Tektronix 2465B - Page 160

Performance Characteristics
Table 6-4 (cont)
Characteristics
Performance 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
LSD
b
+ [0.0008 X (A SEC/DIV)] +
[0.01 x (B Time/Div)
c
] + 83 ps.
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
b
+ [0.01 x (B Time/Div)
c
] + [10 ppm x
(A SEC/DIV)] + [10 ppm x (measured interval)]
+ 50 ps + TJE.
If CH 3 or CH 4 is one channel of a two-channel
measurement, add 0.5 ns for channel-to-channel
delay mismatch.
LSDb + lt
rREF
-t
rDELT
l
d
+ TJE +
[(0.0005 div) x (1/SR
REF
+ 1/SR
DELT
)] +
[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/SR
REF
+ 1/SR
DELT
)]
for trigger offset.
In Auto Resolution, twice per second or once
for every four sweeps, whichever is slower.
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.
b
See Tables 2-1 and 2-2.
C
B Time/Div includes SEC/DIV, XlO MAG, and VAR.
d
This term assumes the trigger points are between the 10% and 90% points of the
waveforms. Fall time is expressed as a negative risetime.
6-32
2465B/2455B/2445B Operators