Data Acquisition and Stimulus
Pattern Generation Modules
“User-Defined Macro” and
“Loop” Simplify Creation of
Stimulus Programs
User macros permit you to define
a pattern sequence once, then
insert the macro by name
wherever it is needed. Passing
parameters to the macro will
allow you to create a more
generic macro. For each call to
the macro you can specify unique
values for the parameters.
Loops enable you to repeat a
defined block of vectors for a
specified number of times. Loops
and macros can be nested, except
that a macro can not be nested
within another macro. At compile
time, loops and macros are
expanded in memory to a
linear sequence.
Convenient Data Entry and
Editing Feature
You can conveniently enter
patterns in hex, octal, binary,
decimal, and signed decimal
(two’s complement) bases.
The data associated with an
individual label can be viewed
with multiple radixes to simplify
data entry. Delete, Insert, and
Copy commands are provided for
easy editing. Fast and convenient
Pattern Fills give the programmer
useful test patterns with a few
key strokes. Fixed, Count, Rotate,
Toggle, and Random are available
to quickly create a test pattern,
such as “walking ones.” Pattern
parameters, such as Step Size
and Repeat Frequency, can be
specified in the pattern setup.
ASCII Input File Format: Your Design
Tool Connection
The 16720A supports an
ASCII file format to facilitate
connectivity to other tools in your
design environment. Because the
ASCII format does not support
the instructions listed earlier,
they cannot be edited into the
ASCII file. User macros and loops
also are not supported, so the
vectors need to be fully expanded
in the ASCII file. Many design
tools will generate ASCII files and
output the vectors in this linear
sequence. Data must be in Hex
format, and each label must
represent a set of contiguous
output channels.
Configuration
The 16720A pattern generators
require a single slot in a logic
analysis system frame. The
pattern generator operates with
the clock pods, data pods, and
lead sets described later in this
section. At least one clock pod
and one data pod must be
selected to configure a functional
system. Users can select from a
variety of pods to provide the
signal source needed for their
logic devices. The data pods,
clock pods and data cables
use standard connectors. The
electrical characteristics of the
data cables also are described
for users with specialized
applications who want to avoid
the use of a data pod. The 16720A
can be configured in systems with
up to five cards for a total of 240
channels of stimulus.
Direct Connection to Your
Target System
The pattern generator pods can
be directly connected to a
standard connector on your
target system. Use a 3M brand
#2520 Series, or similar
connector. The 16720A clock or
data pods will plug right in.
Short, flat cable jumpers can be
used if the clearance around the
connector is limited. Use a 3M
#3365/20, or equivalent, ribbon
cable; a 3M #4620 Series, or
equivalent, connector on the
16720A pod end of the cable; and
a 3M #3421 Series, or equivalent,
connector at your target system
end of the cable.
Probing Accessories
The probe tips of the Agilent
10474A, 10347A, 10498A, and
E8142A lead sets plug directly
into any 0.1 inch grid with
0.026 inch to 0.033 inch diameter
round pins or 0.025 inch square
pins. These probe tips work with
the Agilent 5090-4356 surface
mount grabbers and with the
Agilent 5959-0288 through-hole
grabbers.
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AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
