U2021XA Datasheet, PDF (6/20 Pages) Keysight Technologies – U2020 X-Series USB Peak and Average Power Sensors

06 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
Performance Specifications
Specification definitions
There are two types of product
specifications:
–– Warranted specifications are
specifications which are covered by
the product warranty and apply over
a range of 0 to 55 °C unless otherwise
noted. Warranted specifications
include measurement uncertainty
calculated with a 95% confidence
–– Characteristic specifications are
specifications that are not warranted.
They describe product performance
that is useful in the application of
the product. These characteristic
specifications are shown in italics.
Characteristic information is representative
of the product. In many cases, it may also
be supplemental to a warranted specifica-
tion. Characteristics specifications are
not verified on all units. There are several
types of characteristic specifications. They
can be divided into two groups:
One group of characteristic types describes
‘attributes’ common to all products of
a given model or option. Examples of
characteristics that describe ‘attributes’
are the product weight and ’50-Ω input
Type-N connector’. In these examples,
product weight is an ‘approximate’ value
and a 50-Ω input is ‘nominal’. These two
terms are most widely used when describing
a product’s ‘attributes.’
The second group describes `statistically’ the
aggregate performance of the population of
products. These characteristics describe
the expected behavior of the population
of products. They do not guarantee the
performance of any individual product.
No measurement uncertainty value is
accounted for in the specification. These
specifications are referred to as `typical.’
Conditions
The power sensor will meet its specifica-
tions when:
–– Stored for a minimum of two hours
at a stable temperature within the
operating temperature range, and
turned on for at least 30 minutes
–– The power sensor is within its recom-
mended calibration period, and
–– Used in accordance to the information
provided in the User’s Guide.
U2020 X-Series USB Power Sensors Specifications
Key specifications
Frequency range
U2021XA
50 MHz to 18 GHz
U2022XA
50 MHz to 40 GHz
Dynamic power range
Normal mode
–35 dBm to 20 dBm (≥ 500 MHz)
Average only mode ^1,2
–30 dBm to 20 dBm (50 MHz to 500 MHz)
–45 dBm to 20 dBm
Damage level
23 dBm (average power)
Rise/fall time
30 dBm (< 1 μs duration) (peak power)
≤ 13 ns ³
Maximum sampling rate
80 Msamples/sec, continuous sampling
Video bandwidth
≥ 30 MHz
Single-shot bandwidth
Minimum pulse width
Average power measurement accuracy
≥ 30 MHz
50 ns ⁴
U2021XA
≤ ± 0.2 dB or ± 4.5% ⁵
U2022XA
≤ ± 0.3 dB or ± 6.7%
Maximum capture length
1 s (decimated)
1.2 ms (at full sampling rate)
Maximum pulse repetition rate
10 MHz (based on 8 samples/period)
Connector type
U2021XA
N-type (m)
U2022XA
2.4 mm (m)
1.  Internal zeroing, trigger output, and video output are disabled in average only mode.
2.  It is advisable to perform zeroing when using the average path for the first time after power on, significant temperature changes, or long periods
since the last zeroing. Ensure that the power sensor is isolated from the RF source when performing external zeroing in average only mode.
3.  For frequencies ≥ 500 MHz. Only applicable when the Off video bandwidth is selected. Add 5 ns to rise/fall time specifications for acquisitions
smaller than 137.5 µs.
4.  The Minimum Pulse Width is the recommended minimum pulse width viewable, where power measurements are meaningful and accurate, but not
warranted.
5.  Specification is valid over a range of –15 to +20 dBm, and a frequency range of 0.5 to 10 GHz, DUT Max. SWR < 1.27 for the U2021XA, and a
frequency range of 0.5 to 40 GHz, DUT Max. SWR < 1.2 for the U2022XA. Averaging set to 32, in Free Run mode.