Datasheet

Page 4
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Time selectivity in average mode with variable aperture duration
The X-Series power sensor offers a new feature called average mode time selectivity, whereby
users are able to configure the aperture duration of measurement capture with reference to
immediate trigger or external trigger. The aperture duration can be set from 20 µs to 200 ms
with a resolution of 100 ns, a resolution low enough to cover any radio format.
This new feature allows users to control which portions of the waveform to be measured, giving
the same results as time-gated power measurements made in the conventional normal/peak
mode. The key benefits of this feature is that it enables the sensor to measure both average and
time-selective average power measurements across the full 96 dB dynamic range, and offers
real time measurements of up to 50,000 readings per second. This is a significant improvement
when compared to conventional power sensors; a conventional sensor’s time gated power
dynamic ranges is typically clipped at around 50 dB with maximum speed of 1000 readings per
second.
Internal zero and calibration
Save time and reduce measurement uncertainty with the internal zero and calibration function.
Each X-Series power sensor comes with technology that integrates a DC reference source
and switching circuits into the body of the sensor so you can calibrate the sensor while it
is connected to a device-under-test. This feature removes the need for connection and
disconnection from an external calibration source, speeding up testing and reducing connector
wear and tear.
This internal zero and calibration function allows continuous long distance and remote
measurements by maintaining the accuracy of the sensor, and is useful in manufacturing and
automated test environments where each second and each connection counts.
Built-in trigger in and out
An external trigger enables accurate triggering of low level signals close to the sensor’s noise
floor. The X-Series power sensor come with built-in trigger in/out connection, allowing you
to connect an external trigger signal from a signal source or the device-under-test in order
to achieve precise triggering timing. Once the trigger output is enabled, a TTL trigger output
signal will be generated on every triggered measurement. The built-in trigger in and out is
particularly useful when users need to synchronize the measurement acquisition of a series of
daisy-chain power sensors.
Figure 2. The external trigger input and output ports on the U2044XA.