Operation
Word Recognizer Operation
Count functions, Delay-by-Events,
and
Logic Trigger functions can invoke the
available Word Recognizer
(WR),
if it
is
included
in
the instrument. The WR requires a
data radix, clock parameters,
and
a data pattern.
When
the WR
is
invoked, the following display guides radix and clock specification:
2-30
RADIX<BIN
OCT
HEX>
CLOCK<r
t
X>
1.
Turn Left-MENU-SELECT to underline RADIX.
2.
Turn Right-MENU-SELECT to the desired data format; BIN (binary), OCT
(octal), or
HEX
(hexadecimal).
3.
Turn Left-MENU-SELECT to CLOCK.
4.
Turn Right-MENU-SELECT to the desired clock function; r (rising edge), t
(falling edge), or X (asynchronous or no clock).
5.
Press the upper Trigger-MODE button to activate the function that invoked
the
WR.
6.
Specify the desired pattern. During operation of the function driven
by
the
WR,
the WR status is displayed
in
this format:
seq word
where the
Us"
character indicates the affected sweep
(A
or
B);
"CO
is
the clock mode (r, t, or
X);
"q" is the qualifier bit
(0,
1,
or
X);
and
"word" is a 16-bit pattern
in
the selected radix.
a.
Turn Left-MENU-SELECT to the clock mode character, the qualifier bit,
or a digit of the word.
b.
Turn Right-MENU-SELECT to define the underlined character. Digits of
the word can
be
set to
0,
1,
or X with BIN radix, 0 to 7 or X with
OCT,
and
0 to F or X with
HEX.
Note that the clock can be redefined here.
7.
Connect the WR probe to the system under test. Note that bits 0 to 7 and
the clock appear on one side of the probe and bits 8 to 15
and
the qualifier
appear
on
the other.
Be
sure to connect at least one
of
the
GND
terminals
to a good signal ground
in
the system,
as
close to the signal test
pOints
as
possible.
2465A/2455A/2445A Operators
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