiring on
one channel, it indicates that the
283242 is ready to take another reading. The
width of this pulse
is at least 8 pS.
In TRIG AT FREQ mode, a pulse is output at a user defined frequency or rate.
Each pulse width is at least
8 pS and the programmable frequency range of the
pulses is
0.001 Hz to 1000.0 Hz.
In TRIG ON LEVEL mode, each measurement is compared to a programmable
trigger level. The units
of the trigger level always equal Watts for power
detectors.
If a measurement is less than the specified value, then the trigger
output
is inactive. If the measurement exceeds the specified value then the
trigger output becomes active. The TRIG ON LEVEL output is a shift in level
rather than a pulse.
If both channels are sampling when this function is initiated, the time lag
between subsequent triggers is less than
700 pec. If a R/S A or R/S B is
initiated twice, then the separation between
lTL OUTPUTS is relative to the
RUN command initialization, giving a time
lag up to one sample period be-
tween channel triggers (depending on sample frequency chosen).
The polarity of the trigger output is programmable
as active high or active
low.
If the polarity is active high then the output will idle low. If the polarity is
active low then the line will idle high.
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Newport 2832-C Specifications

General

Brand	Newport
Model	2832-C
Category	Measuring Instruments
Language	English