Tektronix 2445A - Page 19

Specification-2445A/2455A Service
Table 1-2
Option
06 (C/T /T) Electrical Characteriatlcs
Characteriatica
Maximum Input Frequency for Count and Delay by
Events
Minimum Width
of High or Low State of Input Signal
for Count and Delay by Events
Sensitivity
De
to 50 MHz (0.5 Hz to 50 MHz for Frequency
and Period)
CH 1 and CH 2
CH 3 and CH 4
50 MHz to 150 MHz
CH 1 and CH 2
CH 3 and CH 4
Ranges
Automatic Ranging
Accuracy
Time Base Error (TBE)
Resolution
Display Update Rate
•Performance requirement not checked In manual.
Performance Requirements
SIGNAL INPUT
With DC Coupling of A Trigger and B Trigger.
>=150 MHz.
<=3.3 ns.
For Count, Delay by Events, and
Logic Trigger Functions Excluding
Word Recognizer.
1.5 divisions.
0.75 division.
4.0 divisions.
2.0 divisions.
FREQUENCY
RANGE
LSD
1 Hz
100 nHz
10 Hz
1
þÿ¼Hz
100 Hz
10 þÿ¼Hz
1 kHz
100 þÿ¼Hz
10 kHz 1 mHz
100 kHz 10 mHz
1 MHz
100 mHz
10 MHz 1 Hz
100 MHz 10 Hz
150 MHz 100 Hz
Upranges
at 100% of full scale; downranges at 9% of full scale.
Downrange occurs at 90 MHz on 150 MHz range.
Full scale corresponds
to the value given in the Range column. The
maximum displayed value
for any range is the Range value minus
the LSD value.
± [Resolution + (Frequency X TBE)J Hz.
10 ppm with less than 5 ppm per year drift.
1.4
x Frequency² X T JE + LSD.
Twice per second
or twice the period of the input signal, whichever
is slower.
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