Service manual

Overlay Mode: Multiple channels can be displayed on one waveform display line.
Primary use is to view summary of bus activity.
Maximum Number Of Displayed Waveforms: 24
Time Interval Accuracy
Channel to Channel Skew: 4 ns typical.
Time Interval Accuracy:
(sample period + channel-to-channel skew + 0.01%
of time interval reading).
Trigger Specification
Asynchronous Pattern: Trigger on an asynchronous pattern less than or greater
than specified duration. Pattern is the logical AND of specified low, high, or don’t
care for each assigned channel. If pattern is valid but duration is invalid, there is a
20 ns reset time before looking for patterns again.
Greater Than Duration: Minimum duration is 30 ns to 10 ms with 10 ns or 0.01%
resolution, whichever is greater. Accuracy is + 0 ns to -20 ns. Trigger occurs at
pattern + duration.
Less Than Duration: Maximum duration is 40 ns to 10 ms with 10 ns or 0.01%
resolution, whichever is greater. Pattern must be valid for at least 20 ns. Accuracy
is + 20 ns to -0 ns. Trigger occurs at the end of the pattern.
Glitch/Edge Triggering: Trigger on glitch or edge following valid duration of
asynchronous pattern while the pattern is still present. Edge can be specified as
rising, falling or either. Less than duration forces glitch and edge triggering off.
Measurement and
Display Functions
Autoscale (Timing Analyzer Only)
Autoscale searches for and displays channels with activity on the pods assigned to
the timing analyzer.
Acquisition Specifications
Arming: Each analyzer can be armed by the run key, the other analyzer, or the
external trigger on rear panel.
Trace Mode: Single mode acquires data once per trace specification; repetitive
mode repeats single mode acquisitions until stop is pressed or until time interval
between two specified patterns is less than or greater than a specified value, or
within or not within a specified range. There is only one trace mode when two
analyzers are on.
Labels
Channels may be grouped together and given a six character name. Up to 20 labels
in each analyzer may be assigned with up to 32 channels per label. Primary use is
for naming groups of channels such as address, data, and control busses.
General Information HP 1650B/1651B
1-8 Service Manual