Atec Agilent-E9320 Series - Manual (Page 8)

8
Sensor linearity
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.
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.
Table 6a. Power sensor linearity, normal mode
(upper and lower range).
Sensor model Temperature Temperature
( 25 ± 10 °C) (0 to 55 °C)
E9321A and E9325A ±4.2% ±5.0%
E9322A and E9326A ±4.2% ±5.0%
E9323A and E9327A ±4.2% ±5.5 %
Table 6b. Power sensor linearity, average only mode
(upper and lower range).
Sensor model Temperature Temperature
( 25 ± 10 °C) (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 %
Table 6c. Additional linearity error (normal and average only modes).
Sensor model Temperature Temperature
( 25 ± 10 °C) (0 to 55 °C)
E9321A and E9325A ±1.0% ±1.0%
E9322A and E9326A ±1.0% ±1.5%
E9323A and E9327A ±1.0% ±2.0 %
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 to –10 to 0 to +10 to
–20 dBm –10 dBm 0 dBm +10 dBm +20 dBm
Measurement ±0.9% ±0.8% ±0.65% ±0.55% ±0.45%
uncertainty
Figure 5. Relative mode power measurement linearity with an
EPM-P series power meter, at 25 °C (typical).