3 Specifications and Characteristics
48 U2000 Series Operating and Service Guide
Power Accuracy
This specification is valid only after zeroing and calibration of the power
sensor at ambient environmental conditions.
Tab le 3- 1 Average only Mode Power Accuracy
1
(with exclusions)
Tab le 3- 2 Normal Mode Power Accuracy
1,2
(with exclusions)
With conditions as follows:
• After zeroing
3
and 30 minutes of power- on warm- up
• Number of averages = 1024
Model Power Level
Accuracy
25 °C ±10 °C
Accuracy
0 °C to 55 °C
U2000/1/2/4A –60 dBm to +20 dBm ±3.0% ±3.5%
U2000/1/2H –50 dBm to +30 dBm ±4.0% ±5.0%
U2000/1B –30 dBm to +44 dBm ±3.5% ±4.0%
1 The accuracy is essentially a combination of linearity, instrumentation accuracy, and traceability to
absolute accuracy at 50 MHz, 0 dBm. Note: mismatch uncertainty, cal-factor uncertainty, and
power level dependent terms (zero set, drift, and noise) are excluded in this specification and
specified elsewhere in this guide.
Model Power Level
Accuracy
25 °C ±10 °C
U2000/1/2A –30 dBm to +20 dBm
±
4.0%
U2000/1/2H –20 dBm to +30 dBm
±
5.0%
U2000/1B 0 dBm to +44 dBm
±
4.5%
2 The accuracy for –7 dBm to +1 dBm (U2000/1/2A), +3 dBm to +11 dBm (U2000/1/2H), and +23
dBm to +31 dBm (U2000/1B) power level will be dominated by zero set and measurement noise.
For overall accuracy, refer to the measurement uncertainty calculator which is available on the
Keysight Technologies Web site.
3 It is strongly advisable to perform external zeroing on the U2000 Series USB power sensor for
power measurement level below –30 dBm (U2000/1/2A), –20 dBm (U2000/1/2H), and 0 dBm
(U2000/1B) for accurate measurements. During the external zeroing process, the RF input signal
must be switched off or the device-under-test disconnected from the U2000 Series USB
power sensor.
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