HP 1660CS, User Manual

Page: 152 / 347

Timing acquisition modes (timing only)
The Timing Acquisition mode field identifies the acquisition type, the channel
width, and sampling speed of the present acquisition mode. There are three
acquisition modes, and a total of five configurations.
Conventional Acquisition Mode
In Conventional Acquisition mode, the analyzer stores measurement data at
each sampling interval.
Conventional full-channel 250 MHz The total memory depth is
4 K with data being sampled and stored as often as every 4 ns.
Conventional half-channel 500 MHz The total memory depth is
8 K with data being sampled and stored as often as every 2 ns.
Transitional Acquisition Mode
In Transitional Acquisition mode the timing analyzer samples data at regular
intervals, but it only stores the data when it detects a transition on some
channel. Both transitional modes store time tags for each stored data sample.
Transitional full-channel 125 MHz The total memory depth is 4 K
per channel with 34 channels per pod pair. Data is sampled for new
transitions as often as every 8 ns.
Transitional half-channel 250 MHz The total memory depth is 8 K
with 17 channels on one pod. The pod used within the pod pair is
selectable. Data is sampled for new transitions as often as every 4 ns.
Glitch Acquisition Mode
A glitch is defined as a pulse with a minimum width of 3.5 ns and a maximum
width of the sample period. In Glitch Acquisition mode the timing analyzer
samples data at regular intervals as it does in Conventional Acquisition mode,
but it also looks for a rising and a falling edge occurring between samples.
Every sample is stored. When an edge pair is detected in the sample period a
vertical dashed line is displayed.
Glitch half-channel 125 MHz In Glitch mode, the total memory depth
is split between data storage and glitch storage. Data acquisition memory
depth is 2 K per channel. Glitch storage is 2 K per channel. Data is
sampled for new transitions every 8 ns, or with every sample period if it
is larger.
The Analyzer Format Menu
Timing acquisition modes (timing only)
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