Racal Instruments 3162A/B, User Manual

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User Manual 3162A/B
Using The Instrument 3-1
Chapter 3
USING THE INSTRUMENT
Overview
This chapter contains information about how to operate the Model 3162A/B.
Unlike bench-type instruments, the Model 3162A/B must be programmed to
turn on functions, change parameters and configure various operating modes.
Two graphical interfaces are available for programming the instrument:
VXIbus
plug&play and WaveCAD. LabWindows/CVI drivers and a set of SCPI
commands are available for experienced programmers. SCPI (Standard
Commands for Programmable Instruments) commands for the Model 3162A/B
are listed in Table 4-1. This manual provides information on low-level
programming using SCPI commands only. The following paragraphs describe
the various modes of operation and give examples of how to program the Model
3162A/B.
NOTE
The Model 3162B has the same functionality as the Model
3162A. This manual describes all functions and feature that
are available on the Model 3162B. If you own the Model
3162A, simply ignore all references in this chapter to the
second output channel.
Inter-Channel
Dependency
The Model 3162B has two output channels. Although this is a two-channel
instrument, most of the commands that set parameters and functions are
common for both channels. For example, sample clock and trigger modes
cannot be set separately for each channel. On the other hand, you may
program each channel to have a different function shape, amplitude and offset.
Table 3-1 lists the functions and parameters and their related inter-channel
dependency.
Output
Termination
During use, output connectors must be properly terminated to minimize signal
reflection or power loss due to an impedance mismatch. Proper termination is
also required for an accurate amplitude level at the main output connector. Use
50
Ω
cables and terminate the main and SYNC cables with terminating
resistors. Always place the 50
Ω
termination at the far end of each cable.
Input/Output
The Model 3162B provides protection for internal circuitry connected to input
and output connectors. Refer to the specifications in Appendix A to determine