ARB
The ARB mode redefines the 3314A as an arbitrary waveform generator. ARB waveforms
are user defined waves made up of a series of voltage ramps called vectors. Each of
the 3314A's six ARB registers contain at least two vectors. Since a maximum of
'160
vectors are available, a single ARB waveform can contain up to 150 vectors
.
To build
a waveform, determine the number of vectors, their lengths and heights, and most of
the normal wave parameters allowed in the function generator definition.
This section includes the following topics:
-
'
Building an ARB Waveform
-
Recalling an ARB
-
Clearing an ARB
ARB Waveforms and the HP-IB
-
Definitions
Building an ARB Waveform
Building an ARB waveform will help you understand the way vector parameters such
as height, length, and slope relate to each other and to waveform time and frequency
.
With a 3314A and a dual trace oscilloscope, use the following procedure to build and
display Waveform 51 (Exponent
ial
Charge/Discharge) in the WAVEFORM section of
this manual.
1. To insure enough vectors are available, clear the ARB waveform registers. Two
methods exist to clear registers. One clears
all
ARB and non-ARB registers in the
non-volatile memory. The other clears only ARB registers. Clearing all registers is
quickest. Hold the
PRESET
key of the 3314A down while turning on the power.
The 3314A performs its normal turn on sequence and displays E09 verifying
all
registers have been cleared. To clear only the ARB registers, refer to "Clearing an
ARB Waveform" in this section.
2.
Set up the oscilloscope as follows:
-
Channel A vertical coupling
'
vertical sensitivity
2V/DIV
-
Channel B vertical coupling
vertical sensitivity
2V/DIV
-
Time Base
0.8ms/DIV
-
Trigger on Channel B
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