Specification-2445A/2455A
Service
Table 1-2 (cont)
Characteristics
Perfonnance Requirements
ADDED DELTA-DELAY-TIME CHARACTERISTICS WITH
C/T/T
Run After Delay
Accuracy
Triggerable After Delay
Accuracy
Superimposed Delta Time
Nonsuperimposed Delta Time
Display Update Rate
•Perfonnance requirement not checked
In
manual.
b See Tables 1-3 and 1-4.
ce
Time/Div Includes SEC/DIV, X10 MAG, and VAR.
LSD + [0.0008 X (A SEC/DIV)] + [0.01 X (B
Time/Div)C]
+
83
ps.
8
When the A Sweep is triggered by the Word Recognizer in
synchronous mode, add 1 ns for probe jitter;
in
asynchronous mode,
add 20 ns for probe jitter.
Both delays are within 70 ns to 10 times the A-SEC/DIV setting.
LSD
+ [0.01 X (B
Time/Div)C]
+ [10 ppm X (A SEC/DIV)] + [10
ppm x (measured interval)]
+ 50 ps + T JE.
8
If
CH
3
or
CH 4
is
one channel
of
a two-channel measurement, add
0.5 ns for channel-to-channel delay mismatch.
LSD
+ I
trREF
-
troELT
Id
+ TJE +
[(0.0005 div) X
(1/SRREF
+
1/SRDELT)]
+
[10 ppm X (A SEC/DIV)] + [10 ppm x (measured interval)] + 50 ps.
If A and B sweeps are triggered from different channels, add 0.5 ns
for channel-to-channel mismatch
+ [0.5 div x
(1/SRREF
+
1/SRoeLT)] for trigger offset.
In Auto Resolution, twice per second
or
once for every four sweeps,
whichever is slower.
8
In
1 ns, 100 ps, and 10 ps resolution modes, the update rate depends
on the A SEC/DIV setting and the trigger repetition rate.
This term assumes the trigger points are between the 10% and
90%
points
of
the waveforms. Fall time is expressed
as
a negative
risetime.
1-15
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