HP 54520 Series Service Manual page 20

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Chapter 1: General Information
Operating Characteristics
State Trigger
After selecting any front panel channel or external trigger input as a clock, a pattern is
specified using any of the remaining front panel inputs. The user may specify that a trigger
will occur on the rising or falling edge of the input specified as the clock, when the pattern is
present or not present, Setup time for the pattern with respect to the clock is 10 ns or less
and hold time is zero.
Delayed Trigger
Event-Delayed Mode The trigger can be qualified by an edge, pattern, time qualified
pattern, or state. The delay can be specified as a number of occurrences of a rising or
falling edge of any one of the selected channels. After the delay, an occurrence of a rising
or falling edge of any of the three inputs will generate the trigger. The trigger occurrence
value is selectable from 1 to 16,000,000. The maximum edge counting rate is 70 MHz.
Time-Delayed Mode The trigger can be qualified by an edge, pattern, or state. The
delay is selectable from 30 ns to 160 ms. After the delay, an occurrence of a rising or
falling edge of any one of the selected channels or external trigger will generate the
trigger. The trigger occurrence value is selectable from 1 to 16,000,000. The maximum
edge counting rate is 70 MHz.
TV Trigger .
60 Hz /525 Lines Trigger source is selected to be any front-panel input. Trigger level is
adjustable for the selected trigger source. Polarity is selected for positive or negative
synchronizing pulses. <A trigger occurs on the selected line and field of a 2/1 interlaced
composite video signal. Line numbering is 1 to 263 for field 1 and 1 to 262 for field 2.
This TV trigger mode is compatible with broadcast standard M.
50 Hz / 625 Lines Same as 60 Hz/ 525 lines except that line numbering is 1 to 313 for
field 1 and 314 to 625 for field 2. This TV trigger mode is compatible with broadcast
standards B, ©, D, G, H, I, K, K1, L, and N.
User-Defined Mode Source is selected to be any front-panel input. Trigger level is
adjustable for the selected source. The trigger is qualified with a high or low pulse that
meets a selectable time range. The trigger is an occurrence of a rising or falling edge of
the source after the qualifying pulse. The time settings for the qualifier are selectable
from 20 ns to 160 ms. The trigger occurrence value is selectable from 1 to 16,000,000.
NOTE: All TV trigger modes require a clamped video signal for stable triggering. Use the
HP 1133A TV/Video Sync Pod to provide clamped video output that can be used in conjunction
with the oscilloscope's TV triggering capabilities.
Glitch Trigger
Triggers the oscilloscope on a positive or negative glitch which is less than or greater than a
selectable setting. Settings are 2.5 ns, 5 ns, 10 ns, 20, 40, 60 ns.... The oscilloscope will
trigger on glitches from 1 ns to 160 ms. Glitch accuracy from 2.5 to 10 ns is +1.5 ns and from
20 ns to 160 ms is +(8% +2 ns).
Data Display Resolution 501 points horizontally by 256 points vertically.
Number of Screens You can select 1, 2, or 4 screens. This can provide overlapping
channels or memories for comparison, or can provide separate displays on a split viewing
area.
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