Option B25 (25 MHz) - Analysis Bandwidth
Other Analysis Bandwidth Specifications
Description | Specifications | Supplemental Information |
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SFDR |
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Signal Frequency within ±12 MHz of center |
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Signal Frequency anywhere within analysis BW |
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a. Signal level is
Description |
| Specifications | Supplemental Information |
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IF Frequency Responsea |
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Demodulation and FFT |
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response relative to the |
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center frequency |
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| 95th Percentile |
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Freq (GHz) | FFT Widthb | Max Errorc | Midwidth | Slope | Rmse |
| (MHz) | (Exceptions d) | Error | (dB/MHz) | (nominal) |
≤ 3.6 | ≤ 10 | 0.40 dB | 0.12 dB | 0.10 | 0.03 dB |
3.6 to 26.5 | ≤ 10 |
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| 0.25 dB |
≤ 3.6 | 10, ≤ 25 | 0.45 dB | 0.12 dB | 0.05 | 0.04 dB |
3.6 to 26.5 | 10, ≤ 25 |
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| 0.80 dB |
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a.The IF frequency response includes effects due to RF circuits such as input filters, that are a function of RF frequency, in addition to the IF
b.This column applies to the instantaneous analysis bandwidth in use. The range available depends on the hardware options and the Mode. The Spectrum analyzer Mode does not allow all bandwidths. The I/Q Analyzer is an example of a mode that does allow all bandwidths.
c.The maximum error at an offset (f) from the center of the FFT width is given by the expres- sion ± [Midwidth Error + (f ×Slope)], but never exceeds ±Max Error. Usually, the span is no larger than the FFT width in which case the center of the FFT width is the center frequency of the analyzer. When the analyzer span is wider than the FFT width, the span is made up of mul- tiple concatenated FFT results, and thus has multiple centers of FFT widths so the f in the equation is the offset from the nearest center. These specifications include the effect of RF fre- quency response as well as IF frequency response at the worst case center frequency. Perfor- mance is nominally three times better at most center frequencies.
d.The specification does not apply for frequencies greater than 3.6 MHz from the center in FFT widths of 7.2 to 8 MHz.
e.The “RMS” nominal performance is the standard deviation of the response relative to the cen- ter frequency, integrated across a 10 or 25 MHz span. This performance measure was observed at a center frequency in each harmonic mixing band, which is representative of all center frequencies; it is not the worst case frequency.
82 | Chapter 2 |
