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Where to Find the Latest Information
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This chapter contains the specifications for the core signal analyzer. The specifications and
characteristics for the measurement applications and options are covered in the chapters that follow.
9
Agilent CXA Signal Analyzer
Definitions and Requirements
Definitions and Requirements
This book contains signal analyzer specifications and supplemental information. The distinction among
specifications, typical performance, and nominal values are described as follows.
Definitions
•Specifications describe the performance of parameters covered by the product warranty (temperature
= 5 to 50°C, unless otherwise noted).
•95th percentile values indicate the breadth of the population (>
expected to be met in 95% of the cases with a 95% confidence, for any ambient temperature in the
range of 20 to 30°C. In addition to the statistical observations of a sample of instruments, these values
include the effects of the uncertainties of external calibration references. These values are not
warranted. These values are updated occasionally if a significant change in the statistically observed
behavior of production instruments is observed.
•Typical describes additional product performance information that is not covered by the product
warranty. It is performance beyond specification that 80% of the units exhibit with a 95% confidence
level over the temperature range 20 to 30°C. Typical performance does not include measurement
uncertainty.
•Nominal values indicate expected performance, or describe product performance that is useful in the
application of the product, but is not covered by the product warranty.
2σ) of performance tolerances
Conditions Required to Meet Specifications
The following conditions must be met for the analyzer to meet its specifications.
• The analyzer is within its calibration cycle. See the General section of this chapter.
•Under auto couple control, except that Auto Sweep Time Rules = Accy.
•Any analyzer that has been stored at a temperature range inside the allowed storage range but outside
the allowed operating range must be stored at an ambient temperature within the allowed operating
range for at least two hours before being turned on.
•The analyzer has been turned on at least 30 minutes with Auto Align set to Normal, or if Auto Align
is set to Off or Partial, alignments must have been run recently enough to prevent an Alert message. If
the Alert condition is changed from “Time and Temperature” to one of the disabled duration choices,
the analyzer may fail to meet specifications without informing the user.
Certification
Agilent Technologies certifies that this product met its published specifications at the time of shipment
from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to
the United States National Institute of Standards and Technology, to the extent allowed by the Institute’s
calibration facility, and to the calibration facilities of other International Standards Organization
members.
10Chapter 1
Agilent CXA Signal Analyzer
Frequency and Time
Frequency and Time
DescriptionSpecificationsSupplemental Information
Frequency Range
Maximum Frequency
Option 5033.0 GHz
Option 5077.5 GHz
Preamp Option P033.0 GHz
Preamp Option P077.5 GHz
Minimum Frequency
Preamp
Off9 kHz
On100 kHz
Band
Band Overlaps
0 (9 kHz to 3.0 GHz) 1Options 503
1 (2.95 GHz to 3.80 GHz) 1Options 507
2 (3.70 GHz to 4.55 GHz) 1Options 507
3 (4.45 GHz to 5.30 GHz) 1Options 507
4 (5.20 GHz to 6.05 GHz) 1Options 507
5 (5.95 GHz to 6.80 GHz) 1Options 507
6 (6.70 GHz to 7.5 GHz) 1Options 507
a
LO Multiple (Nb)
Chapter 111
Agilent CXA Signal Analyzer
Frequency and Time
a. In the band overlap regions, for example, 2.95 to 3.0 GHz, the analyzer may use either band for
measurements, in this example Band 0 or Band 1. The analyzer gives preference to the band with the
better overall specifications, but will choose the other band if doing so is necessary to achieve a sweep
having minimum band crossings. For example, with CF = 2.98 GHz, with a span of 40 MHz or less,
the analyzer uses Band 0, because the stop frequency is 3.0 GHz or less, allowing a span without band
crossings in the preferred band. If the span is between 40 and 60 MHz, the analyzer uses Band 1,
because the start frequency is above 2.95 GHz, allowing the sweep to be done without a band crossing
in Band 1, though the stop frequency is above 3.0 GHz, preventing a Band 0 sweep without band
crossing. With a span greater than 60 MHz, a band crossing will be required: the analyzer sweeps up to
3.0 GHz in Band 0; then executes a band crossing and continues the sweep in Band 1.
Specifications are given separately for each band in the band overlap regions. One of these
specifications is for the preferred band, and one for the alternate band. Continuing with the example
from the previous paragraph (2.98 GHz), the preferred band is band 0 (indicated as frequencies under
3.0 GHz) and the alternate band is band 1 (2.95 to 3.8 GHz). The specifications for the preferred band
are warranted. The specifications for the alternate band are not warranted in the band overlap region,
but performance is nominally the same as those warranted specifications in the rest of the band. Again,
in this example, consider a signal at 2.98 GHz. If the sweep has been configured so that the signal at
2.98 GHz is measured in Band 1, the analysis behavior is nominally as stated in the Band 1
specification line (2.95 – 3.8 GHz) but is not warranted. If warranted performance is necessary for this
signal, the sweep should be reconfigured so that analysis occurs in Band 0. Another way to express this
situation in this example Band 0/Band 1 crossing is this: The specifications given in the
“Specifications” column which are described as “2.95 to 3.8 GHz” represent nominal performance
from 2.95 to 3.0 GHz, and warranted performance from 3.0 to 3.8 GHz.
b. N is the LO multiplication factor.
DescriptionSpecificationsSupplemental Information
Standard Frequency Reference
Accuracy±[(time since last adjustment × aging
rate) + temperature stability +
calibration accuracy
a
]
Temperature Stability
20 to 30 °C
5 to 50 °C
Aging Rate
Achievable Initial Calibration
±2 × 10
±2 × 10
±1 × 10
±1.4 × 10
−6
−6
−6
/year
−6
b
Accuracy
Settability
Residual FM
±2 × 10
−8
≤ (10 Hz) p-p in 20 ms (nominal)
Center Frequency = 1 GHz
10 Hz RBW, 10 Hz VBW
a. Calibration accuracy depends on how accurately the frequency standard was adjusted to 10 MHz. If the adjustment
procedure is followed, the calibration accuracy is given by the specification “Achievable Initial Calibration Accuracy”.
a. The warranted performance is only the sum of all errors under autocoupled conditions. Under non-autocoupled
conditions, the frequency readout accuracy will nominally meet the specification equation, except for conditions in
which the RBW term dominates, as explained in examples below. The nominal RBW contribution to frequency
readout accuracy is 4% of RBW for RBWs from 1 Hz to 3 MHz (the widest autocoupled RBW), and 30% of RBW for
the (manually selected) 4, 5, 6 and 8 MHz RBWs.
Example: a 20 MHz span, with a 4 MHz RBW. The specification equation does not apply because the Span: RBW
ratio is not autocoupled. If the equation did apply, it would allow 50 kHz of error (0.25%) due to the span and 200
kHz error (5%) due to the RBW. For this non-autocoupled RBW, the RBW error is nominally 30%, or 1200 kHz.
b. Horizontal resolution is due to the marker reading out one of the trace points. The points are spaced by span/(Npts -
1), where Npts is the number of sweep points. For example, with the factory preset value of 1001 sweep points, the
horizontal resolution is span/1000. However, there is an exception: When both the detector mode is “normal” and the
span > 0.25 × (Npts - 1) × RBW, peaks can occur only in even-numbered points, so the effective horizontal resolution
becomes doubled, or span/500 for the factory preset case. When the RBW is autocoupled and there are 1001 sweep
points, that exception occurs only for spans > 750 MHz.
c. In most cases, the frequency readout accuracy of the analyzer can be exceptionally good. As an example, Agilent has
characterized the accuracy of a span commonly used for Electro-Magnetic Compatibility (EMC) testing using a
source frequency locked to the analyzer. Ideally, this sweep would include EMC bands C and D and thus sweep from
30 to 1000 MHz. Ideally, the analysis bandwidth would be 120 kHz at −6 dB, and the spacing of the points would be
half of this (60 kHz). With a start frequency of 30 MHz and a stop frequency of 1000.2 MHz and a total of 16168
points, the spacing of points is ideal. The detector used was the Peak detector. The accuracy of frequency readout of
all the points tested in this span was with ±0.0032% of the span. A perfect analyzer with this many points would have
an accuracy of ±0.0031% of span. Thus, even with this large number of display points, the errors in excess of the
a. Instrument conditions: RBW = 1 kHz, gate time = auto (100 ms), S/N ≥ 50 dB, frequency = 1 GHz.
b. If the signal being measured is locked to the same frequency reference as the analyzer, the specified count accuracy is
a. This error is a noisiness of the result. It will increase with noisy
Agilent CXA Signal Analyzer
Frequency and Time
DescriptionSpecificationsSupplemental Information
Frequency Span
Range
Swept and FFT
Option 5030 Hz, 10 Hz to 3 GHz
Option 5070 Hz, 10 Hz to 7.5 GHz
Resolution2 Hz
Span Accuracy
Swept
FFT
±(0.25% × span + horizontal resolution
±(0.10% × span + horizontal resolution
a
)
a
)
a. Horizontal resolution is due to the marker reading out one of the trace points. The points are spaced by span/(Npts −
1), where Npts is the number of sweep points. For example, with the factory preset value of 1001 sweep points, the
horizontal resolution is span/1000. However, there is an exception: When both the detector mode is “normal” and the
span > 0.25 × (Npts − 1) × RBW, peaks can occur only in even-numbered points, so the effective horizontal resolution
becomes doubled, or span/500 for the factory preset case. When the RBW is auto coupled and there are 1001 sweep
points, that exception occurs only for spans > 750 MHz.
DescriptionSpecificationsSupplemental Information
Sweep Time
Range
Span = 0 Hz1 μs to 6000 s
Span ≥ 10 Hz1 ms to 4000 s
Accuracy
Span ≥ 10 Hz, swept±0.01% (nominal)
Span ≥ 10 Hz, FFT±40% (nominal)
Span = 0 Hz±1% (nominal)
Sweep TriggerFree Run, Line, Video, External 1,
RF Burst, Periodic Timer
Delayed Trigger
a
Range
Span ≥ 10 Hz, swept1 μs to 500 ms
Span = 0 Hz or FFT−150 ms to +500 ms
Resolution
0.1 μs
a. Delayed trigger is available with line, video, RF burst and external triggers.
14Chapter 1
Agilent CXA Signal Analyzer
Frequency and Time
DescriptionSpecificationsSupplemental Information
TriggersAdditional information on some of the
triggers and gate sources
VideoIndependent of Display Scaling and
Reference Level
Minimum settable level−170 dBmUseful range limited by noise
Maximum usable level
Highest allowed mixer level
a
+ 2dB (nominal)
Detector and Sweep Type
relationships
Sweep Type = Swept
Detector = Normal, Peak,
Sample or Negative Peak
Triggers on the signal before detection, which
is similar to the displayed signal
Detector = AverageTriggers on the signal before detection, but
with a single-pole filter added to give similar
smoothing to that of the average detector
Sweep Type = FFTTriggers on the signal envelop in a bandwidth
wider than the FFT width
RF Burst
Level Range−50 to −10 dBm plus attenuation (nominal)
Bandwidth (−10 dB)
Most cases18 MHz (nominal)
Frequency LimitationsIf the start or center frequency is too close to
zero, LO feedthrough can degrade or prevent
triggering. How close is too close depends on
the bandwidth.
External TriggersSee “Inputs/Outputs” on page 47.
a. The highest allowed mixer level depends on the attenuation and IF Gain. It is nominally −10 dBm + input attenuation
for Preamp Off and IF Gain = Low.
Chapter 115
Agilent CXA Signal Analyzer
Frequency and Time
Description SpecificationsSupplemental Information
Gated Sweep
Gate Methods Gated LO
Gated Video
Gated FFT
Span Range Any span
Gate Delay Range 0 to 100.0 s
Gate Delay Settability 4 digits, ≥ 100 ns
Gate Delay Jitter33.3 ns p-p (nominal)
Gate Length Range
Except Method = FFT
Gated Frequency and
Amplitude Errors
Gate Sources External
100.0 ns to 5.0 s
Nominally no additional error for gated
measurements when the Gate Delay is
greater than the MIN FAST setting
Pos or neg edge triggered
Line
RF Burst
Periodic
DescriptionSpecificationsSupplemental Information
Number of Frequency Display
Trace Points (buckets)
Factory preset1,001
Range1 to 40,001Zero and non-zero spans
16Chapter 1
Agilent CXA Signal Analyzer
Frequency and Time
DescriptionSpecificationsSupplemental Information
Resolution Bandwidth (RBW)
Range (−3.01 dB bandwidth)1 Hz to 8 MHz
Bandwidths above 3 MHz are 4, 5, 6, and
8MHz.
Bandwidths 1 Hz to 3 MHz are spaced at
10 % spacing using the E24 series (24 per
decade): 1.0, 1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2.0,
2.2, 2.4, 2.7, 3.0, 3.3, 3.6, 3.9, 4.3, 4.7, 5.1,
5.6, 6.2, 6.8, 7.5, 8.2, 9.1 in each decade.
Power bandwidth accuracy
a
RBW Range
1 Hz to 750 kHz±1.0% (±0.044 dB) (nominal)
820 kHz to 1.2 MHz±2.0% (±0.088 dB) (nominal)
1.3 to 2.0 MHz±0.07 dB (nominal)
2.2 to 3 MHz±0.15 dB (nominal)
4 to 8 MHz±0.25 dB (nominal)
Accuracy (−3.01 dB bandwidth)
b
RBW Range
1 Hz to 1.3 MHz±2% (nominal)
1.5 to 3.0 MHz±7% (nominal)
4 to 8 MHz±15% (nominal)
Selectivity
c
(−60 dB/−3 dB)
4.1:1 (nominal)
a. The noise marker, band power marker, channel power and ACP all compute their results using the power bandwidth of
the RBW used for the measurement. Power bandwidth accuracy is the power uncertainty in the results of these
measurements due only to bandwidth-related errors. (The analyzer knows this power bandwidth for each RBW with
greater accuracy than the RBW width itself, and can therefore achieve lower errors.) The warranted specifications shown
apply to the Gaussian RBW filters used in swept and zero span analysis. There are four different kinds of filters used in
the spectrum analyzer: Swept Gaussian, Swept Flattop, FFT Gaussian and FFT Flattop. While the warranted
performance only applies to the swept Gaussian filters, because only they are kept under statistical process control, the
other filters nominally have the same performance.
b. Resolution Bandwidth Accuracy can be observed at slower sweep times than auto-coupled conditions. Normal sweep
rates cause the shape of the RBW filter displayed on the analyzer screen to widen by nominally 6%. This widening
declines to 0.6% nominal when the Swp Time Rules key is set to Accuracy instead of Normal. The true bandwidth,
which determines the response to impulsive signals and noise-like signals, is not affected by the sweep rate.
c. The RBW filters are implemented digitally, and the Selectivity is defined to be 4.1:1. Verifying the selectivity with
RBW’s above 100 kHz becomes increasing problematic due to SNR affecting the −60 dB measurement.
Chapter 117
Agilent CXA Signal Analyzer
Frequency and Time
DescriptionSpecificationSupplemental information
Analysis Bandwidth
a
Standard10 MHz
a. Analysis bandwidth is the instantaneous bandwidth available around a center frequency over which the input signal can
be digitized for further analysis or processing in the time, frequency, or modulation domain.
DescriptionSpecificationsSupplemental Information
Video Bandwidth (VBW)
RangeSame as Resolution Bandwidth range plus
wide-open VBW (labeled 50 MHz)
Accuracy±6% (nominal)
in swept mode and zero span
a. For FFT processing, the selected VBW is used to determine a number of averages for FFT results. That number is
chosen to give roughly equival lay smoothing to VBW filtering in a swept measurement. For example, if VBW=0.1 ×
RBW, four FFTs are averaged to generate one result.
a
18Chapter 1
Agilent CXA Signal Analyzer
Amplitude Accuracy and Range
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
Measurement Range
Preamp off
100 kHz to 1 MHz
1 MHz to 7.5 GHz
Preamp on (Option P03/P07)
100 kHz to 7.5 GHzDisplayed Average Noise Level to +15 dBm
Input Attenuation Range
100 kHz to 7.5 GHz
Input Attenuation Range
100 kHz to 7.5 GHz
Displayed Average Noise Level to +20 dBm
Displayed Average Noise Level to +23 dBm
0 to 50 dB, in 10 dB stepsStandard
0 to 50 dB, in 2 dB stepsWith Option FSA
DescriptionSpecificationsSupplemental Information
Maximum Safe Input Level
Average Total Power
input attenuation ≥ 20 dB
Peak Pulse Power
<10 μs pulse width,
<1% duty cycle
input attenuation ≥ 30 dB
AC Coupled±50 Vdc
Average Total Power, preamp on
(Option P03/P07)
input attenuation ≥ 20 dB
DescriptionSpecificationsSupplemental Information
Display Range
Log ScaleTen divisions displayed;
Linear ScaleTen divisions
Scale unitsdBm, dBmV, dBμV, dBmA, dBμA, V, W, A
+30 dBm (1 W)
+50 dBm (100 W)
+10 dBm (10 mW)
0.1 to 1.0 dB/division in 0.1 dB steps, and
1 to 20 dB/division in 1 dB steps
Chapter 119
Agilent CXA Signal Analyzer
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
Marker Readout
a
Log units resolution
Average Off, on-screen0.01 dB
Average On or remote0.001 dB
Linear units resolution≤1% of signal level (nominal)
a. Reference level and off-screen performance: The reference level (RL) behavior differs from previous analyzers
(except PSA) in a way that makes the Agilent CXA Signal Analyzer more flexible. In previous analyzers, the RL
controlled how the measurement was performed as well as how it was displayed. Because the logarithmic amplifier in previous analyzers had both range and resolution limitations, this behavior was necessary for optimum measurement accuracy. The logarithmic amplifier in the CXA signal analyzer, however, is implemented digitally such
that the range and resolution greatly exceed other instrument limitations. Because of this, the CXA signal analyzer
can make measurements largely independent of the setting of the RL without compromising accuracy. Because the
RL becomes a display function, not a measurement function, a marker can read out results that are off-screen,
either above or below, without any change in accuracy. The only exception to the independence of RL and the way
in which the measurement is performed is in the input attenuation setting: When the input attenuation is set to auto,
the rules for the determination of the input attenuation include dependence on the reference level. Because the
input attenuation setting controls the tradeoff between large signal behaviors (third-order intermodulation and
compression) and small signal effects (noise), the measurement results can change with RL changes when the
input attenuation is set to auto.
DescriptionSpecificationsSupplemental Information
Frequency ResponseRefer to the footnote for “Band
Overlaps” on page 11
Maximum error relative to
reference condition (50 MHz)
Swept operation
Preamp off,
a
20 to 30°C5 to 50°C95th Percentile (≈ 2σ)
Input attenuation 10 dB
9 kHz to 10 MHz±0.60 dB±0.65 dB±0.45 dB
10 MHz to 3 GHz±0.75 dB±1.75 dB±0.55 dB
3 to 5.25 GHz±1.45 dB±2.50 dB±1.00 dB
5.25 to 7.5 GHz±1.65 dB±2.60 dB±1.20 dB
Preamp on, (Option P03/P07)
Input attenuation 0 dB
100 kHz to 3 GHz±0.70 dB
3 to 5.25 GHz±0.85 dB
5.25 to 7.5 GHz±1.35 dB
a. For Sweep Type = FFT, add the RF flatness errors of this table to the IF Frequency Response errors. An additional
error source, the error in switching between swept and FFT sweep types, is nominally 0.01 dB and is included within
the "Absolute Amplitude Error" specifications.
20Chapter 1
Agilent CXA Signal Analyzer
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
IF Frequency Response
a
Demodulation and FFT response
relative to the center frequency
95th Percentile
Freq (GHz)
Max Error
(Exceptionsc)
b
Midwidth
Error
Slope
(dB/MHz)
d
RMS
(nominal)
≤ 3.00.45 dB0.15 dB0.100.03 dB
3.0 to 7.50.25 dB
a. The IF frequency response includes effects due to RF circuits such as input filters, that are a function of RF frequency,
in addition to the IF pass-band effects.
b. The maximum error at an offset (f) from the center of the FFT width is given by the expression ± [Midwidth Error +
(f × Slope)], but never exceeds ±Max Error. Usually, the span is no larger than the FFT width in which case the center
of the FFT width is the center frequency of the analyzer. When the analyzer span is wider than the FFT width, the
span is made up of multiple concatenated FFT results, and thus has multiple centers of FFT widths so the f in the
equation is the offset from the nearest center. These specifications include the effect of RF frequency response as well
as IF frequency response at the worst case center frequency. Performance is nominally three times better than the
maximum error at most center frequencies.
c. The specification does not apply for frequencies greater than 3.6 MHz from the center in FFT Widths of 7.2 to 8
MHz.
d. The "RMS" nominal performance is the standard deviation of the response relative to the center frequency, integrated
across a 10 MHz span. This performance measure was observed at a single center frequency in each harmonic mixing
band, which is representative of all center frequencies; the observation center frequency is not the worst case center
frequency.
DescriptionSpecificationsSupplemental Information
Input Attenuation Switching Uncertainty
Relative to 10 dB (reference setting)
Refer to the footnote for “Band
Overlaps” on page 11
Frequency Range
50 MHz (reference frequency)±0.32 dB±0.15 dB (typical)
Attenuation > 2 dB, preamp off
100 kHz to 3 GHz±0.30 dB (nominal)
3 to 7.5 GHz±0.50 dB (nominal)
Chapter 121
Agilent CXA Signal Analyzer
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
Absolute Amplitude Accuracy
Preamp off
At 50 MHz
a
20 to 30°C±0.40 dB±0.30 dB (95th Percentile ≈ 2σ)
5 to 50°C±0.60 dB
At all frequencies
a
20 to 30°C±(0.40 dB + frequency response)
5 to 50°C±(0.60 dB + frequency response)
95
th Percentile Absolute
Amplitude Accuracy
b
Wide range of signal levels,
RBWs, RLs, etc.
Atten = 10 dB
100 kHz to 10 MHz±0.40 dB
10 MHz to 2.0 GHz±0.49 dB
2.0 to 3.0 GHz±0.60 dB
Preamp on
c
(Option P03/P07)
±(0.39 dB + frequency response)
(nominal)
a. Absolute amplitude accuracy is the total of all amplitude measurement errors, and applies over the following sub-
set of settings and conditions: 1 Hz ≤ RBW ≤ 1 MHz; Input signal −10 to −50 dBm; Input attenuation 10 dB;
span < 5 MHz (nominal additional error for span ≥ 5 MHz is 0.02 dB); all settings auto-coupled except Swp Time
Rules = Accuracy; combinations of low signal level and wide RBW use VBW ≤ 30 kHz to reduce noise.
This absolute amplitude accuracy specification includes the sum of the following individual specifications under
the conditions listed above: Scale Fidelity, Reference Level Accuracy, Display Scale Switching Uncertainty,
Resolution Bandwidth Switching Uncertainty, 50 MHz Amplitude Reference Accuracy, and the accuracy with
which the instrument aligns its internal gains to the 50 MHz Amplitude Reference.
b.Absolute Amplitude Accuracy for a wide range of signal and measurement settings, covers the 95th percentile
proportion with 95% confidence. Here are the details of what is covered and how the computation is made:
The wide range of conditions of RBW, signal level, VBW, reference level and display scale are discussed in footnote
a. There are 108 quasirandom combinations used, tested at a 50 MHz signal frequency. We compute the 95th
percentile proportion with 95% confidence for this set observed over a statistically significant number of instruments.
Also, the frequency response relative to the 50 MHz response is characterized by varying the signal across a large
number of quasi-random verification frequencies that are chosen to not correspond with the frequency response
adjustment frequencies. We again compute the 95th percentile proportion with 95% confidence for this set observed
over a statistically significant number of instruments. We also compute the 95th percentile accuracy of tracing the
calibration of the 50 MHz absolute amplitude accuracy to a national standards organization. We also compute the 95th
percentile accuracy of tracing the calibration of the relative frequency response to a national standards organization.
We take the root-sum-square of these four independent Gaussian parameters. To that rss we add the environmental
effects of temperature variations across the 20 to 30°C range.
c. Same settings as footnote a, except that the signal level at the preamp input is −40 to −80 dBm. Total power at preamp
(dBm) = total power at input (dBm) minus input attenuation (dB). This specification applies for signal frequencies
above 100 kHz.
22Chapter 1
Agilent CXA Signal Analyzer
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
RF Input VSWR
Input attenuation 10 dB, 50 MHz
1.03:1 (nominal
a
)
Frequency
Input Attenuation (nominal)
a
Preamp off10 dB≥ 20 dB
300 kHz to 3 GHzSee nominal VSWR plots< 1.4:1
3 to 7.5 GHzSee nominal VSWR plots< 1.8:1
Preamp on0 dB
10 MHz to 3 GHz< 2.2:1
3 to 7.5 GHz< 2.4:1
a. The nominal SWR stated is given for the worst case RF frequency in three representative instruments.
Chapter 123
Agilent CXA Signal Analyzer
Amplitude Accuracy and Range
Nominal Instrument Input VSWR
VSWR
1.50
1.40
1.30
1.20
1.10
1.00
0.00.51.01.52.02.53.0
VSWR
2.00
1.90
1.80
1.70
1.60
1.50
1.40
1.30
1.20
1.10
1.00
3.03. 54.04.55. 05.56. 06.57. 07.5
VSWR vs. Frequency, 3 Units, 10 dB Att enuation
GHz
VSWR vs. Fre quency, 3 Units, 10 dB Atte nuation
GHz
24Chapter 1
Agilent CXA Signal Analyzer
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
Resolution Bandwidth Switching Uncertainty
relative to reference BW of 30 kHz
1.0 Hz to 3 MHz RBW±0.15 dB±0.05 dB (typical)
Manually selected wide RBWs:
4, 5, 6, 8 MHz±1.00 dB
DescriptionSpecificationsSupplemental Information
Reference Level
a
Range
Log Units −170 to +30 dBm in 0.01 dB steps
Linear Units 707 pV to 7.07 V with 0.01 dB resolution (0.11%)
Accuracy
0 dB
b
a. Reference level and off-screen performance: The reference level (RL) behavior differs from previous analyzers
(except PSA) in a way that makes the Agilent CXA Signal Analyzer more flexible. In previous analyzers, the RL
controlled how the measurement was performed as well as how it was displayed. Because the logarithmic amplifier in
previous analyzers had both range and resolution limitations, this behavior was necessary for optimum measurement
accuracy. The logarithmic amplifier in the CXA signal analyzer, however, is implemented digitally such that the range
and resolution greatly exceed other instrument limitations. Because of this, the CXA signal analyzer can make
measurements largely independent of the setting of the RL without compromising accuracy. Because the RL becomes
a display function, not a measurement function, a marker can read out results that are off-screen, either above or below,
without any change in accuracy. The only exception to the independence of RL and the way in which the measurement
is performed is in the input attenuation setting: When the input attenuation is set to auto, the rules for the determination
of the input attenuation include dependence on the reference level. Because the input attenuation setting controls the
tradeoff between large signal behaviors (third-order intermodulation and compression) and small signal effects (noise),
the measurement results can change with RL changes when the input attenuation is set to auto.
b. Because reference level affects only the display, not the measurement, it causes no additional error in measurement
results from trace data or markers.
DescriptionSpecificationsSupplemental Information
Display Scale Switching Uncertainty
Switching between Linear and Log
Log Scale Switching
0 dB
0 dB
a
a
a. Because Log/Lin and Log Scale Switching affect only the display, not the measurement, they cause no additional
error in measurement results from trace data or markers.
Chapter 125
Agilent CXA Signal Analyzer
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
Display Scale Fidelity
abc
Log-Linear Fidelity (relative to the reference
condition of −25 dBm input through the 10 dB
attenuation, or −35 dBm at the input mixer)
Input mixer level
d
Linearity
−80 dBm ≤ ML < −15 dBm±0.15 dB
−15 dBm ≤ ML ≤ −10 dBm±0.30 dB±0.15 dB (typical)
Relative Fidelity
e
Applies for mixer leveld range from
−10 to −80 dBm, preamp off, dither on
Sum of the following terms:
high level term
Up to ±0.045 dB
f
instability termUp to ±0.018 dB
slope term
a. Supplemental information: The amplitude detection linearity specification applies at all levels below −10 dBm at the
input mixer; however, noise will reduce the accuracy of low level measurements. The amplitude error due to noise is
determined by the signal-to-noise ratio, S/N. If the S/N is large (20 dB or better), the amplitude error due to noise can
be estimated from the equation below, given for the 3-sigma (three standard deviations) level.
3
σ
320dB()110
The errors due to S/N ratio can be further reduced by averaging results. For large S/N (20 dB or better), the 3-sigma
level can be reduced proportional to the square root of the number of averages taken.
b. The scale fidelity is warranted with ADC dither set to On. Dither increases the noise level by nominally only 0.24 dB
for the most sensitive case (preamp Off, best DANL frequencies). With dither Off, scale fidelity for low level signals,
around −60 dBm or lower, will nominally degrade by 0.2 dB.
c. Reference level and off-screen performance: The reference level (RL) behavior differs from some earlier analyzers in
a way that makes this analyzer more flexible. In other analyzers, the RL controlled how the measurement was
performed as well as how it was displayed. Because the logarithmic amplifier in these analyzers had both range and
resolution limitations, this behavior was necessary for optimum measurement accuracy. The logarithmic amplifier in
this signal analyzer, however, is implemented digitally such that the range and resolution greatly exceed other
instrument limitations. Because of this, the analyzer can make measurements largely independent of the setting of the
RL without compromising accuracy. Because the RL becomes a display function, not a measurement function, a
marker can read out results that are off-screen, either above or below, without any change in accuracy. The only
exception to the independence of RL and the way in which the measurement is performed is in the input attenuator
setting: When the input attenuator is set to auto, the rules for the determination of the input attenuation include
dependence on the reference level. Because the input attenuation setting controls the tradeoff between large signal
behaviors (third-order intermodulation and compression) and small signal effects (noise), the measurement results can
change with RL changes when the input attenuation is set to auto.
d. Mixer level = Input Level − Input Attenuator
e. The relative fidelity is the error in the measured difference between two signal levels. It is so small in many cases that
it cannot be verified without being dominated by measurement uncertainty of the verification. Because of this
verification difficulty, this specification gives nominal performance, based on numbers that are as conservatively
determined as those used in warranted specifications. We will consider one example of the use of the error equation to
compute the nominal performance.
Example: the accuracy of the relative level of a sideband around −60 dBm, with a carrier at −5 dBm, using attenuator
= 10 dB, RBW = 3 kHz, evaluated with swept analysis. The high level term is evaluated with P1 = −15 dBm and P2 =
−70 dBm at the mixer. This gives a maximum error within ±0.039 dB. The instability term is ±0.018 dB. The slope
term evaluates to ±0.050 dB. The sum of all these terms is ±0.107 dB.
SN⁄3dB+()20dB⁄()–
+〈〉log=
From equation
g
26Chapter 1
Agilent CXA Signal Analyzer
Amplitude Accuracy and Range
f. Errors at high mixer levels will nominally be well within the range of ±0.045 dB × {exp[(P1 − Pref)/(8.69 dB)] −
exp[(P2 − Pref)/(8.69 dB)]}. In this expression, P1 and P2 are the powers of the two signals, in decibel units, whose
relative power is being measured. Prof is −10 dBm. All these levels are referred to the mixer level.
g. Slope error will nominally be well within the range of ±0.0009 × (P1 − P2). P1 and P2 are defined in footnote
DescriptionSpecificationsSupplemental Information
f.
Available DetectorsNormal, Peak, Sample,
Negative Peak, Average
Average detector works on RMS,
Voltage and Logarithmic scales
DescriptionSpecificationsSupplemental Information
Preamplifier
Gain
100 kHz to 7.5 GHz+20 dB (nominal)
Chapter 127
Agilent CXA Signal Analyzer
Dynamic Range
Dynamic Range
Gain Compression
DescriptionSpecificationsSupplemental Information
1 dB Gain Compression Point
(Two-tone)
Preamp off
50 MHz to 7.5 GHz
Preamp on (Option P03/P07)
50 MHz to 7.5 GHz
a. Large signals, even at frequencies not shown on the screen, can cause the analyzer to incorrectly measure on-screen
b. Specified at 1 kHz RBW with 1 MHz tone spacing.
c. Reference level and off-screen performance: The reference level (RL) behavior differs from some earlier analyzers
d. Mixer power level (dBm) = input power (dBm) − input attenuation (dB).
abc
Maximum power at mixer
+2.00 dBm (nominal)
-19.00 dBm (nominal)
signals because of two-tone gain compression. This specification tells how large an interfering signal must be in
order to cause a 1 dB change in an on-screen signal.
in a way that makes this analyzer more flexible. In other analyzers, the RL controlled how the measurement was
performed as well as how it was displayed. Because the logarithmic amplifier in these analyzers had both range and
resolution limitations, this behavior was necessary for optimum measurement accuracy. The logarithmic amplifier
in this signal analyzer, however, is implemented digitally such that the range and resolution greatly exceed other
instrument limitations. Because of this, the analyzer can make measurements largely independent of the setting of
the RL without compromising accuracy. Because the RL becomes a display function, not a measurement function,
a marker can read out results that are off-screen, either above or below, without any change in accuracy. The only
exception to the independence of RL and the way in which the measurement is performed is in the input attenuation
setting: When the input attenuation is set to auto, the rules for the determination of the input attenuation include
dependence on the reference level. Because the input attenuation setting controls the tradeoff between large signal
behaviors (third-order intermodulation, compression, and display scale fidelity) and small signal effects (noise), the
measurement results can change with RL changes when the input attenuation is set to auto.
d
28Chapter 1
Agilent CXA Signal Analyzer
Dynamic Range
Displayed Average Noise Level
DescriptionSpecificationsSupplemental Information
Displayed Average
Noise Level (DANL)
Input terminated Sample or Average
a
detector
Refer to the footnote for “Band
Overlaps” on page 11
Averaging type = Log
0 dB input attenuation
IF Gain = High
1 Hz Resolution Bandwidth
20 to 30°C5 to 50°CTypical
Preamp off
9 kHz to 1 MHz
1 to 10 MHz
b
b
−130 dBm−129 dBm−137 dBm
−120 dBm
10 MHz to 1.5 GHz−148 dBm−145 dBm−150 dBm
1.5 to 2.2 GHz−144 dBm−141 dBm−147 dBm
2.2 to 3 GHz−140 dBm−138 dBm−143 dBm
3 to 4.5 GHz−137 dBm−136 dBm−140 dBm
4.5 to 6 GHz−133 dBm−130 dBm−136 dBm
6 to 7.5 GHz−128 dBm−125 dBm−131dBm
Preamp on
(Option P03/P07)
100 kHz to 1 MHz
1 to 10 MHz
b
b
−149 dBm−148 dBm−157 dBm
−139 dBm
10 MHz to 1.5 GHz−161 dBm−159 dBm−163 dBm
1.5 to 2.2 GHz−160 dBm−159 dBm−163 dBm
2.2 to 3 GHz−158 dBm−157 dBm−161 dBm
3 to 4.5 GHz−155 dBm−154 dBm−159 dBm
4.5 to 6 GHz−152 dBm−150 dBm−156 dBm
6 to 7.5 GHz−148 dBm−146 dBm−152 dBm
a. DANL for zero span and swept is normalized in two ways and for two reasons. DANL is measured in a 1 kHz
RBW and normalized to the narrowest available RBW, because the noise figure does not depend on RBW and 1
kHz measurements are faster. The second normalization is that DANL is measured with 10 dB input attenuation
and normalized to the 0 dB input attenuation case, because that makes DANL and third order intermodulation test
conditions congruent, allowing accurate dynamic range estimation for the analyzer.
b. DANL below 10 MHz is dominated by phase noise around the LO feedthrough signal.
Chapter 129
Agilent CXA Signal Analyzer
Dynamic Range
Spurious Response
DescriptionSpecificationsSupplemental Information
Spurious Responses
20 to 30°C
Mixer Level
a
Response
Preamp Off
Refer to the footnote for
b
“Band Overlaps” on page 11
Residual Responses
200 kHz to 7.5 GHz (swept)
Zero span or FFT or other frequencies
c
N/A−90 dBm
−100 dBm (nominal)
Input Related Spurious Responses
10 MHz to 7.5 GHz−30 dBm−60 dBc (typical)
System related Sidebands
Offset from CW signal
50 to 200 Hz
200 Hz to 3 kHz
3 kHz to 300 kHz
300 kHz to 10 MHz
−50 dBc (nominal)
−65 dBc (nominal)
−65 dBc (nominal)
−80 dBc (nominal)
a. Mixer Level = Input Level − Input Attenuation.
b. The spurious response specifications only apply with the preamp turned off. When the preamp is turned on,
performance is nominally the same as long as the mixer level is interpreted to be: Mixer Level = Input Level − Input
Attenuation − Preamp Gain.
c. Input terminated, 0 dB input attenuation.
Second Harmonic Distortion
DescriptionSpecificationsSupplemental Information
Second Harmonic DistortionDistortion
Source Frequency, 10 MHz to 3.75 GHz
Input attenuation 10 dB
Preamp off
−65 dBc+35 dBm−72 dBc+42 dBm
Input level −20 dBm
Preamp On
Input level −40 dBm
a. SHI = second harmonic intercept. The SHI is given by the mixer power in dBm minus the second harmonic dis-
tortion level relative to the mixer tone in dBc.
SHI
a
Distortion
(nominal)
SHI
(nominal)
−60 dBc+10 dBm
30Chapter 1
Agilent CXA Signal Analyzer
Third Order intermodulation Distortion
DescriptionSpecificationsSupplemental Information
Dynamic Range
Third Order
Intermodulation Distortion
a
Refer to the footnote for “Band Overlaps”
on page 11
Two −20 dBm tones at the input, spaced
by 100 kHz, input attenuation 0 dB
20 to 30°C
Intercept
b
Extrapolated
Distortion
c
Intercept
10 to 400 MHz+10 dBm−60 dBc+14 dBm (typical)
400 MHz to 3 GHz+13 dBm−66 dBc+17 dBm (typical)
3 to 7.5 GHz+13 dBm−66 dBc+15 dBm (typical)
Preamp on (Option P03/P07)
Two -45 dBm tones at the input, spaced
by 100 kHz, input attenuation 0 dB
10 MHz to 7.5 GHz −8 dBm (nominal)
a. TOI is verified with IF Gain set to its best case condition, which is IF Gain = Low.
b. TOI = third order intercept. The TOI is given by the mixer tone level (in dBm) minus (distortion/2) where distor-
tion is the relative level of the distortion tones in dBc.
c. The distortion shown is computed from the warranted intercept specifications, based on two tones at −20 dBm
each, instead of being measured directly.
Chapter 131
Agilent CXA Signal Analyzer
Dynamic Range
Nominal Dynamic Range at 1 GHz [Plot]
(dB)
DANL and distortion
relative to mixer level
32Chapter 1
Nominal Dynamic Range Band 1-4 [Plot]
(dB)
Agilent CXA Signal Analyzer
Dynamic Range
DANL and distortion
relative to mixer level
Chapter 133
Agilent CXA Signal Analyzer
Dynamic Range
Nominal TOI vs. Mixer Level and Tone Separation [Plot]
a. The effect of scale fidelity on the ratio of two powers is called the relative scale fidelity. The scale fidelity
specified in the Amplitude section is an absolute scale fidelity with −35 dBm at the input mixer as the reference
point. The relative scale fidelity is nominally only 0.01 dB larger than the absolute scale fidelity.
b. See Amplitude Accuracy and Range section.
c. See Frequency and Time section.
d. Expressed in decibels.
38Chapter 1
Agilent CXA Signal Analyzer
x
–
Power Suite Measurements
e. An ACP measurement measures the power in adjacent channels. The shape of the response versus frequency of
those adjacent channels is occasionally critical. One parameter of the shape is its 3 dB bandwidth. When the
bandwidth (called the Ref BW) of the adjacent channel is set, it is the 3 dB bandwidth that is set. The passband
response is given by the convolution of two functions: a rectangle of width equal to Ref BW and the power
response versus frequency of the RBW filter used. Measurements and specifications of analog radio ACPs are
often based on defined bandwidths of measuring receivers, and these are defined by their −6 dB widths, not their
−3 dB widths. To achieve a passband whose −6 dB width is x, set the Ref BW to be .
0.572 RBW×
f. Most versions of adjacent channel power measurements use negative numbers, in units of dBc, to refer to the
power in an adjacent channel relative to the power in a main channel, in accordance with ITU standards. The
standards for W-CDMA analysis include ACLR, a positive number represented in dB units. In order to be consistent with other kinds of ACP measurements, this measurement and its specifications will use negative dBc
results, and refer to them as ACPR, instead of positive dB results referred to as ACLR. The ACLR can be deter-
mined from the ACPR reported by merely reversing the sign.
g. The accuracy of the Adjacent Channel Power Ratio will depend on the mixer drive level and whether the
distortion products from the analyzer are coherent with those in the UUT. These specifications apply even in the
worst case condition of coherent analyzer and UUT distortion products. For ACPR levels other than those in this
specifications table, the optimum mixer drive level for accuracy is approximately −37 dBm − (ACPR/3), where
the ACPR is given in (negative) decibels.
h. The Fast method has a slight decrease in accuracy in only one case: for BTS measurements at 5 MHz offset, the
accuracy degrades by ±0.01 dB relative to the accuracy shown in this table.
i. To meet this specified accuracy when measuring mobile station (MS) or user equipment (UE) within 3 dB of the
required −33 dBc ACPR, the mixer level (ML) must be optimized for accuracy. This optimum mixer level is −20
dBm, so the input attenuation must be set as close as possible to the average input power − (−20 dBm). For
example, if the average input power is −6 dBm, set the attenuation to 14 dB. This specification applies for the
normal 3.5 dB peak-to-average ratio of a single code. Note that if the mixer level is set to optimize dynamic
range instead of accuracy, accuracy errors are nominally doubled.
j. ACPR accuracy at 10 MHz offset is warranted when the input attenuator is set to give an average mixer level
of −10 dBm.
k. In order to meet this specified accuracy, the mixer level must be optimized for accuracy when measuring node B
Base Transmission Station (BTS) within 3 dB of the required −45 dBc ACPR. This optimum mixer level is −18
dBm, so the input attenuation must be set as close as possible to the average input power − (−18 dBm). For
example, if the average input power is −5 dBm, set the attenuation to 13 dB. This specification applies for the
normal 10 dB peak-to-average ratio (at 0.01% probability) for Test Model 1. Note that, if the mixer level is set to
optimize dynamic range instead of accuracy, accuracy errors are nominally doubled.
l. Accuracy can be excellent even at low ACPR levels assuming that the user sets the mixer level to optimize the
dynamic range, and assuming that the analyzer and UUT distortions are incoherent. When the errors from the
UUT and the analyzer are incoherent, optimizing dynamic range is equivalent to minimizing the contribution of
analyzer noise and distortion to accuracy, though the higher mixer level increases the display scale fidelity
errors. This incoherent addition case is commonly used in the industry and can be useful for comparison of
analysis equipment, but this incoherent addition model is rarely justified. This derived accuracy specification is
based on a mixer level of −13 dBm.
m.Agilent measures 100% of the signal analyzers for dynamic range in the factory production process. This
measurement requires a near-ideal signal, which is impractical for field and customer use. Because field
verification is impractical, Agilent only gives a typical result. More than 80% of prototype instruments met this
“typical” specification; the factory test line limit is set commensurate with an on-going 80% yield to this typical.
The ACPR dynamic range is verified only at 2 GHz, where Agilent has the near-perfect signal available. The
dynamic range is specified for the optimum mixer drive level, which is different in different instruments and
different conditions. The test signal is a 1 DPCH signal.
The ACPR dynamic range is the observed range. This typical specification includes no measurement uncertainty.
Chapter 139
Agilent CXA Signal Analyzer
Power Suite Measurements
DescriptionSpecificationsSupplemental Information
Case: Radio Std = IS-95 or J-STD-008
Method
RBW method
a
ACPR Relative Accuracy
Offsets < 750 kHz
Offsets > 1.98 MHz
b
c
±0.08 dB
±0.11 dB
a. The RBW method measures the power in the adjacent channels within the defined resolution bandwidth. The noise
bandwidth of the RBW filter is nominally 1.055 times the 3.01 dB bandwidth. Therefore, the RBW method will
nominally read 0.23 dB higher adjacent channel power than would a measurement using the integration bandwidth
method, because the noise bandwidth of the integration bandwidth measurement is equal to that integration bandwidth. For cmdaOne ACPR measurements using the RBW method, the main channel is measured in a 3 MHz
RBW, which does not respond to all the power in the carrier. Therefore, the carrier power is compensated by the
expected under-response of the filter to a full width signal, of 0.15 dB. But the adjacent channel power is not compensated for the noise bandwidth effect.
The reason the adjacent channel is not compensated is subtle. The RBW method of measuring ACPR is very similar to the preferred method of making measurements for compliance with FCC requirements, the source of the
specifications for the cdmaOne Spur Close specifications. ACPR is a spot measurement of Spur Close, and thus is
best done with the RBW method, even though the results will disagree by 0.23 dB from the measurement made
with a rectangular passband.
b. The specified ACPR accuracy applies if the measured ACPR substantially exceeds the analyzer dynamic range at
the specified offset. When this condition is not met, there are additional errors due to the addition of analyzer spectral components to UUT spectral components. In the worst case at these offsets, the analyzer spectral components
are all coherent with the UUT components; in a more typical case, one third of the analyzer spectral power will be
coherent with the distortion components in the UUT. Coherent means that the phases of the UUT distortion components and the analyzer distortion components are in a fixed relationship, and could be perfectly in-phase. This
coherence is not intuitive to many users, because the signals themselves are usually pseudo-random; nonetheless,
they can be coherent.
When the analyzer components are 100% coherent with the UUT components, the errors add in a voltage sense.
That error is a function of the signal (UUT ACPR) to noise (analyzer ACPR dynamic range limitation) ratio, SN,
in decibels.
The function is error = 20 × log(1 + 10
For example, if the UUT ACPR is −62 dB and the measurement floor is −82 dB, the SN is 20 dB and the error due
to adding the analyzer distortion to that of the UUT is 0.83 dB.
−SN/20
)
c. As in footnote b, the specified ACPR accuracy applies if the ACPR measured substantially exceeds the analyzer
dynamic range at the specified offset. When this condition is not met, there are additional errors due to the addition
of analyzer spectral components to UUT spectral components. Unlike the situation in footnote
tral components from the analyzer will be non-coherent with the components from the UUT. Therefore, the errors
add in a power sense. The error is a function of the signal (UUT ACPR) to noise (analyzer ACPR dynamic range
limitation) ratio, SN, in decibels.
The function is error = 10 × log(1 + 10
For example, if the UUT ACPR is −75 dB and the measurement floor is −85 dB, the SN ratio is 10 dB and the error
due to adding the analyzer's noise to that of the UUT is 0.41 dB.
−SN/10
).
b, though, the spec-
40Chapter 1
Agilent CXA Signal Analyzer
Power Suite Measurements
DescriptionSpecificationsSupplemental Information
Power Statistics CCDF
Histogram Resolution
a
0.01 dB
a. The Complementary Cumulative Distribution Function (CCDF) is a reformatting of a histogram of the power
envelope. The width of the amplitude bins used by the histogram is the histogram resolution. The resolution of the
CCDF will be the same as the width of those bins.
DescriptionSpecificationsSupplemental Information
Burst Power
MethodsPower above threshold
Power within burst width
ResultsOutput power, average
Output power, single burst
Maximum power
Minimum power within burst
Burst width
Description SpecificationsSupplemental Information
Spurious EmissionsTable-driven spurious signals;
search across regions
Case: Radio Std = 3GPP W-CDMA
Dynamic Range
1 to 3.0 GHz
a
Sensitivity, absolute
86.6 dB91.6 dB (typical)
−75.4 dBm−80.4 dBm (typical)
1 to 3.0 GHz
Accuracy
Attenuation = 10 dB
Frequency Range
100 kHz to 3.0 GHz
3.0 GHz to 7.5 GHz
±0.81 dB (95th Percentile)
±1.41 dB (95th Percentile)
a. The dynamic is specified with the mixer level at +3 dBm, where up to 1 dB of compression can occur, degrading
a. The dynamic range specification is the ratio of the channel power to the power in the offset specified. The dynamic
range depends on the measurement settings, such as peak power or integrated power. Dynamic range specifications are
based on default measurement settings, with detector set to average, and depend on the mixer level. Default measure-
ment settings include 30 kHz RBW.
b. This dynamic range specification applies for the optimum mixer level, which is about −16 dBm. Mixer level is
defined to be the average input power minus the input attenuation.
c. The sensitivity is specified with 0 dB input attenuation. It represents the noise limitations of the analyzer. It is tested
without an input signal. The sensitivity at this offset is specified in the default 30 kHz RBW, at a center frequency of
2 GHz.
d. The relative accuracy is a measure of the ratio of the power at the offset to the main channel power. It applies for
spectrum emission levels in the offset s that are well above the dynamic range limitation.
e. The absolute accuracy of SEM measurement is the same as the absolute accuracy of the spectrum analyzer. See
“Amplitude Accuracy and Range” on page 19 for more information. The numbers shown are for 0 - 3.0 GHz, with
attenuation set to 10 dB.
42Chapter 1
Options
The following options and applications affect instrument specifications.
Power Consumption, Standby 20 WStandby power is not supplied to frequency reference
oscillator.
DescriptionSpecificationsSupplemental Information
Display
a
Resolution1024 × 768XGA
Size213 mm (8.4 in) diagonal (nominal)
Scale
Log Scale0.1, 0.2, 0.3...1.0, 2.0, 3.0...20 dB per
division
Linear Scale10% of reference level per division
UnitsdBm, dBmV, dBmA, Watts, Volts,
Amps, dBμV, d B μA
a. The LCD display is manufactured using high precision technology. However, there may be up to six bright points
(white, blue, red or green in color) that constantly appear on the LCD screen. These points are normal in the
manufacturing process and do not affect the measurement integrity of the product in any way.
Chapter 145
Agilent CXA Signal Analyzer
General
DescriptionSpecificationsSupplemental Information
Measurement Speed
a
Local measurement and display update rate
Remote measurement and LAN transfer rate
b
b
Nominal
11 ms (90/s) (nominal)
6 ms (167/s) (nominal)
Marker Peak Search 5 ms (nominal)
Center Frequency Tune and Transfer (RF) 22 ms (nominal)
Measurement/Mode Switching 75 ms (nominal)
a. Sweep Points = 101
b. Factory preset, fixed center frequency, RBW = 1 MHz, and span >10 MHz and ≤ 600 MHz, Auto Align Off.
DescriptionSpecificationsSupplemental Information
Data Storage
Internal Total
Internal Use
ExternalUSB 2.0 compatible memory devices
Integrated 40 GB HDD15 GB available on primary partition for
applications and secondary data
6 GB available on separate partition for user
data.
DescriptionSpecificationsSupplemental Information
Weight
(without options)
Net14 kg (31 lbs) (nominal)
Shipping 26 kg (57 lbs) (nominal)
Cabinet DimensionsCabinet dimensions exclude front and rear
protrusions.
Height177 mm (7.0 in)
Width426 mm (16.8 in)
Length368 mm (14.5 in)
46Chapter 1
Agilent CXA Signal Analyzer
Inputs/Outputs
Inputs/Outputs
Front Panel
DescriptionSpecificationsSupplemental Information
RF Input
Connector
StandardType-N female
Impedance50Ω (nominal)
DescriptionSpecificationsSupplemental Information
Probe Power
Voltage/Current+15 Vdc, ±7% at 150 mA max (nominal)
−12.6 Vdc, ±10% at 150 mA max (nominal)
GND
DescriptionSpecificationsSupplemental Information
USB 2.0 Ports
Master (2 ports)
ConnectorUSB Type “A” (female)
Output Current0.5 A (nominal)
DescriptionSpecificationsSupplemental Information
Headphone Jack
Connector3.5 mm (1/8 inch) miniature stereo audio jack
Output Power90 mW per channel into 16 W (nominal)
Chapter 147
Agilent CXA Signal Analyzer
Inputs/Outputs
Rear Panel
DescriptionSpecificationsSupplemental Information
10 MHz Out
ConnectorBNC female
Impedance50Ω (nominal)
Output Amplitude≥ 0 dBm (nominal)
Frequency10 MHz ± (10 MHz × frequency
reference accuracy)
DescriptionSpecificationsSupplemental Information
Ext Ref In
ConnectorBNC femaleNote: Analyzer noise sidebands and spurious
response performance may be affected by the
quality of the external reference used. See
footnote c in the phase noise specifications
within the Dynamic Range section
Impedance50Ω (nominal)
Input Amplitude Range−5 to +10 dBm (nominal)
Input Frequency10 MHz (nominal)
(Selectable to 1 Hz resolution)
Lock range
±5 × 10
reference input frequency
−6
of selected external
DescriptionSpecificationsSupplemental Information
Trigger Inputs
Trigger 1 In
ConnectorBNC female
Impedance 10 kΩ (nominal)
Trigger Level Range−5 to +5 V
DescriptionSpecificationsSupplemental Information
Trigger Outputs
Trigger 1 Out
ConnectorBNC female
Impedance 50Ω (nominal)
Level 5 V TTL
48Chapter 1
Agilent CXA Signal Analyzer
DescriptionSpecificationsSupplemental Information
Monitor Output
Connector
Format
Resolution
DescriptionSpecificationsSupplemental Information
Noise Source Drive +28 V
(Pulsed)
ConnectorBNC female
VGA compatible,
15-pin mini D-SUB
XGA (60 Hz vertical sync rates,
non-interlaced)
Analog RGB
1024 × 768
Inputs/Outputs
DescriptionSpecificationsSupplemental Information
SNS Series Noise SourceFor use with Agilent Technologies SNS
Series noise sources
DescriptionSpecificationsSupplemental Information
Analog Out
ConnectorBNC female
Impedance50Ω (nominal)
DescriptionSpecificationsSupplemental Information
SyncReserved for future use
ConnectorBNC female
DescriptionSpecificationsSupplemental Information
AUX IF OutReserved for future use. Use of this connector
This product is designed for use in Installation Category II and Pollution Degree 2 per IEC 61010 2nd
ed, and 664 respectively.
This product has been designed and tested in accordance with accepted industry standards, and has been
supplied in a safe condition. The instruction documentation contains information and warnings which
must be followed by the user to ensure safe operation and to maintain the product in a safe condition.
The CE mark is a registered trademark of the European Community (if accompanied by
a year, it is the year when the design was proven). This product complies with all
relevant directives.
ICES/NMB-001“This ISM device complies with Canadian ICES-001.”
“Cet appareil ISM est conforme a la norme NMB du Canada.”
ISM 1-A
(GRP.1 CLASS A)
This is a symbol of an Industrial Scientific and Medical Group 1 Class A product.
(CISPR 11, Clause 4)
The CSA mark is the Canadian Standards Association. This product complies with the
relevant safety requirements.
The C-Tick mark is a registered trademark of the Australian/New Zealand Spectrum
Management Agency. This product complies with the relevant EMC regulations.
This symbol indicates separate collection for electrical and electronic equipment
mandated under EU law as of August 13, 2005. All electric and electronic equipment
are required to be separated from normal waste for disposal (Reference WEEE
Directive 2002/96/EC).
To return unwanted products, contact your local Agilent office, or see
http://www.agilent.com/environment/product/index.shtml for more information.
Chapter 151
Agilent CXA Signal Analyzer
Declaration of Conformity
Declaration of Conformity
A copy of the Manufacturer’s European Declaration of Conformity for this instrument can be obtained
by contacting your local Agilent Technologies sales representative.
52Chapter 1
2Options P03 and P07 - Preamplifiers
This chapter contains specifications for the CXA Signal Analyzer Options P03 and P07 preamplifiers.
53
Options P03 and P07 - Preamplifiers
Specifications Affected by Preamp
Specifications Affected by Preamp
Specification NameInformation
Frequency RangeSee “Frequency Range” on page 11 of the core specifications.
Nominal Dynamic Range vs.
Offset Frequency vs. RBW
Measurement RangeThe measurement range depends on DANL.
Gain CompressionSee “Preamplifier” on page 27 of the core specifications.
DANLSee “Preamplifier” on page 27 of the core specifications.
Frequency ResponseSee “Frequency Response” on page 20 of the core specifications.
Absolute Amplitude AccuracySee “Absolute Amplitude Accuracy” on page 22 of the core specifications.
RF Input VSWRSee “RF Input VSWR” on page 23 of the core specifications.
Second Harmonic DistortionSee “Second Harmonic Distortion” on page 30 of the core specifications.
Does not apply with Preamp On.
See “Measurement Range” on page 19 of the core specifications.
Third Order Intermodulation
Distortion
GainSee “Preamplifier” on page 27 of the core specifications.
54Chapter 2
See “Third Order intermodulation Distortion” on page 31 of the core
specifications.
3I/Q Analyzer
This chapter contains specifications for the I/Q Analyzer measurement application (Basic Mode).
55
I/Q Analyzer
Specifications Affected by I/Q Analyzer
Specifications Affected by I/Q Analyzer
Specification NameInformation
Number of Frequency Display Trace Points
(buckets)
Resolution BandwidthSee Frequency specifications in this chapter.
Video BandwidthNot available.
Clipping-to-Noise Dynamic RangeSee Clipping-to-Noise Dynamic Range specifications in this
Resolution Bandwidth Switching
Uncertainty
Available DetectorsDoes not apply.
Spurious ResponsesSee “Spurious Response” on page 30 of core specifications.
Does not apply.
chapter.
Not specified because it is negligible.
IF Amplitude FlatnessSee ““Absolute Amplitude Accuracy” on page 22 of core
specifications.
IF Phase LinearitySee “Amplitude and Phase” on page 59.
Data AcquisitionSee Data Acquisition specifications in this chapter.
56Chapter 3
Frequency
I/Q Analyzer
Frequency
DescriptionSpecifications
Frequency Range
Option 5039 kHz to 3 GHz
Option 5079 kHz to 7.5 GHz
Frequency Span
Range10 Hz to 10 MHz
Resolution Bandwidth
(Spectrum Measurement)
Range
Overall
Span = 1 MHz
Span = 10 kHz
Span = 100 Hz
Window ShapesFlat Top, Uniform, Hanning, Hamming,
100 mHz to 3 MHz
50 Hz to 1 MHz
1 Hz to 10 kHz
100 mHz to 100 Hz
Gaussian, Blackman, Blackman-Harris,
Kaiser Bessel (K-B 70 dB, K-B 90 dB & K-B
110 dB)
Supplemental
Information
Analysis Bandwidth (Span)
(Waveform Measurement)
10 Hz to 10 MHzStandard instrument
Chapter 357
I/Q Analyzer
Frequency
DescriptionSpecificationsSupplemental Information
Clipping-to-Noise Dynamic Range
a
Excluding residuals and spurious
responses
Clipping Level at MixerCenter frequency ≥ 20 MHz
IF Gain = Low−12 dBm (nominal)
IF Gain = High−22 dBm (nominal)
Noise Density at Mixer
at center frequency
b
DANL
c
+ 2.25 dB
d
a. This specification is defined to be the ratio of the clipping level (also known as “ADC Over Range”) to
the noise density. In decibel units, it can be defined as clipping_level [dBm] − noise_density [dBm/Hz];
the result has units of dBfs/Hz (fs is “full scale”).
b. The noise density depends on the input frequency. It is lowest for a broad range of input frequencies
near the center frequency, and these specifications apply there. The noise density can increase toward
the edges of the span. The effect is nominally well under 1 dB.
c. The primary determining element in the noise density is the “Displayed Average Noise Level” on page
29.
d. DANL is specified for log averaging, not power averaging, and thus is 2.51 dB lower than the true
noise density. It is also specified in the narrowest RBW, 1 Hz, which has a noise bandwidth slightly
wider than 1 Hz. These two effects together add up to 2.25 dB.
58Chapter 3
I/Q Analyzer
Amplitude and Phase
Amplitude and Phase
DescriptionSpecificationSupplemental Information
IF Amplitude FlatnessSee “IF Frequency Response” on page 21
of core specifications.
DescriptionSpecificationSupplemental Information
IF Phase Linearity
Relative to mean phase linearity
Freq
(GHz)
≤ 3≤ 10±0.5 deg0.2 deg
3 to 7.5≤ 10±1.5 deg0.4 deg
a. The listed performance is the r.m.s. of the phase deviation relative to the mean phase deviation from a
linear phase condition, where the r.m.s. is computed over the range of offset frequencies and center
frequencies shown.
Span
(MHz)
Peak (nominal)
RMS (nominal)
a
Chapter 359
I/Q Analyzer
Data Acquisition
Data Acquisition
DescriptionSpecificationsSupplemental Information
Time Record Length4,000,000 samples (max)4,000,000 samples ≈ 88.89 ms at
10 MHz span
Sample Rate90 MSa/s for 10 MHz
ADC Resolution14 Bits
60Chapter 3
4Analog Demodulation Measurement
Application
This chapter contains specifications for the W9063A Analog Demodulation Measurement Application.
61
Analog Demodulation Measurement Application
Analog Demodulation Performance - Pre-Demodulation
Analog Demodulation Performance - Pre-Demodulation
DescriptionSpecificationsSupplemental Information
Carrier Frequency
Maximum Frequency
Option 503
Option 507
Minimum Frequency9 kHz
Demodulation Bandwidth8 MHz
3.0 GHz
7.5 GHz
Capture Memory
sample rate * demod time
250 kSaEach sample is an I/Q pair.
62Chapter 4
Analog Demodulation Measurement Application
Analog Demodulation Performance - Post-Demodulation
Analog Demodulation Performance - Post-Demodulation
DescriptionSpecificationsSupplemental Information
Maximum Audio
Frequency Span4 MHz
Filters
Low Pass
High Pass
Band Pass
Deemphasis
300 Hz, 3 kHz, 15 kHz, 30 kHz,
80 kHz, 300 kHz
20 Hz, 50 Hz, 300 Hz
CCITT
25 μs, 50 μs, 75 μs, 750 μsFM only
Chapter 463
Analog Demodulation Measurement Application
Frequency Modulation - Level and Carrier Metrics
Frequency Modulation - Level and Carrier Metrics
DescriptionSpecificationsSupplemental Information
FM Deviation Accuracy
Rate: 1 kHz - 1 MHz,
Deviation: 1 - 100 kHz
FM Rate Accuracy
Rate: 1 kHz - 1 MHz
Carrier Frequency Error±0.5 Hz (nominal)
Carrier Power±0.85 dB (nominal)
a
ab
±(1% of (rate + deviation) +
20 Hz) (nominal)
±0.2 Hz (nominal)
Assumes signal still visible in
channel BW with offset
a. For optimum measurement of rate and deviation, ensure that the channel bandwidth is set
wide enough to capture the significant RF energy (as visible in the RF Spectrum window).
Setting the channel bandwidth too wide will result in measurement errors.
b. Rate accuracy at high channel bandwidths assumes that the deviation is sufficiently large to
overcome channel noise.
64Chapter 4
DescriptionSpecificationsSupplemental Information
Residual
Rate: 1 - 10 kHz,
Deviation: 5 kHz
Analog Demodulation Measurement Application
Frequency Modulation - Distortion
Frequency Modulation - Distortion
THD
Distortion
SINAD
Absolute Accuracy
Rate: 1 - 10 kHz,
Deviation: 5 kHz
THD
Distortion
SINAD
AM Rejection
AF 100 Hz - 15 kHz
50% Modulation Depth
Residual FM
RF 100 kHz - 7.5 GHz150 Hz (nominal)
0.2% (nominal)
3% (nominal)
32 dB (nominal)
±2% of measured value + residual (nominal)
Measured 2
±2% of measured value + residual (nominal)
±0.4 dB + effect of residual (nominal)
150 Hz (nominal)
nd
and 3rd harmonics
Measurement Range
Rate: 1 - 10 kHz,
Deviation: 5 kHz
THD
Distortion
SINAD
residual to 100% (nominal)
Measured 2nd and 3rd harmonics
Measurement includes at most 10 harmonics
residual to 100% (nominal)
0 dB to residual (nominal)
Chapter 465
DescriptionSpecificationsSupplemental Information
AM Depth Accuracy
Analog Demodulation Measurement Application
Amplitude Modulation - Level and Carrier Metrics
Amplitude Modulation - Level and Carrier Metrics
Rate: 1 kHz - 1 MHz
AM Rate Accuracy
Rate: 1 kHz - 1 MHz
Carrier Power±0.85 dB (nominal)
±0.2% + 0.002 × measured value (nominal)
±0.05 Hz (nominal)
66Chapter 4
DescriptionSpecificationsSupplemental Information
Residual
Depth: 50%
Rate: 1 - 10 kHz
Analog Demodulation Measurement Application
Amplitude Modulation - Distortion
Amplitude Modulation - Distortion
THD
Distortion
SINAD
Absolute Accuracy
Depth: 50%
Rate: 1 - 10 kHz
THD
Distortion
SINAD
FM Rejection0.5% (nominal)
Residual AM
0.16% (nominal)
0.3% (nominal)
50 dB (nominal)
±1% of measured value +
residual (nominal)
Measured 2
±1% of measured value +
residual (nominal)
±0.05 dB + effect of residual (nominal)
AF + deviation < 0.5 × channel BW
AF < 0.1 × channel BW
nd
and 3rd harmonics
RF 100 kHz - 7.5 GHz0.2% (nominal)
Measurement Range
Depth: 50%
Rate: 1 - 10 kHz
THD
Distortion
SINAD
Chapter 467
residual to 100%
Measured 2nd and 3rd harmonics
Measurement includes at most 10 harmonics
residual to 100%
0 dB to residual
Analog Demodulation Measurement Application
Phase Modulation - Level and Carrier Metrics
Phase Modulation - Level and Carrier Metrics
DescriptionSpecificationsSupplemental Information
PM Deviation Accuracy
Rate: 1 - 20 kHz
Deviation: 0.2 to 6 rad
PM Rate Accuracy
Rate: 1 - 10 kHz
Carrier Frequency Error±0.02 Hz (nominal)
Carrier Power±0.85 dB (nominal)
a
±100%× (0.005 + (rate/1 MHz))
(nominal)
±0.2 Hz (nominal)
Assumes signal still visible in
channel BW with offset.
a. For optimum measurement of PM rate and deviation, ensure that the channel bandwidth is set
wide enough to capture the significant RF energy (as visible in the RF Spectrum window).
Setting the channel bandwidth too narrow or too wide will result in measurement errors.
residual to 100%
Measured 2nd and 3rd harmonics
Measurement includes at most 10 harmonics
residual to 100%
0 dB to residual
Chapter 469
Analog Demodulation Measurement Application
Phase Modulation - Distortion
70Chapter 4
5Phase Noise Measurement Application
This chapter contains specifications for the W9068A Phase Noise measurement application.
71
Phase Noise Measurement Application
General Specifications
General Specifications
DescriptionSpecificationsSupplemental Information
Maximum Carrier Frequency
Option 503 3 GHz
Option 507 7.5 GHz
DescriptionSpecificationsSupplemental Information
Measurement Characteristics
MeasurementsLog plot
RMS noise
RMS jitter
Residual FM
Spot frequency
Maximum number of decadesdepends on Frequency Offset
a
range
a. See Frequency Offset – Range.
72Chapter 5
DescriptionSpecificationsSupplemental Information
Measurement Accuracy
Phase Noise Measurement Application
General Specifications
Phase Noise Density Accuracy
Default settings
c
Overdrive On setting
RMS Markers
ab
±0.90 dB
±0.88 dB (nominal)
See equation
d
a. This does not include the effect of system noise floor. This error is a function of the signal (phase noise
of the DUT) to noise (analyzer noise floor due to phase noise and thermal noise) ratio, SN, in decibels.
The function is: error = 10 × log(1 + 10
−SN/10
)
For example, if the phase noise being measured is 10 dB above the measurement floor, the error due to
adding the analyzer’s noise to the UUT is 0.41 dB.
b. Offset frequency errors also add amplitude errors. See the Offset frequency section, below.
c. The phase noise density accuracy is derived from warranted analyzer specifications. It applies with
default settings and a 0 dBm carrier at 1 GHz. Most notable about the default settings is that the Overdrive (in the advanced menu of the Meas Setup menu) is set to Off.
d. The accuracy of an RMS marker such as “RMS degrees” is a fraction of the readout. That fraction, in per-
cent, depends on the phase noise accuracy, in dB, and is given by 100 × (10
PhaseNoiseDensityAccuracy / 20
1). For example, with +0.30 dB phase noise accuracy, and with a marker reading out 10 degrees RMS, the
accuracy of the marker would be +3.5% of 10 degrees, or +0.35 degrees.
DescriptionSpecificationsSupplemental Information
−
Amplitude Repeatability
< 1 dB (nominal)
a
(No Smoothing, all offsets, default
settings, including average = 10)
a. Standard deviation. The repeatability can be improved with the use of smoothing and increasing
number of averages.
Chapter 573
Phase Noise Measurement Application
General Specifications
DescriptionSpecificationsSupplemental Information
Offset Frequency
Range3 Hz to (ƒ
− ƒCF)
opt
: Maximum frequency determined by option
ƒ
opt
ƒCF: Carrier frequency of signal under test
Accuracy
Offset < 1 MHz
Offset ≥ 1 MHz
Negligible error (nominal)
±(0.5% of offset + marker resolution) (nominal)
0.5% of offset is equivalent to 0.0072 octave
a. For example, ƒ
is 3.0 GHz for Option 503.
opt
b. The frequency offset error in octaves causes an additional amplitude accuracy error proportional to the
product of the frequency error and slope of the phase noise. For example, a 0.01 octave frequency error
combined with an 18 dB/octave slope gives 0.18 dB additional amplitude error.
Nominal Phase Noise at Different Center Frequencies
See the plot of basebox Nominal Phase Noise on page 36.
a
b
74Chapter 5
6Noise Figure Measurement Application
This chapter contains specifications for the W9069A Noise Figure Measurement Application.
75
Noise Figure Measurement Application
General Specification
General Specification
DescriptionSpecificationsSupplemental Information
Noise Figure
≤10 MHz
10 MHz to 7.5 GHzUsing internal preamp (such as
Noise Source ENR
4 to 6.5 dB
12 to 17 dB0 to 30 dB±0.05 dB
20 to 22 dB0 to 35 dB±0.1 dB
b
Measurement RangeInstrument
Uncertainty
0 to 20 dB±0.05 dB
c
Uncertainty Calculator
Option P07) and RBW = 4 MHz
a
a. The figures given in the table are for the uncertainty added by the CXA Signal Analyzer instrument
only. To compute the total uncertainty for your noise figure measurement, you need to take into
account other factors including: DUT NF, Gain and Match, Instrument NF, Gain Uncertainty and
Match; Noise source ENR uncertainty and Match. The computations can be performed with the
uncertainty calculator included with the Noise Figure Measurement Personality. Go to Mode Setup
then select Uncertainty Calculator. Similar calculators are also available on the Agilent web site;
go to
http://www.agilent.com/find/nfu.
b. Uncertainty performance of the instrument is nominally the same in this frequency range as in the
higher frequency range. However, performance is not warranted in this range. There is a paucity of
available noise sources in this range, and the analyzer has poorer noise figure, leading to higher
uncertainties as computed by the uncertainty calculator.
c. “Instrument Uncertainty” is defined for noise figure analysis as uncertainty due to relative amplitude
uncertainties encountered in the analyzer when making the measurements required for a noise figure
computation. The relative amplitude uncertainty depends on, but is not identical to, the relative
display scale fidelity, also known as incremental log fidelity. The uncertainty of the analyzer is
multiplied within the computation by an amount that depends on the Y factor to give the total
uncertainty of the noise figure or gain measurement.
See Agilent App Note 57-2, literature number 5952-3706E for details on the use of this specification.
Jitter (amplitude variations) will also affect the accuracy of results. The standard deviation of the
measured result decreases by a factor of the square root of the Resolution Bandwidth used and by the
square root of the number of averages. This application uses the 4 MHz Resolution Bandwidth as
default since this is the widest bandwidth with uncompromising accuracy.
76Chapter 6
Gain
Noise Figure Measurement Application
General Specification
DescriptionSpecificationsSupplemental Information
Instrument Uncertainty
<10 MHz
10 MHz to 7.5 GHz
–20 to +30 dB±0.20 dB
+30 to +40 dB±0.20 dB±0.20 dB (nominal)
b
DUT Gain Range
a
a. “Instrument Uncertainty” is defined for gain measurements as uncertainty due to relative
amplitude uncertainties encountered in the analyzer when making the measurements required for
the gain computation.
See Agilent App Note 57-2, literature number 5952-3706E for details on the use of this
specification.
Jitter (amplitude variations) will also affect the accuracy of results. The standard deviation of the
measured result decreases by a factor of the square root of the Resolution Bandwidth used and
by the square root of the number of averages. This application uses the 4 MHz Resolution
Bandwidth as default since this is the widest bandwidth with uncompromising accuracy.
b. Uncertainty performance of the instrument is nominally the same in this frequency range as in
the higher frequency range. However, performance is not warranted in this range. There is a
paucity of available noise sources in this range, and the analyzer has poorer noise figure, leading to higher uncertainties as computed by the uncertainty calculator.
Chapter 677
Noise Figure Measurement Application
General Specification
DescriptionSpecificationsSupplemental Information
Noise Figure Uncertainty Calculator
a
Instrument Noise Figure UncertaintySee the Noise Figure
table earlier in this
chapter
Instrument Gain UncertaintySee the Gain table
earlier in this chapter
Instrument Noise FigureSee graphs of “Nominal Instrument
Noise Figure”; Noise Figure is DANL
+176.24 dB (nominal)
b
Instrument Input MatchSee graphs: Nominal VSWR
a. The Noise Figure Uncertainty Calculator requires the parameters shown in order to calculate the total
uncertainty of a Noise Figure measurement.
b. Nominally, the noise figure of the spectrum analyzer is given by
NF = D − (K − L + N − B)
where D is the DANL (displayed average noise level) specification,
K is kTB (−173.98 dB in a 1 Hz bandwidth at 290 K)
L is 2.51 dB (the effect of log averaging used in DANL verifications)
N is 0.24 dB (the ratio of the noise bandwidth of the RBW filter with which DANL is
specified to an ideal noise bandwidth)
B is ten times the base-10 logarithm of the RBW (in hertz) in which the DANL is
specified. B is 0 dB for the 1 Hz RBW.
The actual NF will vary from the nominal due to frequency response errors.
78Chapter 6
Noise Figure Measurement Application
Nominal Instrument Noise Figure
General Specification
NF(dB)
14
13
12
11
10
9
8
0.00.51.01.52.02.53.0
NF (dB)
24
22
20
18
Nominal Instrument NF, 0.01 to 3.0 GHz, 0 dB Attenuation, Pr eamp On
Nominal Instrument NF, 3.0 to 7.5 GHz, 0 dB Attenuation, Preamp On
GHz
16
14
12
3.03.54.04.55.05.56.06.57.07.5
GHz
Chapter 679
Noise Figure Measurement Application
General Specification
Nominal Instrument Input VSWR
VSWR
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.00.51.01.52.02.53.0
VSWR
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
3.03.54.04.55.05.56.06.57.07.5
VSWR vs. Freque ncy, 3 Units, Preamp On, 0 dB Attenuation
VSWR vs. Freque ncy, 3 Units, Preamp On, 0 dB Attenuation
GHz
GHz
80Chapter 6
7VXA Measurement Application
This chapter contains specifications for the VXA Measurement Application.
Additional Definitions and Requirements
Because digital communications signals are noise-like, all measurements will have variations. The
specifications apply only with adequate averaging to remove those variations.
Specifications
These specifications summarize the performance for the CXA Signal Analyzer and apply to the VXA
measurement application inside the analyzer. Unless stated otherwise, these are typical values, not
warranted. Please refer to the signal analyzer specification guide for spectrum analysis performance.
81
VXA Measurement Application
X-Series Signal Analyzer Performance (Option 205)
X-Series Signal Analyzer Performance
(Option 205)
Frequency
DescriptionSpecificationsSupplemental Information
Range
Maximum Frequency
Option 5033.0 GHz
Option 5077.5 GHz
Preamp Option P033.0 GHz
Preamp Option P077.5 GHz
Minimum Frequency
PreampAC Coupled
Off9 kHz
On100 kHz
Center Frequency Tuning
Resolution1 mHz
Frequency Span10 MHz (standard)
Frequency Points per SpanCalibrated points: 51 to 409,601
Displayed points: 51 to 524,288
82Chapter 7
VXA Measurement Application
X-Series Signal Analyzer Performance (Option 205)
Resolution Bandwidth (RBW)
DescriptionSpecificationsSupplemental Information
Range
RBWs range from less than 1 Hz
to greater than 2.8 MHz (standard)
RBW
Shape Factor
Selectivity Passband Flatness Rejection
Flat Top 0.41 0.01 dB > 95 dBc
Gaussian Top 0.25 0.68 dB > 125 dBc
Hanning 0.11 1.5 dB > 31 dBc
Uniform 0.0014 4.0 dB > 13 dBc
Input
The range of available RBW choices is
a function of the selected frequency
span and the number of calculated
frequency points. Users may step
through the available range in a 1-3-10
sequence or directly enter an arbitrarily
chosen bandwidth.
The window choices below allow the
user to optimize the RBW shape as
needed for best amplitude accuracy,
best dynamic range, or best response to
transient signal characteristics.
DescriptionSpecificationsSupplemental Information
RangeFull Scale, combines attenuator
setting and ADC gain
−20 dBm to 20 dBm, 10 dB steps
−20 dBm to 22 dBm, 2 dB steps
−40 dBm to 20 dBm, 10 dB steps, up to 3 GHz
−40 dBm to 22 dBm, 2 dB steps, up to 3 GHz
ADC overload+2 dBfs
standard
Option FSA
Option P03
Option P03 and FSA
Chapter 783
VXA Measurement Application
X-Series Signal Analyzer Performance (Option 205)
Amplitude Accuracy
DescriptionSpecificationsSupplemental Information
Absolute Amplitude
Accuracy
Frequency
<3.0 GHz
Amplitude Linearity
Level
−5 dBfs to 0 dBfs
−70 dBfs to −5 dBfs
IF Flatness
Frequency
≤3.0 GHz
3.0 GHz to 7.5 GHz
Sensitivity−144 dBm/Hz
Linearity
±0.30 dB
±0.15 dB
Flatness
±0.45 dB
10 MHz to 2.2 GHz, −20 dBm range
−160 dBm/Hz
10 MHz to 2.2 GHz, −40 dBm range
(requires P03 preamp option)
95% confidence accuracy
±0.60 dB
RMS (nominal)
0.03 dB
0.25 dB
84Chapter 7
Dynamic Range
VXA Measurement Application
X-Series Signal Analyzer Performance (Option 205)
DescriptionSpecifications
Third-order intermodulation
distortion
Noise Density at 1 GHz
Input Range
≥−10 dBm
−20 dBm to −12 dBm
−30 dBm to −22 dBm
−40 dBm to −32 dBm
Residual Responses−100 dBm (nominal)
Input related spurious
10 MHz to 7.5 GHz,
Mixer level ≤ −30 dBm
(Input signal ≤ −20 dBfs with range
≥−10 dBm)
−66 dBc (nominal)
Two −10 dBfs tones,
400 MHz to 7.5 GHz,
tone separation ≥ 100 kHz
Density
−134 dBfs/Hz
−124 dBfs/Hz
−130 dBfs/Hz (requires P0x preamp option)
−120 dBfs/Hz (requires P0x preamp option)
−60 dBc (typical)
Supplemental
Information
Other spurious
200 Hz < f < 10 MHz from carrier−65 dBc (nominal)
Chapter 785
VXA Measurement Application
Analog Modulation Analysis (Option 205)
Analog Modulation Analysis (Option 205)
DescriptionSpecificationsSupplemental Information
AM Demodulation
Carrier ≤ −17 dBfs
Demodulator BandwidthSame as selected measurement span
Modulation Index Accuracy±1%
Harmonic Distortion−50 dBc relative to
100% modulation index
Spurious−60 dBc relative to
100% modulation index
Cross Demodulation< 1.1%AM on an FM signal with
50 kHz modulation rate,
200 kHz deviation
PM DemodulationDeviation < 180°,
modulation rate ≤ 500 kHz
Demodulator BandwidthSame as selected measurement span,
except as noted
Modulation Index Accuracy±0.5°
Harmonic Distortion−55 dBc
Spurious−60 dBc
Cross Demodulation80% modulation index AM signal;
modulation rate ≤ 1 MHz;
1°, up to 3 GHz
86Chapter 7
Analog Modulation Analysis (Option 205)
DescriptionSpecificationsSupplemental Information
FM Demodulation
Demodulator BandwidthSame as selected measurement span
Modulation Index Accuracy±0.1% of span, deviation < 2 MHz,
modulation rate ≤500 kHz
Harmonic Distortion
VXA Measurement Application
Modulation Rate
< 50 kHz
≤500 kHz
Spurious
Modulation Rate
≤50 kHz
≤500 kHz
Cross Demodulation< 0.5% of span of FM on an 80% modulation
Deviation
≤200 kHz
≤2 MHz
Deviation
≤200 kHz
≤2 MHz
Distortion
−50 dBc
−45 dBc
Distortion
−50 dBc
−45 dBc
index AM signal, modulation rate ≤1 MHz
Chapter 787
VXA Measurement Application
Vector Modulation Analysis (Option AYA)
Vector Modulation Analysis (Option AYA)
DescriptionSpecificationsSupplemental Information
AccuracyFormats other than FSK, 8/16VSB, 16/32 APSK, and
OQPSK; Conditions: Full scale signal, fully contained
in the measurement span, frequency < 3.0 GHz, random
data sequence, range ≥ –30 dBm, start frequency ≥ 15%
of span, alpha/BT ≥ 0.3 (0.3 to 0.7 for OQPSK), and
symbol rate ≥ 1 kHz. For symbol rates < 1 kHz,
accuracy may be limited by phase noise. Averaging = 10
Residual ErrorsResult = 150 symbols
averages = 10
Residual EVM
Span
≤100 kHz
≤1 MHz
≤10 MHz
Magnitude Error
Span
≤100 kHz
≤1 MHz
≤10 MHz
Phase Error
Span
≤100 kHz
≤1 MHz
≤10 MHz
Frequency ErrorSymbol rate/500,000Added to frequency accuracy if applicable
IQ Origin Offset−60 dB or better
Video Modulation Formats
Residual EVM
8/16 VSB
EVM
0.80% rms
1.00% rms
1.00% rms
Error
0.60% rms
0.60% rms
1.00% rms
Error
0.7° rms
0.8° rms
0.8° rms
≤1.5% (SNR ≥36 dB)Symbol rate = 10.762 MHz,
α= 0.115, frequency < 3.0 GHz,
7 MHz span, full-scale signal,
range ≥−30 dBm,
result length = 800, averages = 10