VXA Measurement Application
Vector Modulation Analysis (89601X Option AYA)
Vector Modulation Analysis (89601X Option AYA)
Description | Specifications | Supplemental Information |
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Accuracy |
| Formats other than FSK, 8/16VSB, 16/32 APSK, |
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| and OQPSK; Conditions: Full scale signal, fully |
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| contained in the measurement span, frequency < |
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| 3.6 GHz, random data sequence, range ≥ |
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| dBm, start frequency ≥ 15% of span, alpha/BT ≥ |
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| 0.3 (0.3 to 0.7 for OQPSK), and symbol rate ≥ |
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| 1 kHz. For symbol rates < 1 kHz, accuracy may be |
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| limited by phase noise. Averaging = 10 |
Residual Errors | Result = 150 symbols |
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| averages = 10 |
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Residual EVM |
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Span | EVM |
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≤100 kHza | <0.50% rms |
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≤1 MHz | <0.50% rms |
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≤10 MHz | <1.00% rms |
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Magnitude Error |
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Span | Error |
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≤100 kHz | <0.30% rms |
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≤1 MHz | <0.50% rms |
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≤10 MHz | <1.00% rms |
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Phase Error |
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Span | Error |
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≤100 kHza | 0.3° rms |
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≤1 MHz | 0.4° rms |
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≤10 MHz | 0.6° rms |
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Frequency Error | Symbol rate/500,000 | Added to frequency accuracy if applicable |
IQ Origin Offset | −60 dB or better |
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Video Modulation Formats |
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Residual EVM | ≤1.5% (SNR ≥36 dB) | Symbol rate = 10.762 MHz, |
8/16 VSB |
| α= 0.115, frequency < 3.6 GHz, |
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| 7 MHz span, |
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| range ≥−30 dBm, |
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| result length = 800, averages = 10 |
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254 | Chapter 24 |
