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 yvaveform
- Clearing an ARB Waveforrri
- 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 (Exponential 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 '
500
vertical
sensitivity
2V/DIV
- Channel B vertical coupling
500
vertical
sensitivity
2V
/DIV
- Time Base
0.8ms/DIV
- Trigger on Channel B
43
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