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E6835A Datasheet(PDF) 3 Page - Agilent(Hewlett-Packard) |
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E6835A Datasheet(HTML) 3 Page - Agilent(Hewlett-Packard) |
3 / 4 page 3 Error vector magnitude (EVM) measurement This measurement calculates composite EVM and several other results relating to UE modulation quality. Input level range Average power –25 to +28 dBm/1.28 MHz UE ranges EVM ≤ 20% rms Frequency error < ±20 kHz Timing error < ±25 chips EVM measurement accuracy (Includes residual EVM) < ±2.5% rms Filter 1.28 MHz (RRC) Measurement results EVM, magnitude error, phase error, origin offset Frequency error measurement This measurement measures the difference between the carrier frequency transmitted from the UE and the expected frequency. The UE uses the same frequency source for both RF frequency generation and the chip clock. Input level range Average power –25 to +28 dBm/1.28 MHz UE ranges EVM ≤ 20% rms Frequency error < ±20 kHz Timing error < ±25 chips Measurement accuracy < (±10 Hz + timebase accuracy) Filter 1.28 MHz (RRC) Measurement results Frequency error Peak code domain error (PCDE) measurement This measurement is computed by projecting power of the error vector onto the code domain at a specific spreading factor. The code domain error for every code in the domain is defined as the ratio of the mean power of the projection onto that code, to the mean power of the composite reference waveform. This ratio is expressed in dB. The PCDE is defined as the maximum value for the code domain error for all codes. Input level range Average power –25 to +28 dBm/1.28 MHz UE ranges EVM ≤ 20% rms Frequency error < ±20 kHz Timing error < ±25 chips Measurement accuracy < ±0.3 dB Filter 1.28 MHz (RRC) Measurement results Maximum value of CDE Dynamic Power Measurement This measurement provides a fast and flexible method for calibrating the power accuracy of a wireless device by providing multiple Tx power measurements at a single frequency. It tracks and reports the power result for each step. To take advantage of this measurement capability, the wireless device must have a test mode that outputs an appropriate power ramp at each frequency with the expected number of steps and dwell time at each step (step length). Input level range Average power –65 to +28 dBm/1.28 MHz Amplitude capture range With 7 dB crest factor < ±2 dB of expected power Measurement accuracy1 +2 to –42 dB of expected power –54 to +28 dBm/1.28 MHz < ±0.6 dB, typically < ±0.3 dB –61 to < –54 dBm/1.28 MHz < ±0.7 dB, typically < ±0.4 dB +2 to –42 dB of expected power With < 48 hours warm-up before self alignment initiated –54 to +28 dBm/1.28 MHz < ±0.7 dB, typically < ±0.3 dB –61 to < –54 dBm/1.28 MHz < ±0.8 dB, typically < ±0.4 dB Measurement repeatability Typically < ±0.05 dB Trigger setup Sources External, fall, rise Step Length and Number of Steps parameters are coupled to the setting of the Filter: Filter Step length (SL) Number of steps 1 kHz 0.5 to 180 ms 1 to (1048000/(21973 x SL)) 30 kHz 0.25 to 180 ms 1 to (1048000/(60e3 x SL)) 100 kHz 0.1 to 20 ms 1 to (1048000/(250e3 x SL)) 300 kHz 0.1 to 20 ms 1 to (1048000/(600e3 x SL)) 640 kHz 0.1 to 20 ms 1 to (1048000/(1.28e6 x SL)) 1.23 MHz 0.1 to 20 ms 1 to (1048000/(2.46e6 x SL)) 1.28 MHz 0.1 to 20 ms 1 to (1048000/(2.56e6 x SL)) 1.6 MHz 0.1 to 20 ms 1 to (1048000/(3.2e6 x SL)) 3.84 MHz 0.1 to 20 ms 0.1 to (1048000/(7.68e6 x SL)) 5.0 MHz 0.1 to 20 ms 0.1 to (1048000/(10e6 x SL)) 8PSK estimated carrier power 0.575 to 20 ms 1 to 1047800/(1.0833e6 x SL) GSM Tx power 0.1 to 20 ms 1 to (1048000/(320e3 x SL)) W-CDMA mean power) 0.1 to 20 ms 1 to (1048000/(5.25e6 x SL)) Measurement result A graph displaying the discrete power at each power step along with numeric power results for each step 1. Additional accuracy error when using RF OUT ONLY port is < ±0.1 dB. |
Similar Part No. - E6835A |
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Similar Description - E6835A |
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