Tektronix TDS 520A, Руководство по обслуживанию

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Typical Characteristics
Specifications
1Ć22
TableĂ1Ć13:ăTypical Characteristics Ċ Signal Acquisition System (Cont.)
NameDe scription
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#
'
Volts/Div Setting Step
Amplitude
Settling Error (%)
3
& &
&(&
& & v
v
v
20 ns
v
v
v
100 ns
v
v
v
20 ms
v
v
v
1 Thelimits aregiven for signals having pulseheight
≥
5 div, reference level = 50% midĆpoint, filter set to Sin (x) /x acquired at
≥
5
mV/div, 1.4 v
Tr
/
Si
v 5, where S
i
is thehardwaresampleinterval and t
r
is thesignal risetime.
2 The numbers given are valid 0 _ C to +30 _ C and will increase as the temperature increases due to the degradation in bandwidth.
Risetimeis calculated from thebandwidth. It is defined by thefollowing formula:
Rise Ą Time Ą ( ns ) +
400
BW Ą ( MHz )
Notethat if you measurerisetime, you must takeinto account therisetimeof thetest equipment (signal source, etc.) that you
useto providethetest signal. That is, themeasured risetime(RT
m
) is determined by the instrument rise time (RT
i
) and therise
timeof thetest signal source(RTgen) according to thefollowing formula:
RT
m
Ą
2
+ RT
i
Ą
2
) RT
gen
Ą
2
3 The values given are the maximum absolute difference between the value at the end of a specified time interval after the midĆlevel
crossing of the step, and the value one second after the midĆlevel crossing of the step, expressed as a percentage of the step
amplitude.
TableĂ1Ć14:ăTypical Characteristics Ċ Time Base System
Name Description
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