Example 3: Second Harmonic Sweep With A Sweep Offset - Agilent Technologies PSA Series User Manual

Example 3: Second Harmonic Sweep With a Sweep Offset

Suppose that you specify on your PSA Series analyzer that you wish to
perform a second harmonic sweep from 2.85 GHz to 3.00 GHz using 601
points, and an offset of 1.0 GHz. What is the actual range that the
signal source will sweep?
First of all, we need to work out our bucket size, or the bucket width.
This is given by the range in Hertz divided by (number of points minus
1), or
Bucket Width (in Hz)
so
Bucket Width (in Hz)
Now we can work out the external source's start frequency using the
following equation:
PSA Start Frequency
-------------------------------------------------------------------------------------------------------------------------------- -
2,850,000,000
= ----------------------------------------------------------------------------------------------------------
= 1,425,000,000 + 500,000,000 125,000
Finally we can work out the external source's stop frequency using the
following equation:
PSA Stop Frequency
-------------------------------------------------------------------------------------------------------------------------------- -
,
3 000,000,000
= ----------------------------------------------------------------------------------------------------- -
= 1,500,000,000 + 500,000,000
So if you specify on your PSA Series analyzer that you want to perform
a second harmonic sweep from 2.85 GHz to 3.00 GHz using 601 points
and a 1.0 GHz sweep offset, the signal source itself will actually sweep
from 1.924875 GHz to 2.000125 GHz.
Chapter 1
PSA Frequency Span (Hz)
= ------------------------------------------------------------------------------- -
PSA number of Sweep Points 1
150,000,000
= ----------------------------- - = 250,000 Hz
601 1 –
+ Sweep Offset Bucket Width –
Harmonic Number
, , ,
+ 1 000 000 000 – 250 000
2
,
– = 1 924,875,000 Hz
+ Sweep Offset + Bucket Width
Harmonic Number
+ 1,000,000,000 250,000 –
2
,
+ 125,000 = 2 000,125,000 Hz
Getting Started
Option 215 Limitations
–
,
= 1.924875 GHz
= 2.000125 GHz
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