Racal Instruments 3162A/B, User Manual

Page: 37 / 144

User Manual 3162A/B
Using The Instrument 3-3
Function / Parameter Default Inter-Channel
Dependency
Trigger Slope: Positive Common
Trigger Level: 1.6 V Common
Internal Trigger Period: 100
µ
s Common
PLL State: Off Common
AM State: Off Separate
Shared Memory State: Off Separate
Shared Memory Mode: Write Separate
Table 3-1, Default Conditions After Power On or After *RST (continued)
What To Do Now
When writing low level code to operate the Model 3162B, follow the instructions
in this chapter to understand the meaning and response that each command
generates. Examples contained in the following paragraphs show basic
techniques of how to program output waveforms.
Example 1
The following example programs the Model 3162B to turn on the main outputs
and program the waveform frequency to 20 MHz. It programs channel A to
output a square waveform with an amplitude of 2V and offset of 0.5V, and
programs channel B to output a triangular waveform with an amplitude of 1V
and offset of 0.5V.
/* Reset the Model 3162B to its default condition as listed in Table 3-1. */
:RESet;
/* Change the output waveform to square. Note that there is no need to use the
FUNC:MODE command as the default value after RESet is FIXed. */
:FUNCtion:SHAPe SQUare;
/* Change the frequency to 20MHz. Note that the frequency setting is common
for both channels. */
:FREQuency 20e6;
/* Change channel A amplitude to 2V and the offset to 0.5V. */
:VOLTage 2;
:VOLTage: OFFSet 0.5;
Note that output peak voltage may never exceed
±
2.5V. Amplitude and offset
may be set freely within a 5V window, as long as the following limits are kept: