E4416A_E4417A EPM-P Series Power Meters and E-Series E9320 Peak and Average Power Sensors.pdf - 第13页

Find us at www.keys ight.com Page 13 Figure 4. Typic al power line arity at 25 ° C for the E9323A an d E9327A 5 MH z bandwidth sens ors, after zer o and calibratio n, with associat ed measurem ent uncert ainty. Power ran…

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Figure 3. Typical SWR for the E9323A and E9327A sensors at various power levels.

Sensor Linearity

Table 6a. Power sensor linearity, normal mode (upper and lower range).

Sensor model Temperature (25 ± 10 °C) Temperature (0 to 55 °C)

E9321A and E9325A

± 4.2%

± 5.0%

E9322A and E9326A

± 4.2%

± 5.0%

E9323A and E9327A

± 4.2%

± 5.0%

Table 6b. Power sensor linearity, average only mode (upper and lower range).

Sensor model Temperature (25 ± 10 °C) Temperature (0 to 55 °C)

E9321A and E9325A

± 3.7%

± 4.5%

E9322A and E9326A

± 3.7%

± 4.5%

E9323A and E9327A

± 3.7%

± 5.0 %

If the sensor temperature changes after calibration, and the meter and sensor is not re-calibrated, then

the following additional linearity errors should be added to the linearity figures in Tables 6a and 6b.

Table 6c. Additional linearity error (normal and average only modes).

Sensor model Temperature (25 ± 10 °C) Temperature (0 to 55 °C)

E9321A and E9325A

± 1.0%

E9322A and E9326A

± 1.0%

E9323A and E9327A

± 1.0%

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Figure 4. Typical power linearity at 25 °C for the E9323A and E9327A 5 MHz bandwidth sensors, after zero and

calibration, with associated measurement uncertainty.

Power range –30 to –20 dBm –20 to –10 dBm –10 to 0 dBm 0 to +10 dBm +10 to +20 dBm

Measurement uncertainty

0.9%

0.8%

0.65%

0.55%

0.45%

Figure 5. Relative mode power measurement linearity with an EPM-P series power meter, at 25 °C (typical).

Figure 5 shows the typical uncertainty in making a relative power measurement, using the same power

meter channel and the same power sensor to obtain the reference and the measured values. It also

assumes that negligible change in frequency and mismatch error occurs when transitioning from the

power level used as the reference to the power level measured.

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Peak Flatness

The peak flatness is the flatness of a peak-to-average ratio measurement for various tone- separations

for an equal magnitude two-tone RF input. Figures 6, 7 and 8 refer to the relative error in peak-to-

average measurement as the tone separation is varied. The measurements were performed at –10 dBm

average power using an E9288A sensor cable (1.5 m).

Figure 6. E9321A and E9325A Error in peak-to-average measurements for a two-tone input (high, medium, low and

off filters).

Figure 7. E9322A and E9326A error in peak-to-average measurements for a two-tone input (high, medium, low and

off filters).