Range - Agilent Technologies 8719ES User Manual

Making Time Domain Measurements

Range

Range

In the time domain, range is defined as the length in time that a measurement can be
made without encountering a repetition of the response, called aliasing. A time domain
response repeats at regular intervals because the frequency domain data is taken at
discrete frequency points, rather than continuously over the frequency band.
Measurement range
where ∆F is the spacing between frequency data points
Measurement range
For example:
Measurement =
201 points
Frequency Span = 1 GHz to 3 GHz
Frequency Spacing ∆F
(
1
Range = ------ - or ---------------------------------------------------------------- -
∆F
1
= ------------------------ -
Range
6
( × )
10 10
9 –
×
Range =
100 10
Electrical Length
ElectricalLength =
ElectricalLength 30 meters =
3-30
1
= ------ -
∆F
(
number of points 1
= ------------------------------------------------------------- -
frequency span Hz
( )
= 10 MHz
–
number of points
frequency span
( )
201 1 –
----------------------
or
9
( × )
2 10
seconds
×
= range the speed of light 3 10
 

× – 9 ×
100
10 s
 

)
–
( )
)
1

8
×


m
× 8
--- -
3
10

s

m
--- -

s