Features
Agilent U2000 Series USB power sensors make setup fast and simple by providing plug-and-play USB connectivity, and by eliminating the need for a separate power meter. The U2000 Series is an affordable solution that doesn’t compromise on performance in multi-channel average power measurements. With the U2000 Series, you get what you need— simple set up, great sensing.
Key Specifications
- Frequency range of 10 MHz to 6 GHz
- Wide dynamic range of -60 to +20 dBm
- Internal zeroing capability to eliminate external calibration
- High measurement speed of up to 250readings/second
Display power measurements on a PC or other Agilent’s instruments
The Agilent U2000 Series USB power sensors are average, dynamic wide-range power sensors that can be used with a PC or any selected Agilent USB-based instrument. With internal zeroing, there is no need to disconnect the sensor or power off the device-under-test (DUT). The U2000 Series does not require any 50 MHz reference signal calibration, thus allowing factory calibration to ensure measurement accuracy.
All the specifi cations provided in this data sheet are valid ONLY after proper calibration of the power sensor and apply to continuous wave (CW) signals unless otherwise stated.
The specifi cations are valid for a temperature range from 0 °C to +55 °C unless otherwise stated. Specifi cations provided for a temperature of 25 °C ± 10 °C are valid for a relative humidity range of 15% to 75% and conform to the standard environmental test conditions.
Why Zeroing Is Important For U2000 Series USB Power Sensor?
Zeroing a power sensor is performed to reduce zero offset and noise impact to improve RF power measurement accuracy. The U2000 Series USB power sensor has two types of zeroing, namely the Internal Zeroing (INT) and External Zeroing (EXT).
When performing External Zeroing, the RF signal source (typically signal output from a device under test) should be turned off or disconnected from the power sensor input, then the power sensor is zeroed. For Internal Zeroing, the RF signal source can be turned on or left connected to the power sensor input. The power sensor will isolate the RF signal source from the diode sensor before zeroing.
Users are recommended to perform external zeroing for input signals power below -30 dBm to obtain a maximum degree of accuracy in their measurements.1
External Zeroing can be used for RF signal level that falls into the power dynamic range (from –60 dBm to 20 dBm). Figure 1 shows the External Zeroing setting in the N1918A Power Panel.
1 The specifi cations stated in this data sheet are applicable for Internal Zeroing with power ranging from –30 dBm to +20 dBm unless otherwise specified.
Switching Point
The U2000 Series USB power sensors have two paths, a low power path covering –60 dBm to –10 dBm, and a high power path covering –10 dBm to +20 dBm. The power meter automatically selects the appropriate power level path. To avoid unnecessary switching when the power level comes close to the –10 dBm point, a Switching Point Hysteresis is added. This hysteresis causes the low power path to remain selected until approximately –9.5 dBm has been reached.
When the power level increases above –9.5 dBm, the high power path
will be selected. The high power path remains selected until approximately –10.5 dBm has been reached. When the power level decreases below –10.5 dBm, the low power path will be selected.
Switching point linearity: Typically <±0.5% (<±0.02 dB) Switching point hysteresis: Typically 0.5 dB
Calibration Factor (CF) and Reflection Coefficient (Rho)
Calibration Factor (CF) and Reflection Coefficient (Rho) data is provided in the Certifi cate of Calibration (CoC) that comes with the purchase of U2000 Series USB power sensors. This data is unique to each sensor. If you have more than one sensor, you should match the serial number on the CoC with the serial number on the power sensor that you are using.
The CF corrects the frequency response of the sensor.
The Reflection Coefficient (Rho, or r) relates to the SWR based on the following formula:
SWR = (1 + Rho)/(1 - Rho)
Maximum uncertainties of the CF data are listed in the following tables.
As the U2000 Series USB power sensors have two independent measurement paths (high and low power paths), there are two calibration factor uncertainty tables for each sensor. The uncertainty analysis for the calibration of the sensors is done in accordance with the ISO Guide. The uncertainty data reported on the calibration certifi cate is the expanded uncertainty with a 95% confi dence level and a coverage factor of two.
General Characteristics
This instrument is designed for indoor use only. The table below shows the general requirements for the U2000 Series USB power sensors.
Temperature 0 °C to +55 °C (operating)
–30 °C to +70 °C (non-operating)
Relative Humidity Operating up to 95% at 40 °C (non-condensing)
Non-operating up to 90% at 65 °C (non-condensing)
Altitude Operating up to 4,600 metres (15,000 feet)
Non-operating up to 4,600 metres (15,000 feet)
Pollution Degree 2
Net Weight U2000/1/4A : 0.262 kg (0.6 lb)
U2002A : 0.226 kg (0.5 lb)
Dimensions (U2000/1/4A)
Length: 163.75 mm (6.4 in)
Width: 46.00 mm (1.8 in)
Height: 35.90 mm (1.4 in)
Dimensions (U2002A)
Length: 134.37 mm (5.3 in)
Width: 46.00 mm (1.8 in)
Height: 35.90 mm (1.4 in)
Storage Environment
The sensor should be stored in a clean, dry environment
Storage Temperature
–30 °C to +70 °C
Agilent N1918A Power Analysis Manager
The Agilent N1918A Power Analysis Manager is a PC-based application software running on Microsoft® Windows® platforms that is targeted to extend the capabilities of U2000 Series USB power sensors. The N1918A is a suite of software applications that comprises a basic version, which contains a standard graphical user interface (GUI), and an advanced version as an optional software license, which provides for advanced pulse analyses, multi-channel power measurements, statistical analyses, and a recording function. Users can use these software applications to track problems at any stage of their design process, from simulation to the fi nal prototype. The software is fl exible and can accept data from multiple front ends.
The following section contains the specifi cations for using the Agilent N1918A
Power Analysis Manager with the U2000 Series USB power sensors.
Enhanced visualization with larger and more fl exible display formats
Powerful graph functions
Display multi-channel power measurements (with more than 10 displays on one window)
Convenient data logging and storing up to seven days
Time-saving options to save and restore instrument settings
Measurement limit and alert function optimized for remote operation
Quick and easy application screen printing option
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