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Sensor control and processing is provided by an embedded processor with
Digital Signal Processing (DSP) capability which is supported by a 64 MB
SDRAM. The available processing power enables the implementation of
correction algorithm such as linearity correction, calibration factor,
temperature compensation algorithm and internal zeroing algorithm. The
correction factors for the sensors are stored in a 3 MB Flash memory. In
the temperature compensation algorithm and internal zeroing algorithm
implementation, the processor continuously monitors sensor temperatures
using a thermistor which is located in the vicinity of the diode sensing
element as shown in
TTL enables the sensor to synchronize with events. The U2000 Series
supports high data rate transfer of 480 Mb/s through the Universal Serial
Bus (USB) connectivity which is USB- TMC compliance.
External zeroing is performed similar to other power sensors - the RF
power is removed from the sensor by the user and then the sensor is
zeroed. Internal zeroing is a new type of zeroing whereby the RF power can
be left connected to the sensor while it is being zeroed. The power sensor
will remove the RF power from the diode sensor internally in the sensor.
During the external zeroing process, the data from the front end circuitry
which includes the RF diode sensing element, signal conditioning, and data
acquisition circuit will be acquired. The zero information is then used. Do
not apply any RF/microwave signals to the bulkhead during external
zeroing process. Any RF/microwave signals pick- up by the diode sensor
during the external zeroing will be considered as part of the noise.
During internal zeroing process, high isolation switches are opened in the
sensor to isolate the diode sensor from the electronic circuitry. With the
available processing power from the embedded DSP in the power sensor,
the internal zeroing algorithm is applied to the internal zero data. The
internal zeroing process simplifies the product operation by removing the
circuitry noise without requiring the RF signal to be removed from the
power sensor. Hence, internal zeroing is able to provide the convenience of
performing a zero with the RF/microwave signal present.
U2000 Series Operating and Service Guide
Figure 1-
3. The trigger input port which is based on
Getting Started
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