Publication No. 980935 Rev. A
3152B User Manual
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
another source. The 10 MHz source options are:
•
Internal: from the built in source
•
External: applied to the front panel 10 MHz input connector
•
CLK10: Available on the VXI backplane. The CLK10 source
has the least accuracy and stability of the three options, but
is useful for synchronization with other VXI modules.
Arbitrary/Sequence
The Arbitrary/Sequence panel (Figure 4-8), is invoked by clicking
the Arbitrary/Sequence button on the Panels bar. Note that if you
invoke the Arbitrary/Sequence Panel from the Panels menu, the
3152B will not change its output type. On the other hand, if you
select the Arbitrary or Sequenced option from the Main Panel, the
3152B will immediately change its output to the selected waveform
type. The functional groups in the Arbitrary Waveforms Panel are
described below.
General Parameters
The General Parameters group contains two parameters: Amplitude
and Offset. The values in this group may be duplicated on other
panels. When you change amplitude or offset in the Parameters
group, the other panels are updated automatically.
SCLK
The SCLK (Sample Clock) controls let you select the source of the
sample clock and set the sample clock frequency. The sample clock
setting affects the 3152B in Arbitrary mode only. It is programmed
in units of samples per second (S/s), and will affect the instrument
only when it is programmed to output arbitrary or sequenced
waveforms. The SCLK parameter has no effect on the frequency of
standard waveforms.
The three switches in the SCLK group set the sample clock input to
Internal, External, or ECLT0. The default is Internal. When you
select External, make sure an appropriate signal is connected to the
external sample clock connector on the rear panel. The ECLT0
source is a backplane signal that allows ECL level signals to travel
to all VXI modules.
Click on the SCLK button to access the SCLK parameter. The value
that is associated with the highlighted indicator appears on the
EADS North America Test and Services
ArbConnection 4-11
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
