Agilent EXA Signal Analyzer
Power Suite Measurements
c.As in footnote b, the specified ACPR accuracy applies if the ACPR measured substantially exceeds the analyzer dynamic range at the specified offset. When this condition is not met, there are additional errors due to the addition of analyzer spectral components to UUT spec- tral components. Unlike the situation in footnote b, though, the spectral components from the analyzer will be
The function is error = 10 × log(1 + 10−SN/10).
For example, if the UUT ACPR is −75 dB and the measurement floor is −85 dB, the SN ratio is 10 dB and the error due to adding the analyzer's noise to that of the UUT is 0.41 dB.
Fast ACPR Test [Plota]
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| Fast ACP - Standard Deviation vs. Time |
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| 0.50 |
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|
(dB) | 0.45 |
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0.40 |
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|
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0.35 |
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Deviation |
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|
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0.30 |
| Sweep Time = 6.2 ms |
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0.25 |
|
| ||
|
|
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0.20 |
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|
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Standard |
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|
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0.15 |
|
|
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0.10 |
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|
| |
|
|
|
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| 0.05 |
|
|
|
| 0.00 | 10 ms | 20 ms | 40 ms |
| 5 ms | |||
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| Nominal Measurement and Transfer Time (log) |
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a.Observation conditions for ACP speed:
Display Off, signal is Test Model 1 with 64 DPCH, Method set to Fast. Measured with an IBM compatible PC with a 3 GHz Pentium 4 running Windows XP Professional Version 2002. The communications medium was PCI GPIB IEEE 488.2. The Test Application Lan- guage was .NET C#. The Application Communication Layer was Agilent T&M Program- mer’s Toolkit For Visual Studio (Version 1.1), Agilent I/O Libraries (Version M.01.01.41_beta).
62 | Chapter 1 |
