Faster measurement speed and greater measurement accuracy
Skip the complicated setup and go
straight to making measurements
with Agilent 8990B peak power
analyzer. The instrument offers faster
measurement speed and greater
measurement accuracy in key applications such as radar pulse analysis
and wireless pulse measurement.
Designed with both ease of use and
high performance in mind, the 8990B
peak power analyzer does more than
just measure and analyze – it saves
you time and effort, letting you focus
on the important details.
Ease of use
8990B peak power analyzer is built for ease of use: the instrument is easy to set,
easy to trigger and easy to measure pulse measurements with.
Setting Set amplitude and time scale settings quickly with dedicated knobs
and buttons, while the Autoscale function automatically displays
waveforms scaled to the display. The function is accessible through a
single touch button.
Trigger Trigger the right pulse signal in three simple steps. Simply select the
trigger source, the trigger edge and the trigger level, and the peak
power analyzer will display the appropriate pulse signals.
Measure Analyze a full range of parameters with 15 pulse parameter
measurements, all pre-defined and executed automatically in two
easy steps via the front panel touchscreen.
Additional features such internal zero and calibration and touchscreen capability
make setup and data analysis both efficient and convenient, while a familiar button layout cuts the learning time needed to master using the instrument.
2
Performance
8990B peak power analyzer is rich with a host of key performance specifications,
dedicated to give you accurate and more detailed pulse measurements, faster.
Accuracy Measure RF power measurements with less error; 8990B has an
overall accuracy rate of 0.2 dB.
DetailView pulses in greater image detail with the large 15-inch XGA color display and get the high resolution needed to detect abnormalities in
a signal trace with the 8990B’s sampling rate of 100 MSample/s
(real time sampling) and 1 GSample/s (ETS mode).
SpeedAutomatically execute pulse droop measurements for repetitive amplified pulse signals and delay measurement to detect the first
pulse of the traces. The instrument’s screen will instantly display
the results.
And when combined with the N1923A/N1924A wideband power sensors, the
8990B achieves 5 nanosecond rise time/fall time – the fastest rise time/fall time
in the peak power measurement market.
3
8990B Peak Power Analyzer Key Features
• Capture short radar pulses
accurately with a 5 nanosecond
overall rise time/fall time – the
fastest rise time/fall time in the
peak power measurement market
– when the 8990B peak power
analyzer is paired with the either
the N1923A or N1924A wideband
power sensor.
• A high sampling rate of 100
MSa/s lets you measure samples
faster and view trace displays in
high resolution.
• Analyze a full range of parameters
with 15 pulse characterization
measurements, including duty
cycle, rise time, pulse top, pulse
width, PRI and PRF.
• Verify design problems quickly
with a 15 inch XGA color display
that is capable of simultaneously
displaying four channel results for
more image detail, and manipulate
data directly with a few touches of
your finger with the touchscreen
capability.
• Save time and eliminate
inaccurate readings with the
internal zero and calibration
function.
• Continuously trigger and capture
up to 512 pulses with the new
multi-pulse measurement feature.
• Color coded channels allow you to
pick out the channel data points
of interest at a glance.
• Easily calculate the PowerAdded Efficiency (PAE) of power
amplifiers, and display instant PAE
traces on the 8990B’s display.
• Backwards compatibility with
P-series sensors and U2000 series
USB power sensors widens your
sensor options and offers you an
additional channel to the current
four when a USB power sensor
is connected. Download and
install the N1918A Power Analysis
Manager software to use the USB
power sensor with the 8990B.
4
Graphical User Interface Overview
Measurement screen
The main measurement screen is capable of displaying up to four traces: two
RF traces, and two video traces (the triggering signal). Results are shown in the
panel directly under the graphical window, with measurements displayed in the
same color as the channel it corresponds to. When a USB sensor is connected,
the results for this additional channel can be overlaid on the same graphical
window in compact mode, The main screen also features a soft panel key to the
side of the graphical window, which lists the 15 pulse characterization measurements for quick measurement analysis. Users can select these measurement
parameters via the touchscreen display, or by using the mouse.
Delay measurement
Users can perform delay measurements by pressing the Delay Measurement
button on the soft panel key. Two vertical markers will automatically detect the
first pulse of the traces. The time delay between the two traces will be displayed
in the measurement panel below the graphical window.
Droop measurement
The 8990B is the first peak power analyzer on the market that offers automated
Pulse Droop measurement, eliminating the need to manually manipulate the
horizontal markers to make this measurement. The Pulse Droop measurement is
accessible via the soft panel key, and measures the amplitude degradation of the
pulse top.
5
Spacing measurement
Easily measure the space between pulses when a long pulse train occurs. The
8990B allows users to select the starting pulse and the end pulse, a function
that is important in pulse block validation. R&D engineers may use this function
to detect potential abnormalities in certain pulse groups, and whether those
abnormalities are repeated in a long pulse train.
Zoom screen
The 8990B provides dual window zoom capability. When this function is enabled,
the top screen will display the original signal, while the bottom screen displays
the enlarged signal trace.
To focus and zoom in on a particular segment of the signal trace, use the white
zoom box to select the area of interest on the original signal trace. The measurement panel below will display the results of the selected signal segment. This
function provides R&D engineers the flexibility to focus on particular parts of the
signal and to obtain only the measurement results they need.
The dual zoom window capability allows users to observe the original trace
while focusing in on the selected signal segment instead of flipping between
screens or losing the original trace after zooming in on the segment.
Threshold/power display settings and erase memory
The 8990B allows users to change channel settings. The default threshold
setting is 90 % and 10%; however, users may change the reference levels to any
value. If a pulse has high overshoot in the traces, users can choose to reduce
the upper trace level to 80 % or 70 % to eliminate the overshoot signal’s impact
on the results. Users can also modify the trace level of two different signals for
the delay measurement according to what is the best reference level for the
individual signal.
Users can also change their settings to display power measurements in either
logarithmic or watts to help with easy result conversion or to match the results
to the traces in the graphical window.
For users in the aerospace and defense industry, 8990B offers several ways to
secure both data and measurement settings such as the memory sanitization
feature, a standard product feature in all Agilent equipment that will erase the
system’s setup and data results. Users can also opt for the removable hard drive
option, which switches the attached hard drive with a removable version so
users can remove data and settings together with the hard drive without worrying about information leaks.
6
Additional Features
Multi-pulse measurement
View, measure and analyze continuous pulse trains from power amplifier
modules or transmitters. The multi-pulse measurement feature allows continuously trigger and capture up to 512 pulses. This feature also adds pulse-to-pulse
measurement and histogram distribution graph capabilities to the 8990B, which
are crucial for testing RF and the pulse-to-pulse stability of power amplifiers and
transmitters.
Additionally, users can use the multi-pulse measurement feature to analyze
short pulse with long off time or amplitude droop across the pulse train, or
monitor the stability of the pulse shape (via the histogram graph functionality).
Power-Added Efficiency math function
Calculate the Power-Added Efficiency (PAE) of power amplifiers and display
instant PAE traces onscreen with the 8990B. Power-Added Efficiency, a typical
power analyze measurement, is a measure of the power conversion efficiency –
the percentage of DC power converted to RF power in the power amplifier – of
power amplifiers.
Reduce test costs and the number of test equipment needed with the 8990B; the
peak power analyzer measures RF power, voltage and current in a single solution
box. The 8990B’s two RF input channels allow users to measure the RF power
gain from the power amplifier; using a DC current probe, scope probe or differential probe, they can also measure the power amplifier’s voltage and current
through the analog video input channels. The 8890B’s PAE math function then
uses the measurements from the RF and analog video input channels to easily
determine the PAE of the power amplifier.
.
Adjustable ETS threshold for wider bandwidth measurement
Measure peak and peak-to-average of 802.11ac wide bandwidth signal accurately with the 8990B’s 160 MHz video bandwidth capability. The peak power
analyzer can execute power vs. time (PvT) measurements on an 80 MHz or
160 MHz 802.11ac signal by adjusting the ETS threshold according to the burst
length.
Users can also use the zoom function to analyze and measure the preamble
power of the 802.11ac burst signal.
7
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 specification. 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-ohm input Type-N connector’. In these examples,
product weight is an ‘approximate’ value and a 50-ohm input is ‘nominal’. These
two terms are most widely used when describing a product’s ‘attributes’.
Conditions
The power meter and sensor will meet its specifications 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 meter and sensor are within their recommended calibration
period, and
• used in accordance to the information provided in the User’s Guide.
8
Product Characteristics
The following specifications are applicable only when the N1923A/N1924A
wideband power sensors are used with the 8990B peak power analyzer. Using
the 8990B with other supported sensors might yield different results.
Power requirements
Operating environment
Non-operating conditions
Dimensions (W x D x H)
Weight
Sound pressure level
Electromagnetic
compatibility
• 100 V to 120 V (at 50 Hz - 60 Hz, 400 Hz)
• 100 V to 240 V (at 50 Hz - 60 Hz)
• Maximum power dissipated at 375 W
• Operating temperature from 5° C to 40° C
• Relative humidity up to 95% at 40 °C (non-condensing)
• Operating altitude up to 4000 m (12000 ft.)
• Operating random vibration at 5 Hz to 500 Hz, 10 min/axis, 0.21 g (rms)
• Non-operating temperature from –40° C to +70° C
• Relative humidity up to 90% at 65° C
• Non-operating altitude up to 4600 m (15000 ft.)
• Non-operating random vibration at 5 Hz to 500 Hz, 10 minutes/axis, 2.09 g (rms);
Resonant search at 5 Hz to 500 Hz, swept sine, 1 octave/minute, sweep rate at 0.5 g
(0 peak), 5 minutes resonant, dwell at 4 resonance/axis
430 mm (16.9 in) x 347 mm (13.7 in) x 330 mm (13.0 in)
• <16 kg (net)
• <23.5 kg (shipping)
• 45 dB
Complies with the essential requirements of the European (EC) Directives as follows:
• IEC 61326-2-1:2005/EN 61326-2-1:2006
• CISPR 11:2003/EN 55011:2007 (Group 1, Class A)
Safety
The product also meets the following EMC standards:
• Canada: ICES-1:2004
• Australia/New Zealand: AS/NZS CISPR 11:2004
Conforms to the following product specifications:
• EN61010-1: 2001/IEC 61010-1:2001
• CAN/CSA C22.2 No. 61010-1-04
• ANSI/UL std No. 61010-1-2004
9
8990B Peak Power Analyzer Specifications
Key specifications
RF input channels 2
Video input channels 2
Maximum real time sampling
Frequency range50 MHz to 40 GHz
Dynamic range–35 dBm to +20 dBm
Measurement unitlinear (Watt) or Log (dBm) selectable
Video bandwidth
Minimum pulse width
Maximum pulse repetition rate
160 MHz
50 ns
10 MHz
4
Input coupling50 Ω
Vertical scale• 0.01 dB/div to 100 dB/div in 1-2-5 sequence or any arbitrary scaling, user defined
• 1 uW/div to 1 kW/div in 1-2-5 sequence or any arbitrary scaling, user defined
Offset± 99 dBm with 0.01 dB resolution
ETS threshold500 ns, 1 µs, 2 µs, 5 µs, 10 µs
Video inputs (channels 2 & 3)
General characteristics
Video bandwidth
1 GHz
Input impedance50 Ω ± 2.5%, 1 MΩ ± 1% (11 pF typical)
Input coupling• 1 MΩ: AC (3.5 Hz), DC
• 50 Ω: DC
Vertical scale• 1 MΩ: 1 mV/div to 5 V/div in 1-2-5 sequence or any arbitrary scaling, user defined
• 50 Ω: 1 mV/div to 1 V/div in 1-2-5 sequence or any arbitrary scaling, user defined
DC gain accuracy± 2% of full scale at full resolution on channel scale ± 5 ˚C from cal temp
Offset accuracy ± (1.25% of channel offset +1% of full scale + 1 mV)
Maximum input voltage1 MΩ: 150V RMS or DC, CAT I
± 250 V (DC + AC) in AC coupling
Offset range
Vertical sensitivityAvailable offset
1 MΩ1 mV to < 10 mV/div
10 mV to < 20 mV/div
20 mV to < 100 mV/div
100 mV to < 1 V/div
1 V to 5 V/div
± 2 V
± 5 V
± 10 V
± 20 V
± 100 V
50 Ω± 12 div or ± 4 V, whichever is smallest
2
5
1. For RF input channel 1 and 4.
2. For video input channel 2 and 3
3. Specification applies only when the Off video bandwidth is selected
4. Video bandwidth tested by measuring peak-to-average on a two-tone
separation signal at +10 dBm, frequency set at 1 GHz. Test limit set at
2 dB roll off from the nominal 3 dB peak-to-average flatness graph.
5. 50 Ω input: Full scale is defined as 8 vertical divisions. Magnification is
used below 10 mV/div, full-scale is defined as 80 mV. The major scale
settings are 5 mV, 10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 500 mV, 1V.
1 MΩ input: Full scale is defined as 8 vertical divisions. Magnification is
used below 5 mV/div, full-scale is defined as 40 mV. The major scale settings are 5 mV, 10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V.
10
8990B Peak Power Analyzer Specifications (continued)
Time Base
Range 2 ns to 100 msec/div in 1-2-5 sequence or any arbitrary scaling, user defined
Delta time accuracy
Timebase accuracy± 1.4 ppm peak
Channel to Channel offset
Delay range± 1 s max
Trigger
Hardware trigger
Sweep modeAuto, triggered, single
Trigger modePostive and negative edge, pulse width (all channels)
Trigger sourceChannel 1, 2, 3, 4, AUX
Trigger level
Level range
Level resolution Channel 1 and 4: 0.01dB
Level accuracyChannel 1 and 4: ±0.5 dB (0.5 dB/ns slew rate in ETS mode)
Trigger delay
Delay range± 1.0 s max
Delay resolution
Trigger hold-off
Range1 µs to 1 s
Resolution
Vertical and horizontal markers
Resolutionminimum 1 ns
Sensor check source
Frequency
Power level
Signal type
Repetition rate
Connector type
SWR
Waveform measurement and math
Pulse measurement Rise time, fall time, minimum, average, peak, peak-to-average, duty cycle, PRI, PRF, off
Multi-pulse specifications
Maximum capture frame 512 (each channel 1 and channel 4)
Minimum pulse to pulse duration1 µs
Number of histogram bins20 (user adjustable)
Pulse to Pulse measurementCompare any two pulses from the captured frames
Sensor compatibility
N1921AP-Series wideband power sensor, 50 MHz to 18 GHz
N1922AP-Series wideband power sensor, 50 MHz to 40 GHz
N1923AWideband power sensor, 50 MHz to 18 GHz
N1924AWideband power sensor, 50 MHz to 40 GHz
Computer system and peripherals, I/O ports
Display
Display 15 inch color XGA TFT-LCD with touchscreen capability
Computer system and peripherals
Operating systemWindows 7 Embedded Standard
®
CPUIntel
System memory4 GB
Drives• ≥ 250 GB internal hard disk (option 800)
Peripherals• Optical USB mouse and compact keyboard supplied.
RS-232 (serial)COM1, printer and pointing device support
PS/2Two ports. Supports PS/2 pointing and input devices
USB 2.0 Hi-Speed• Three ports (front panel)
Dual-monitor video output15 pin XGA on side, full color output of scope waveform display or dual monitor
Auxiliary outputDC (± 2.4 V); square wave ~755 Hz with ~200 ps rise time
Trigger outOutput provides TTL compatible logic levels and uses a BNC connector
Time base reference output• 10 MHz, amplitude into 50 Ω, 800 m Vpp to 12.6 Vpp (4 dBm ±2 dB) if derived from
Time base reference input10 MHz, input Z = 50 Ω.
Remote programming
InterfaceLAN and USB 2.0 interface
Command languageSCPI
Core 2TM Duo CPU E8400 3 GHz microprocessor
• ≥ 250 GB removable hard disk (option 801)
• Supports any Windows compatible input device with a PS/2 or USB interface.
enabled remote control, e-mail on trigger, data/file transfers and network printing.
• Four ports (side panel)
• Allows connection of USB peripherals like storage devices and pinitng devices
while the peak power analyzer is turned on. One device port on the side.
video output
internal reference.
• Tracks external reference input amplitude ±1 dB if applied and selected.
Minimum, –2 dBm
Maximum, +10 dBm
12
N1923A/N1924A Wideband Power Sensor Specifications
Sensor
model
N1923A 50 MHz to
N1924A 50 MHz to
The N1921A/N1922A P-series wideband power sensors are compatible for use with the 8990B peak power analyzer.
Frequency
rangeDynamic rangeRise/fall timeDamage level
50 MHz to 10 GHz1.21.2
10 GHz to 18 GHz1.261.26
18 GHz to 26.5 GHz1.3
26.5 GHz to 40 GHz1.5
Sensor Calibration Uncertainty
Frequency band N1923AN1924A
50 MHz to 500 MHz4.5%4.3%
500 MHz to 1 GHz4.0%4.2%
1GHz to 10 GHz4.0%4.4%
10 GHz to 18 GHz5.0% 4.7%
18 GHz to 26.5 GHz5.9%
26.5 GHz to 40 GHz6.0%
Physical characteristics
DimensionsN1923A
N1924A
Weights with cableOption 105
Option 106
Fixed sensor cable
lengths
Option 105
Option 106
1
135 mm x 40 mm x 27 mm (5.3 in x 1.6 in x 1.1 in)
127 mm x 40 mm x 27 mm (5.0 in x 1.6 in x 1.1 in)
0.4 kg (0.88 Ib)
0.6 kg (1.32 Ib)
1.5 m (5-feet)
3.0 m (10-feet)
Environmental conditions
General Complies with the requirements of the EMC Directive 89/336/EEC
Operating
Temperature0° C to 55° C
Maximum humidity 95% at 40° C (non-condensing)
Minimum humidity 15% at 40 °C (non-condensing)
Maximum altitude 3,000 meters (9,840 feet)
Storage
Non-operating storage temperature –30° C to +70° C
Non-operating maximum humidity 90% at 65 °C (non-condescending)
Non-operating maximum altitude15,420 meters (50,000 feet)
1. Beyond 70 % humidity, an additional 0.6% should be added to these values.
13
System Specifications and Characteristics
Average power measurement accuracy
N1923A
N1924A
Video bandwidth
≤ ±0.2 dB or ±4.5 %
≤ ±0.3 dB or ±6.7 %
1
The video bandwidth in the peak
power analyzer can be set to High,
Medium, Low and Off. The video
bandwidths stated in the table below
are not the 3 dB bandwidths, as the
video bandwidths are corrected for
optimal flatness (except the Off filter).
Refer to Figure 1 for information
on the flatness response. The Off
video bandwidth setting provides
the warranted rise time and fall time
specification and is the recommended
setting for minimizing overshoot on
pulse signals.
0.5
0.0
–0.5
–1.0
–1.5
Error (dB)
–2.0
–2.5
–3.0
–3.5
0 5 10 15 20 25 30
Low
Off
(< 500 MHz)
Input tone separation frequency (MHz)
Medium
High
Off
(> 500 MHz)
Figure 1. Flatness Response
3.5
3
2.5
2
1.5
1
Peak to average (dB)
0.5
0
–10 10 30 50 70 90 110 130 150
Tone separation (MHz)
Figure 2. Video Bandwidth set to Off
1. 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 N1923A, and a frequency
range of 0.5 to 40 GHz, DUT Max. SWR < 1.2 for the N1924A. Averaging is set to 32.
14
System Specifications and Characteristics (continued)
Dynamic response - rise time, fall time, and overshoot versus video bandwidth settings
Average setting12481632641282565121024
< 500 MHz
> 500 MHz
1.000.750.550.400.350.300.250.220.210.200.19
1.000.730.520.370.280.210.170.150.140.140.14
Effect of video bandwidth setting
The noise per sample is reduced by applying the meter video bandwidth filter
setting (High, Medium or Low). If averaging is implemented, this will dominate
any effect of changing the video bandwidth.
Effect of time-gating on measurement noise
The measurement noise on a time-gated measurement will depend on the time
gate length. 100 averages are carried out every 1 µs of gate length. The Noiseper-Sample contribution in this mode can approximately be reduced by
√(gate length/10 ns) to a limit of 50 nW.
1. Specified as 10 % to 90 % for rise time and 90 % to 10 % for fall time on a 0 dBm pulse.
2. Specified as the overshoot relative to the settled pulse top power.
3. In triggered mode with timebase setting at 4 msec/div
4. Within 1 hour after a zero, at a constant temperature, after 24 hours warm-up of the peak power analyzer. This component can be disregarded with
Auto-zero mode set to ON.
5. Measured over a one-minute interval, at a constant temperature, two standard deviations, with averaging set to 1.
15
Appendix A
Uncertainty calculations for a power measurement (settled, average power)
[Specification values from this document are in bold italic, values calculated on this page are underlined.]
Process:
1. Power level: .............................................................................................................................................. W
1. The noise-to-power ratio is capped for powers > 100 μW, in these cases use: Noise/100 μW.
16
Worked Example
Uncertainty calculations for a power measurement (settled, average power)
[Specification values from this document are in bold italic, values calculated on this page are underlined.]
Process:
1. Power level: ..............................................................................................................................................
1. The noise-to-power ratio is capped for powers > 100 μW, in these cases use: Noise/100 μW.
17
Ordering Information
ModelDescription
Meter8990BPeak power analyzer
Standard-shipped
accessories
SensorN1923A
Standard-shipped
accessories
Meter8990B-800
SensorsN1923A-105
Other accessories8990B-1CM
Warranty and
calibration
Documentation8990B-0BF
Software8990B-1FP
Optical mouse
Stylus Pen
Mini keyboard
Calibration certificate
IO Libraries Media Suite
50 ohm BNC cable
Wideband power sensor, 50 MHz to 18 GHz
N1924A
Calibration certificate
N1923A/N1924A wideband power sensor operating and service guide - English
OptionsDescription
8990B-801
8990B-U01
8990B-U02
N1923A-106
N1924A-105
N1924A-106
N6921A
N6922A
N6923A
N6924A
N6925A
8990B-1A7
8990B-A6J
N1923A-1A7
N1923A-A6J
N1924A-1A7
N1924A-A6J
8990B-0BK
8990B-0BW
8990B-ABJ
8990B-0B0
8990B-ABA
N1923A-ABJ
N1923A-0B1
N1924A-ABJ
N1924A-0B1
N1923A-0BN
N1924A-0BN
N6903A
Wideband power sensor, 50 MHz to 40 GHz
Standard hard drive, installed
Removable hard drive, installed
With USB host
Without USB host
Fixed cable option length, 1.5 m (5 ft)
Fixed cable option length, 3 m (10 ft)
Fixed cable option length, 1.5 m (5 ft)
Fixed cable option length, 3 m (10 ft)
Rackmount kit, 8U full rack
Stacking kit
BNC extension cable, male to female
BNC adapter, right angle
Additional hard drive with image
Storage pouch
Compliant calibration test data - ISO17025, printed
Certificate of compliance calibration - ANSI/NCSL Z540, printed
Certificate of compliance calibration - ISO 17025 with test data; printed
Certificate of compliance calibration - ANSI Z540 with test data; printed
Certificate of compliance calibration - ISO 17025 with test data; printed
Certificate of compliance calibration - ANSI Z540 with test data; printed
English language programming guide, printed
English language user and programming guide, printed
English language service guide, printed
Japanese user guide and English programming guide, printed
Do not include printed manuals
English language user guide, printed
Japan, Japanese user guide, printed
English language user guide, printed
Japan, Japanese user guide, printed
English language user guide, printed
English language service guide, printed
English language service guide, printed
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