Atec Agilent-U2000 User Manual
Agilent U2000 Series USB
Power Sensors
Data Sheet
The compact, low-cost
alternative to conventional
power measurement solutions
Why Agilent’s Power Meters and Sensors?
Reliable, high-performing solutions
Every power meter and sensor from Agilent consistently delivers great results.
A sure investment for many years to come
Code-compatibility between power meters reduces the need for re-coding. Not
only that, all Agilent power meters are backward-compatible with most legacy
power sensors.
One specific application: One right solution
Agilent offers a wide selection of power meters and sensors for practically
all application needs—wireless communications, radar pulse measurements,
component test, and more.
Global network support
No matter where you are, Agilent is committed to giving you the 24-hour
support you need regarding our products, applications, or services.
Agilent’s power meters have long been
recognized as the industry standard for
RF and microwave power measurements.
2
Compact Solutions for Testing Today’s RF and Microwave
Communication Systems
For installation and
maintenance of base stations
• Lightweight and rugged
• Simple set-up and usage
• Portable with low power
consumption
For production testing of
wireless components
• Compact build saves rack space
• Simple set-up and usage
• Wide dynamic and frequency
ranges
For R&D of wireless
components
• Compact build saves bench space
• Simple set-up and usage
• Wide dynamic and frequency
ranges
• Wide dynamic and frequency
ranges
• Quick and easy testing with large
display of readings
• Internal trigger eliminates the
problem for applications that do
not have external trigger signal
• Trace display capability enables
easy gate setup
• Fast reading speed
• Internal zeroing reduces test time
and sensor wear-and-tear
• Quick and easy multiple channels
testing with simultaneous display
of readings, limits and alerts
• Seamless integration to system
with industry-standard SCPI
• Internal trigger eliminates the
problem for tests that do not have
external trigger signal
• Trace display capability enables
easy trigger level and gate setup
• High accuracy
• Advanced troubleshooting of
designs with simultaneous display
of multiple readings, measurement
math and data recording
• Internal trigger eliminates the
problem for applications that do
not have external trigger signal
3
Introducing the U2000 Series USB Power Sensors
The U2000 Series enable simpler,
lower-cost power measurements
versus conventional power meter and
sensor combinations. Now with nine
high-performance models, the U2000
Series USB power sensors offer compact, high-performance solutions for
today’s CW and modulated signals.
Key features
• Compact, lightweight solutions
• Quick, simple set-up
• High accuracy, high power
• Internal zeroing capability
• Fast reading speed
• Wide frequency range: 9 kHz
to 26.5 GHz (sensor option
dependant)
• Wide dynamic range: –60 to
+44 dBm
• Support internal and external
trigger measurements*
• Trace display capability
enables easy trigger level and
gate setup for burst signals
• Allows remote measurements
beyond cable length
• Enables monitoring of
more than 20 channels
simultaneously
• Converts select Agilent
instruments to power meters
• Feature-packed software
provides various capabilities
for easy testing and analysis
• Average power measurements
of CW and modulated signals,
including GSM, EDGE, WLAN
and WiMAX
* Except U2004A model
TM
Compact “power meters”,
simple set-up
The U2000 Series are standalone
sensors. That means they essentially
operate like power meters, just in
smaller forms. No reference calibrator is required. The fact that each
sensor draws minimal power from a
USB port—and that it doesn’t need
additional triggering modules or
power adaptors to operate—makes
it more portable, especially for base
station testing. Setting up is easy:
just plug it to the USB port of your
PC or laptop—or even select network
or handheld spectrum analyzer—and
start your power measurements.
The figure below illustrates the very
simple, straightforward setup of the
U2000 Series.
USB sensor
DUT
High accuracy
Each U2000 Series sensor provides
excellent linearity, SWR and uncertainty specifications, so you can be
confident in every measurement you
make.
Wide range, high power
The U2000 Series’ dynamic range
spans across a wide 80 dB, taking on
high power up to +44 dBm.
Remote monitoring and tests
With the U2000 Series sensor
plugged to a networked USB hub,
you can conveniently monitor power
measurements of an antenna tower
from the control room, beyond the
limits of USB cable lengths.
Trigger signal
4
Introducing the U2000 Series USB Power Sensors (continued)
Faster production testing of
multiple channels
The U2000 Series’ fast measurement
speed helps reduce test time. This,
coupled with the capability to enable
monitoring of more than 20 channels
simultaneously, is an advantage in
the production line where efficiency
is of utmost priority.
The U2000 Series has both internal
and external zeroing capabilities.
With internal zeroing, high isolation
switches in the sensor are opened to
isolate the sensor from the deviceunder-test (DUT) it is connected to.
As such, you don’t need to power-off
the DUT or disconnect the sensors.
This speeds up testing and reduces
sensor wear-and-tear.
No manual input of calibration data
is required. All calibration factors,
as well as temperature and linearity
corrections, are stored in the sensors’
EEPROM, auto-downloaded at
calibration.
Often times, you’d need to automate
your tests. The U2000 Series sensors
are well-equipped for seamless integration to your system with industrystandard SCPI compatibility. They
also come with built-in triggering
capability to allow receipt of external
triggers from other instruments.
Transform your signal generators and spectrum analyzers into
accurate power meters
You could literally have a power meter next to you—or instead, turn your Agilent
MXG signal generator or N9340A/B handheld spectrum analyzer into a power
meter for accurate power measurements. Even with the U2000 connected, you
can switch between power measurements and the device’s original function at
any time. You can also use the U2000 with your Agilent PNA network analyzer
for source power calibration.
Intuitive power analysis software
The N1918A Power Analysis Manager software not only displays measurements
with the U2000 Series, it also provides various features and functions to help
you monitor and troubleshoot signals efficiently and effectively.
Multiple display types
1
1. Software capability differs between the two
versions of the software: Power Panel and
Power Analyzer. Please refer to page18 for
detailed comparison.
Multiple channel list and measurement math
Data recording with limit and alert settings
Min/Max readings
5
1
Take a Closer Look
Built-in triggering port for
synchronization with external
instruments or events
Small and lightweight build
LED indicator for PC communication
Secure locking mechanism
USB 2.0-compliant cable
for connection to PC or
other instruments
Diode-based sensors frequently
rely on the application of correction
factors to extend their dynamic range
beyond their square-law region, typically in the range of –70 to –20dBm.
While this technique achieves
measurement of CW signals over
a wide dynamic range, it fails to do
so for modulated signals when the
signal level is above the square-law
region. Modulated signals must be
padded down, with their average and
peak power levels within the diode
square-law region, for accurate average power measurement.
The U2000 Series USB power sensors
are true-average, wide-dynamic-range
RF/microwave power sensors,
based on a dual-sensor diode pair/
attenuator/diode pair topology as
proposed by Szente et. al. in 19901.
The simplified block diagram shown
here illustrates this technique.
Low Sense
RF in
Low Sense
High Sense
High Sense
This technique ensures diodes in the
selected signal path are kept in their
square law region—with output current and voltage proportional to input
power. The diode pair/attenuator/
diode pair assembly can then yield
the average of complex modulation
formats across a wide dynamic range,
irrespective of signal bandwidth.
+
The dual-range Modified Barrier
Integrated Diode (MBID)2 package
–
incorporates diode stacks in place of
single diodes. This further improves
+
measurement accuracy of high-level
signals with high crest factors with-
–
out incurring damage
3
to the sensor.
Implementation of both techniques in
the U2000 Series USB sensors enable
effective average power measurements of a wide range of signals,
including multitone and spread spectrum signals used in CDMA, W-CDMA
and digital television sytems.
1. US Patent #4943764, assigned to Hewlett-Packard Company
2. November 1986 Hewlett-Packard Journal pages 14-2, “Diode Integrated Circuits for Millimeter-Wave Applications”
3. Refer to “Maximum Power” on page 9 for maximum power handling specifications
6
Specifications
Specifications contained in this chap-
Frequency and power ranges
ter are valid ONLY after proper calibration of the power sensor and apply to
continuous wave (CW) signals unless
otherwise stated. The recommended
calibration interval for this product is
one year. Specifications apply over a
temperature range 0 to +55 °C unless
otherwise stated. Specifications
quoted over a temperature range
of 25 °C ± 10 °C apply to a relative
humidity of 15% to 75% and conform
to the standard environmental test
conditions. Specifications are valid
after a 30-minute warm-up period.
Model Frequency range Power range Maximum power
U2000A 10 MHz to 18 GHz
U2001A 10 MHz to 6 GHz
U2002A 50 MHz to 24 GHz
U2004A 9 kHz to 6 GHz –60 to +20 dBm
U2000B 10 MHz to 18 GHz
U2001B 10 MHz to 6 GHz
U2000H 10 MHz to 18 GHz
U2001H 10 MHz to 6 GHz
U2002H 50 MHz to 24 GHz –50 to +30 dBm
–60 to +20 dBm
–30 to +44 dBm
–50 to +30 dBm
+25 dBm avg, 20 VDC
+33 dBm pk, < 10 µs
+25 dBm avg, 5 VDC
+33 dBm pk, < 10 µs
+45 dBm avg, 20 VDC
+47 dBm pk, 1 µs
+33 dBm avg, 20 VDC
+50 dBm pk, 1 µs
+33 dBm avg, 10 VDC
+50 dBm pk, 1 µs
Supplemental characteristics, shown
in italics, are intended to provide useful information with regard to applying the power sensors in that they
contain typical, but non-warranted
performance parameters. These
characteristics are shown in italics
or denoted as “typical”, “nominal” or
“approximate”.
Measurement speed
Normal: 20 readings/s
x2: 40 readings/s
Fast: 110 readings/s
Buffered (50 readings):
1000 readings/s
The U2000 Series USB sensors have
two measurement modes:
Average only mode (default mode):
optimized for wide dynamic range. In
this measurement mode, a trigger can
be controlled externally via TTL input.
Normal2 mode: used for making average power measurement in a defined
time interval (time-gated measurement) with reduced dynamic range.
A trigger can be derived from an RF
signal (internal trigger) or controlled
externally via TTL input (external
trigger).
1. The 1000 reading/s is the derived measurement speed from the first 50 readings in buffered mode. The maximum number of measurements that can be obtained in one
second is 250 readings in buffered mode.
2. Not applicable for U2004A.
1
Maximum SWR
Maximum SWR
Model Frequency range
10 to 30 MHz
30 MHz to 2 GHz
U2000A
U2001A
U2002A
U2004A
U2000B
U2001B
U2000H
U2001H 10 MHz to 6 GHz 1.15 1.17
U2002H
2 to 14 GHz
14 to 16 GHz
16 to 18 GHz
10 to 30 MHz
30 MHz to 2 GHz
2 to 6 GHz
50 MHz to 2 GHz
2 to 14 GHz
14 to 16 GHz
16 to 18 GHz
18 to 24 GHz
9 kHz to 2 GHz
2 to 6 GHz
10 MHz to 2 GHz
2 to 12.4 GHz
12.4 to 18 GHz
10 MHz to 2 GHz
2 to 6 GHz
10 MHz to 8 GHz
8 to 12.4 GHz
12.4 to 18 GHz
50 MHz to 8 GHz
8 to 12.4 GHz
12.4 to 18 GHz
18 to 24 GHz
(25 °C ± 10 °C)
1.15
1.13
1.19
1.22
1.26
1.15
1.13
1.19
1.13
1.19
1.22
1.26
1.30
1.13
1.19
1.12
1.17
1.24
1.12
1.17
1.15
1.25
1.28
1.15
1.25
1.28
1.30
Maximum SWR
(0 °C to 55 °C)
1.21
1.15
1.20
1.23
1.27
1.21
1.15
1.20
1.15
1.20
1.23
1.27
1.30
1.15
1.20
1.14
1.18
1.25
1.14
1.18
1.17
1.26
1.29
1.17
1.26
1.29
1.31
7
Specifications (continued)
Typical SWR for U2000A sensor
(25 °C ± 10 °C)
Typical SWR for U2001A sensor
(25 °C ± 10 °C)
Typical SWR for U2002A sensor
(25 °C ± 10 °C)
8
Loading...