User manual

3152B User Manual Publication No. 980935 Rev. M
4-10 ArbConnection Astronics Test Systems
Figure 4-7, Standard Waveforms Panel
Waveforms
The Waveforms group provides access to a library of built-in
stan
dard waveforms. The library includes Sine, Triangle, Square,
Pulse Ramp, Sinc, Exponential, Gaussian,
and DC waveforms.
Each waveform has one or more parameters to
adjust the required
characteristics of the output. For example, phase start can be
adjusted for the sine and triangle waveforms, and duty-cycle can be
adjusted for the square waveform. For the pulse waveform
, you
may adjust the rise and fall time, as well as the
width and delay.
Parameters associated with each waveform are automatically
displayed when you select the waveform.
Note that by clicking a button in this group, you immediately update
the 3152B output with this waveform shape.
Parameters
The parameters group contains buttons that control the output
frequency and the 10 MHz reference source.
The Frequency control lets you set
the output frequency of the
selected waveform shape.
When this control is selected and
highlighted, you may modify it using the dial, keyboard, or [↑] [↓}
keys to adjust the readout to the required setting. After you modify
the reading, click on the Modify/Execute knob to update the 3152B
with the new value.
10 MHz Ref – The 10
MHz group contains buttons that control the
source of the 10
MHz reference for standard waveforms. The
10 MHz clock is the reference that feeds
the sample clock and the
DDS clock, and therefore determines accuracy and stability
. The
internal 10 MHz source has 1 PPM
stability over the operating
temperature range, and a time stability of 1 PPM per
year). The
accuracy of the internal source is adjustable, but will shift
with time
and temperature.
When better accuracy or stability is required,
or when clock
synchronization to other devices is necessary, you may select