HP 83480A User Manual

Eye, Mask and Eyeline Mode Measurement Tutorials
Making Eyeline Measurements
(HP 83480A Option 001 only)
NOTE
When the eyeline software rst boots up, the program instructs you to adjust for a valid trigger. Once
you proceed past this point in the program, you must not adjust the trigger level outside the valid
range. If you do, the instrument will lock up.To resume operation:
 cycle power o and on, or
 readjust the trigger level to within the range established earlier
Eyeline mode is not compatible with
N
NNNNNNNNNNNNNNNNNNNNNNNNN
2-12 GHz or
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
2-12 GHz Gate triggering bandwidth.
The
software
provides
two
modes
.
1.
The
eye
mode
displays
a
standard eye
diagram
and
gives
the
user
complete
control
of
the
pattern
generator
.
2.
The
eyeline
mode
puts
the
pattern generator
in
remote
and
executes
the
line
mode
operation.
N
O
T
E
Measurement
rate
is
strongly
inuenced
b
y
data
pattern
type
and
length.
Instrument throughput in eyeline mode is dominated by the rate at which
valid
triggers
are
generated
by
the
pattern generator
.
This
is
a
function
of
the
data
rate
,
pattern
length,
and pattern
type
.
The
highest
throughput
is
achieved with a zero substitution 2
7
or mark density 2
7
pattern. Longer
pattern lengths
are acceptable
, but will reduce throughput because only one
data point is
measured per an entire pattern. Long PRBS patterns are not
recommended because they result in
the lowest throughput.
Pattern generator settings can be adjusted
prior to running the eyeline
program or by halting remote control of the pattern generator by pressing:
5-47

HP 83480A Specifications

General

Brand	HP
Model	83480A
Category	Measuring Instruments
Language	English