Atec Agilent-8480 Series - Manual (Page 3)

3
Supplemental Characteristics
Power Reference
Frequency: 50 MHz nominal.
SWR: 1.05 maximum.
Connector: Type N (f), 50 ohms.
Measurement Speed
Three measurement speed modes, over the GPIB, are
available as shown, along with the typical maximum
measurement speed for each mode.
With the E4418B power meter:
Normal: 20 readings/second
x2 : 40 readings/second
Fast: 200 readings/second
With the E4419B, the measurement speed is reduced, for
example, with both channels in FAST mode, the typical max-
imum measurement speed is 100 readings/second.
Fast mode is for E-series sensors only.
Maximum measurement speed is obtained using binary out-
put and in Free Run trigger mode.
Zero Drift of Sensors: Sensor dependent, refer to Table 2.
For E9300 sensors, refer to Table 12 for complete data.
Measurement Noise: Sensor dependent, refer to Table 2
and Table 3. For E9300 sensors, refer to Table 12.
Effects of Averaging on Noise: Averaging over 1 to 1024
readings is available for reducing noise. Table 2 provides the
Measurement Noise for a particular sensor with the number
of averages set at 16 (for Normal mode) and 32 (for x2
mode). Use the Noise Multiplier, for the appropriate mode
(Normal or x2) and number of averages, to determine the
total Measurement Noise value.
Example:
8481D Power Sensor, Normal mode, Number of
Averages = 4.
Measurement Noise calculation:
(<45 pW x 2.75) = <121 pW.
Table 2
1. Within 1 hour after zero set, at a constant temperature,after a 24-hour warm-up of the
power meter.
2. The number of averages at 16 for Normal mode and 32 for x2 mode, at a constant
temperature, measured over a one minute interval and two standard deviations. For
E-series sensors, the measurement noise is measured within the low range.
Refer to the relevant sensor manual for further information.
3. Specification applies to the Low Power Path, 15% to 75% relative humidity.
Table 3
Model Zero Drift (1) Measurement Noise (2)
8481A, 8482A, <±10 nW <110 nW
8483A, 8485A,
8487A, R8486A,
Q8486A,
8481B, 8482B <±10
µ
W <110
µ
W
8481D, 8485D, <±4 pW <45 pW
8487D
8481H, 8482H <±1
µ
W <10
µ
W
R8486D, Q8486D <±6 pW <65 pW
V8486A, W8486A <±40 nW <450 nW
E4412A, E4413A <±15 pW <70 pW
E9300A, E9301A, <±150 pW <700 pW
E9304A 3
E9300B, E9301B 3 <±150 nW <700 nW
E9300H, E9301H 3 <±1.5 nW <7 nW
Number of Averages 1 2 4 8 16 32 64 128 256 512 1024
Noise Multiplier 5.5 3.89 2.75 1.94 1 0.85 0.61 0.49 0.34 0.24 0.17
(Normal mode)
Noise Multiplier 6.5 4.6 3.25 2.3 1.63 1 0.72 0.57 0.41 0.29 0.2
(x2 mode)