PXIe-5842 VST (4 GHz BW) Modulation Quality

Error Vector Magnitude

Table 137. 64-QAM EVM (dB) by Average Power Level, Typical

PXIe-5842 VST (4 GHz BW)
Center Frequency 0 dBm -30 dBm
1.75 GHz to 3 GHz -52 -52
3 GHz to 8 GHz -50 -49
8 GHz to 10 GHz -50 -50
10 GHz to 12 GHz -50 -50
12 GHz to 16 GHz -50 -50
16 GHz to 18 GHz -49 -49
18 GHz to 22 GHz -49 -49
22 GHz to 26.5 GHz NaN -47
Conditions: RF OUT loopback to RF IN with 3 dB attenuator in the loopback; 12.5 MHz bandwidth 64-QAM modulated signal; pulse-shape filtering: root-raised cosine, alpha = 0.25; PXIe-5842 RF input reference level and RF output power level set to value specified; Offset Mode is Automatic; acquisition length: 300 µs.
Figure 55. 64-QAM EVM vs. Average Power, Measured.

PXIe-5842 VST (4 GHz BW)

Conditions: RF OUT loopback to RF IN with 3 dB attenuator in the loopback; 12.5 MHz bandwidth 64-QAM modulated signal; pulse-shape filtering: root-raised cosine, alpha = 0.25; Offset Mode is Automatic; acquisition length: 300 µs.

Figure 56. 64-QAM RMS EVM vs. Center Frequency, Measured.

PXIe-5842 VST (4 GHz BW)

Conditions: RF OUT loopback to RF IN with 3 dB attenuator in the loopback; 12.5 MHz bandwidth 64-QAM modulated signal; pulse-shape filtering: root-raised cosine, alpha = 0.25; PXIe-5842 RF input reference level and RF output power level set to value specified in legend; Offset Mode is Automatic; acquisition length: 300 µs.