Specifications
Power Meter Supplemental Characteristics
1-8 HP EPM-441A/442A Service Guide
Table 1-3: Power Sensor Specifications±
Power Sensor Zero Drift
1
1. Within 1 hour after zero set, at a constant temperature, after a 24
hour warm-up of the power meter.
Measurement Noise
2
2. The number of averages at 16 (for normal mode) and 32 (for x2 mode),
at a constant temperature, measured over a 1 minute interval and 2
standard deviations. For HP ECP-series power sensors the
measurement noise is measured within the low range. Refer to the
relevant power sensor manual for further information.
HP 8481A <±10 nW <110 nW
HP 8481B <
±10 µW <110 µW
HP 8481D <
±4pW <45 pW
HP 8481H <
±1 µW <10 µW
HP 8482A <
±10 nW <110 nW
HP 8482B <
±10 µW <110 µW
HP 8482H <
±1 µW <10 µW
HP 8483A <
±10 nW <110 nW
HP 8485A <
±10 nW <110 nW
HP 8485D <
±4pW <45 pW
HP R8486A <
±10 nW <110 nW
HP R8486D <
±6pW <65 pW
HP Q8486A <
±10 nW <110 nW
HP Q8486D <
±6pW <65 pW
HP W8486A <
±40 nW <450 nW
HP 8487A <
±10 nW <110 nW
HP 8487D <
±4pW <45 pW
HP ECP-E18A
<± 15 pW <70 pW
HP ECP-E26A
<± 15 pW <70 pW
4402serv.book Page 8 Monday, March 11, 2002 11:34 AM
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