User`s guide

Output Termination - Sets the termination impedance for the selected channel. This list control is available only when
the Custom 1-Custom 3 presets are selected.
Overlays command (Display menu) - Gives the user the option of displaying up to 10 measurements, or sets of
measurements, on top of each other for comparison on the same plot. The most recent measurement is a dark line
while previous measurements are light lines of the same color.
Padding Multiplier - Padding increases the frequency resolution of the FFT. Default is 16. Generally, a higher padding
value will increase transformation processing time.
Passes to Average FFT - Selects the number of passes to average for the FFT output. Averaging will generally reduce
the noise floor of the FFT.
Passes to Average PPM - Sets how many of the PPM histograms (sample size determined by 'PPM Samples') are
measured. The PPM plus and PPM minus are then the average of these histograms.
Pattern - Displays current pattern being used.
Pattern (SSC) - Select the data pattern type. 10 means the data is a 101010 clock-like pattern. 1100 means the data is a
110011001100 clock like pattern, etc.
Pattern Button - Opens a page of pattern options.
Pattern Marker - Repeating edge, once per pattern, which occurs
at same relative position in the pattern (See figure to the right.)
Pattern Marker (PM50) - Selects the pattern marker card that will be used. PM1 designates that a pattern marker card
is attached to data channel 1 and a pattern marker will be generated from the data on channel 1. This Pattern Marker
can be used as an arm by any channel.
Pattern Marker Mode (AG-100 and PM50) - **Only available in
SIA-3000 with PM-50 (pattern marker) option.**
The PM-50 can be selected (via the Trigger button) to generate the marker. This field allows configuration of the
PM-50 as either Edge Count or Pattern Match. See PM-50 Online Help. Select either Pattern Match or Edge
Count. In Pattern Match mode, the pattern marker card will generate a Pattern Marker when matching a unique 40-
bit sequence of a pattern. The Patn Mkr Standard then needs to be selected accordingly. In Edge Count mode, the
pattern marker card will generate a pattern marker upon repetition of a user-specified number of positive or negative
edges (frequency agile from xMHz to 5GHz). For PRBS patterns use Edge Count mode only.
Pattern Marker Standard (Optical) - Choose the interface standard speed being used when in Pattern Match mode (i.e.
FC 1x, FC 2x, GBE…).
AG-100 Pattern Marker Standard
Select either Fibre Channel or Gigabit Ethernet.
Speed = 1X Speed = 2X
Fibre Channel (FC) 1.0625 Gb/s 2.125 Gb/s
Gigabit Ethernet (GBE) 1.25 Gb/s 2.5 Gb/s
Pattern Match - Pattern Match mode is used when the pattern has a unique, repeating 40-bit word in the pattern. In the
case of Fibre Channel compliant patterns, the Start Of Frame (SOF) header is used. For example, for CRPAT, the
SOF is "3EAAA6A5A9". To have the AG-100 generate a marker using CRPAT, the push wheel switches would be
set to "3EAAA6A5A9" or input from the GUI interface in GigiView would be used. Every time the AG-100
recognizes this unique 40-bit pattern, it will produce an arm signal. Pattern marker mode can be used manually or
with GigiView software.
Peak-to-Peak - For any type of jitter, the minimum, full range of the jitter values that excludes (includes all but) 10
-12
of
the total jitter population.
Perform Calibration - The Perform Calibration selection is used to access the instrument's calibration options and has a
separate button for each option. The instrument firmware version is used by GigaView to determine which features the
instruments can support and is displayed at the top of the dialog window. A time/date stamp below the firmware
identifier is a log of when the instrument was last calibrated through GigaView. See Appendix C for more information.
Perform Optimization - Automatically positions the pattern marker in a low transition density region of the data pattern
to ensure reliable jitter measurements. Perform Optimization needs to be initiated whenever a change has occurred
to the setup conditions such as adding more jitter to the data pattern for tolerance testing.
© WAVECREST Corporation 2005 Glossary
327