Range - Agilent Technologies 8753ET 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 MHz to 2.001 GHz
Frequency Spacing F

1
Range =
----- - or
--------------------------------------------------------------- -
F
1
Range
= ----------------------- -
6
  
10 10
9 –

Range =
100 10 seconds
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

range the speed of light 3
=
 

 
9 –
100
s
10
 


–
 

1

m
8

10
--- -


m
8

3
10 --- -

s


s