Example 2: Bad Source Stop Frequency; Example 3: Outside Analyzer Frequency Band - Agilent Technologies PSA Series Manual

So the PSA start frequency should be adjusted enough to ensure that it
is at least 1 bucket width greater than the source minimum frequency.
(Find the source minimum frequency using the PSA command
SOURce:EXTernal:FREQuency:STARt? MIN)

Example 2: Bad Source Stop Frequency

Using 50 GHz PSA (E4448A) and 44 GHz source (for example, an
E8267D):
PSA settings:
• Start Freq = 42 GHz
• Stop Freq = 44 GHz
• Sweep Points = 101
• Offset = OFF
• Harmonic = OFF
This will cause the "Freq range of ext src exceeded" error.
Reason:
The signal source must be able to sweep one "bucket's" worth of
frequency range after the requested PSA start frequency. In this case:
42E(9)
Source Start Freq
= ------------------------------------------------------------------------------- -
44E 9 ( )
Source Stop Freq
= --------------------------------------------------------------------------------- -
But 44.02 GHz is not in the range of the signal source.
So the PSA stop frequency should be adjusted enough to ensure that it
is at least 1 bucket width less than the source maximum frequency.
(Find the source maximum frequency using the PSA command
SOURce:EXTernal:FREQuency:STOP? MAX)

Example 3: Outside Analyzer Frequency Band

Using any PSA and any source:
PSA settings:
• Start Freq = 2.5 GHz
• Stop Freq = 3.5 GHz
Chapter 5
44E 9 ( ) 42E 9 ( )
⎛
–
0
----------------------------------------- -
+ –
⎝
101 1
–
1
44E 9 ( ) 42E 9 ( )
⎛
–
0
----------------------------------------- -
+ +
⎝
101 1
–
1
FAQs and Helpful Hints and Tips
⎞
⎠
41.98E 9 ( ) = 41.98 GHz
=
⎞
⎠
44.02E 9 ( ) = 44.02 GHz
=
Hints and Tips
71