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Manual Part Number
N9038-90048
Edition
Edition 1, November 2020
Supersedes: none
Published by:
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This chapter contains the specifications for the EMI receiver. The specifications
and characteristics for the measurement applications and options are covered
in the chapters that follow.
11
Keysight MXE EMI Receiver
Definitions and Requirements
Definitions and Requirements
This book contains EMC receiver 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 (≈2σ) of
performance tolerances 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.
Conditions Required to Meet Specifications
The following conditions must be met for the receiver to meet its
specifications.
•The receiver is within its calibration cycle. See the General section of this
chapter.
•Under auto couple control, except that Auto Sweep Time Rules = Accy.
•For signal frequencies <10 MHz, DC coupling applied.
•Any receiver 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 receiver 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 receiver may fail to meet specifications without informing the
user. If Auto Align is set to Light, performance is not warranted, and
nominal performance will degrade to become a factor of 1.4 wider for any
specification subject to alignment, such as amplitude tolerances.
12 Keysight N9038B MXE Specification Guide
Keysight MXE EMI Receiver
Definitions and Requirements
Certification
Keysight Technologies certifies that this product met its published
specifications at the time of shipment from the factory. Keysight Technologies
further certifies that its calibration measurements are traceable to the
International System of Units (SI) via national metrology institutes
(www.keysight.com/find/NMI) that are signatories to the CIPM Mutual
Recognition Arrangement.
a. AC Coupled only applicable to Freq Options 503, 508 and 526.
b. N is the LO multiplication factor. For negative mixing modes (as indicated by the “−” in the “Harmonic Mixing
Mode” column), the desired 1st LO harmonic is higher than the tuned frequency by the 1st IF (5.1225 GHz for
band 0, 322.5 MHz for all other bands).
14 Keysight N9038B MXE Specification Guide
Keysight MXE EMI Receiver
Frequency and Time
c. In the band overlap regions, for example, 3.5 to 3.6 GHz, the receiver may use either band for measurements, in
this example Band 0 or Band 1. The receiver gives preference to the band with the better overall specifications
(which is the lower numbered band for all frequencies below 26 GHz), but will choose the other band if doing so
is necessary to achieve a sweep having minimum band crossings. For example, with CF = 3.58 GHz, with a span
of 40 MHz or less, the receiver uses Band 0, because the stop frequency is 3.6 GHz or less, allowing a span
without band crossings in the preferred band. If the span is between 40 and 160 MHz, the receiver uses Band 1,
because the start frequency is above 3.5 GHz, allowing the sweep to be done without a band crossing in Band
1, though the stop frequency is above 3.6 GHz, preventing a Band 0 sweep without band crossing. With a span
greater than 160 MHz, a band crossing will be required: the receiver scans up to 3.6 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
(3.58 GHz), the preferred band is band 0 (indicated as frequencies under 3.6 GHz) and the alternate band is
band 1 (3.5 to 8.4 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 3.58 GHz. If the
sweep has been configured so that the signal at 3.58 GHz is measured in Band 1, the analysis behavior is nominally as stated in the Band 1 specification line (3.5 to 8.4 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 “3.5 to 8.4 GHz” represent nominal performance from 3.5 to 3.6 GHz, and
warranted performance from 3.6 to 8.4 GHz.
Keysight N9038B MXE Specification Guide 15
Keysight MXE EMI Receiver
Frequency and Time
DescriptionSpecificationsSupplemental Information
Standard Frequency Reference
Accuracy±[(time since last adjustment ×
aging rate) +
temperature stability +
b
calibration accuracy
]
Temperature Stability
−6
20 to 30°C
Full temperature range
Aging Rate
±2 × 10
±2 × 10
±1 × 10
−6
−6
/year
a
Achievable Initial Calibration Accuracy
Settability
±1.4 × 10
±2 × 10
−6
−8
Residual FM
(Center Frequency = 1 GHz
10 Hz RBW, 10 Hz VBW)
Precision Frequency Reference
Accuracy±[(time since last adjustment ×
aging rate) + temperature
stability + calibration accuracy
Temperature Stability
20 to 30°C
Full temperature range
±1.5 × 10
±5 × 10
−8
−8
Aging Rate
Total Aging
1 Year
±1 × 10
−7
b]c
≤10 Hz × N
(nominal)
−10
±5 × 10
f
p-p in 20 ms
/day (nominal)
−9
−8
−7
Nominal
±1 × 10
±1 × 10
−7
of final frequency
−8
of final frequency
2 Years
Settability
Warm-up and Retrace
d
300 s after turn on
900 s after turn on
Achievable Initial Calibration Accuracy
±1.5 × 10
±2 × 10
e
±4 × 10
16 Keysight N9038B MXE Specification Guide
Keysight MXE EMI Receiver
Frequency and Time
DescriptionSpecificationsSupplemental Information
Standby power to reference oscillatorNot supplied
Residual FM
(Center Frequency = 1 GHz
≤0.25 Hz × N
(nominal)
f
p-p in 20 ms
10 Hz RBW, 10 Hz VBW)
a. For periods of one year or more.
b. Calibration accuracy depends on how accurately the frequency standard was adjusted to 10 MHz. If the adjust-
ment procedure is followed, the calibration accuracy is given by the specification “Achievable Initial Calibration
Accuracy.”
c. The specification applies after the receiver has been powered on for four hours.
d. Standby mode does not apply power to the oscillator. Therefore warm-up applies every time the power is
turned on. The warm-up reference is one hour after turning the power on. Retracing also occurs every time
warm-up occurs. The effect of retracing is included within the “Achievable Initial Calibration Accuracy” term of
the Accuracy equation.
e. The achievable calibration accuracy at the beginning of the calibration cycle includes these effects:
1) Temperature difference between the calibration environment and the use environment
2) Orientation relative to the gravitation field changing between the calibration environment and the use envi-
ronment
3) Retrace effects in both the calibration environment and the use environment due to turning the instrument
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 2% of RBW for RBWs from 1 Hz to 390 kHz, 4% of RBW from 430 kHz through 3 MHz (the
widest autocoupled RBW), and 30% of RBW for the (manually selected) 4, 5, 6 and 8 MHz RBWs.
First example: a 120 MHz span, with autocoupled RBW. The autocoupled ratio of span to RBW is 106:1, so
the RBW selected is 1.1 MHz. The 5% × RBW term contributes only 55 kHz to the total frequency readout accu-
racy, compared to 300 kHz for the 0.0.25% × span term, for a total of 355 kHz. In this example, if an instrument
had an unusually high RBW centering error of 7% of RBW (77 kHz) and a span error of 0.20% of span (240 kHz),
the total actual error (317 kHz) would still meet the computed specification (355 kHz).
Second 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 sweep 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. Specifications apply to traces in most cases, but there are exceptions. Specifications always apply to the peak
detector. Specifications apply when only one detector is in use and all active traces are set to Clear Write. Specifications also apply when only one detector is in use in all active traces and the "Restart" key has been pressed
since any change from the use of multiple detectors to a single detector. In other cases, such as when multiple
simultaneous detectors are in use, additional errors of 0.5, 1.0 or 1.5 sweep points will occur in some detectors,
depending on the combination of detectors in use.
d. In most cases, the frequency readout accuracy of the receiver can be exceptionally good. As an example, Key-
sight has characterized the accuracy of a span commonly used for Electro-Magnetic Compatibility (EMC) testing
using a source frequency locked to the receiver. 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 point
s 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 receiver 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 bucket quantization limitation were negligible.
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 receiver, the specified count
accuracy is ±0.100 Hz under the test conditions of footnote a. This error is a noisiness of the result. It will
increase with noisy sources, wider RBWs, lower S/N ratios, and source frequencies > 1 GHz.
DescriptionSpecificationsSupplemental Information
Frequency Span
Range
Swept and FFT
Option 5030 Hz, 10 Hz to 3.6 GHz
Option 5080 Hz, 10 Hz to 8.4 GHz
Option 5260 Hz, 10 Hz to 26.5 GHz
Option 5440 Hz, 10 Hz to 44 GHz
Resolution2 Hz
Span Accuracy
Stepped
Swept
FFT
±(0.25% × span + horizontal resolution
±(0.25% × span + horizontal resolution
±(0.1% × span + horizontal resolution
a
)
a
)
a
)
a. Horizontal resolution is due to the marker reading out one of the sweep 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.
a. Delayed trigger is available with line, video, RF burst and external triggers.
±0.01% (nominal)
±40% (nominal)
±0.01% (nominal)
20 Keysight N9038B MXE Specification Guide
Keysight MXE EMI Receiver
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
+ 2 dB (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 envelope in a bandwidth wider
than the FFT width
RF Burst
Level Range
b
to −10 dBm plus attenuation (nominal)
−50
Level Accuracy±2 dB + Absolute Amplitude Accuracy (nominal)
Bandwidth (−10 dB)
Most cases 16 MHz (nominal)
Sweep Type = FFT;
30 MHz (nominal)
FFT Width = 25 MHz;
Span ≥ 8 MHz
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 listed
above.
External TriggersSee “Trigger Inputs (Trigger 1 In, Trigger 2 In)”
on page 74
a. The highest allowed mixer level depends on the IF Gain. It is nominally –10 dBm for Preamp Off and IF Gain =
Low.
b. Noise will limit trigger level range at high frequencies, such as above 15 GHz.
Keysight N9038B MXE Specification Guide 21
Keysight MXE EMI Receiver
Frequency and Time
DescriptionSpecificationsSupplemental Information
Gated Sweep
Gate MethodsGated LO
Gated Video
Gated FFT
Span RangeAny span
Gate Delay Range0 to 100.0 s
Gate Delay Settability4 digits, ≥100 ns
Gate Delay Jitter33.3 ns p-p (nominal)
Gate Length Range
(Except Method = FFT)
Gated Frequency and
Amplitude Errors
Gate SourcesExternal 1
DescriptionSpecificationsSupplemental Information
Number of Frequency Sweep/Step
Points (buckets)
Factory preset1001
Range1 to 100,001Zero and non-zero spans
100 ns to 5.0 sGate length for the FFT method is fixed at
1.83/RBW, with nominally 2% tolerance.
Nominally no additional error for gated
measurements when the Gate Delay is greater
than the MIN FAST setting
Pos or neg edge triggered
External 2
Line
RF Burst
Periodic
22 Keysight N9038B MXE Specification Guide
Keysight MXE EMI Receiver
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
8 MHz.
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.
CISPR Standard Bandwidths 200 Hz, 9 kHz, 120 kHz, 1 MHz–6 dB, subject to CISPR
mask
MIL Standard Bandwidths10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1
a. The noise marker, band power marker, channel power and ACP all compute their results using the power band-
width 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 receiver 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 receiver: 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 receiver 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.
24 Keysight N9038B MXE Specification Guide
Keysight MXE EMI Receiver
Frequency and Time
DescriptionSpecificationsSupplemental Information
RF Preselector Filters
Filter BandFilter Type6 dB Bandwidth (Nominal)
20 Hz to 150 kHzFixed lowpass310 kHz
150 kHz to 1 MHzFixed bandpass1.7 MHz
1 to 2 MHzFixed bandpass2.4 MHz
2 to 5 MHzFixed bandpass7.5 MHz
5 to 8 MHzFixed bandpass10 MHz
8 to 11 MHzFixed bandpass9.5 MHz
11 to 14 MHzFixed bandpass9.5 MHz
14 to 17 MHzFixed bandpass10 MHz
17 to 20 MHzFixed bandpass9.5 MHz
20 to 24 MHzFixed bandpass9.5 MHz
24 to 30 MHzFixed bandpass9.0 MHz
30 to 70 MHzTracking bandpass10 MHz
70 to 150 MHzTracking bandpass24 MHz
150 to 300 MHzTracking bandpass28 MHz
300 to 600 MHzTracking bandpass50 MHz
600 MHz to 1 GHzTracking bandpass60 MHz
1 to 2 GHzTracking bandpass180 MHz
2 to 3.6 GHzFixed highpass1.89 GHz (–3 dB corner frequency)
Keysight N9038B MXE Specification Guide 25
Keysight MXE EMI Receiver
Frequency and Time
DescriptionSpecificationsSupplemental Information
Microwave
Preselector Bandwidth
Mean Bandwidth at CF
a
Relevant to many options, such as B25 Wide IF
Bandwidth, in Bands 1 and higher. Nominal.
Freq option ≤ 526 Freq option >526
5 GHz58 MHz46 MHz
10 GHz57 MHz52 MHz
15 GHz59 MHz53 MHz
20 GHz64 MHz55 MHz
25 GHz74 MHz56 MHz
35 GHz62 MHz
44 GHz70 MHz
Standard Deviation9%7%
−3 dB Bandwidth−7.5% relative to −4 dB bandwidth, nominal
a. The microwave preselector can have a passband ripple up to 3 dB. To avoid ambiguous results, the –4 dB band-
width is characterized.
DescriptionSpecificationSupplemental information
Analysis Bandwidth
a
Standard10 MHz
With Option B2525 MHz
With Option B8585 MHz
With Option B1X160 MHz
a. Analysis bandwidth is the instantaneous bandwidth available about a center frequency over which the input sig-
nal 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 equivalent display smoothing to VBW filtering in a swept measurement. For example, if
VBW = 0.1 × RBW, four FFTs are averaged to generate one result.
a
26 Keysight N9038B MXE Specification Guide
Keysight MXE EMI Receiver
Amplitude Accuracy and Range
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
Measurement Range
Preamp OffDisplayed Average Noise Level to +30 dBm
Preamp OnDisplayed Average Noise Level to +30 dBm
Input Attenuation Range0 to 70 dB, in 2 dB steps
DescriptionSpecificationsSupplemental Information
Maximum Safe Input LevelRF Input 1RF Input 2Applies with or without preamp
0.1 to 1.0 dB/division in 0.1 dB steps, and
1 to 20 dB/division in 1 dB steps
Linear ScaleTen divisions
Keysight N9038B MXE Specification Guide 27
Keysight MXE EMI Receiver
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
Marker Readout
Resolution
Log (decibel) units
Trace Averaging Off, on-screen0.01 dB
Trace Averaging On or remote0.001 dB
Linear units resolution≤1% of signal level (nominal)
28 Keysight N9038B MXE Specification Guide
Keysight MXE EMI Receiver
Amplitude Accuracy and Range
Frequency Response
DescriptionSpecificationsSupplemental Information
Frequency ResponseRF Input 1: to 44 GHz
RF Input 2: to 1 GHz
(Maximum error relative to reference
condition (50 MHz)
Mechanical attenuator only
b
Non-FFT operation only
Preamp off: 10 dB atten
Preamp on: 0 dB atten)
Option 544 (mmW)
Option 503, 508 or 526 (RF/μW)
RF Preselector off Preamp off20 to 30°C5 to 50°C
3 Hz to 20 Hzx
20 Hz to 10 MHzx
20 Hz to 10 MHz
c
10 MHz
to 3.6 GHz
x±0.25 dB (nominal)
±0.60 dB±0.75 dB±0.22 dB
x±0.60 dB±0.75 dB±0.25 dB
x±0.65 dB±0.85 dB±0.22 dB
Refer to the footnote for
Band Overlaps on
page 14.
Modes above 18 GHz
a
95th Percentile (≈2σ)
10 to 50 MHz
50 MHz to 3.6 GHz
3.5 to 8.4 GHz
3.5 to 5.2 GHz
5.2 to 8.4 GHz
8.3 to 13.6 GHz
8.3 to 13.6 GHz
de
de
de
de
de
13.5 to 17.1 GHz
13.5 to 17.1 GHz
17.0 to 18.0 GHz
18.0 to 22.0 GHz
17.0 to 22 GHz
de
22.0 to 26.5 GHz
22.0 to 26.5 GHz
de
de
de
de
de
de
x±0.65 dB±0.85 dB±0.21 dB
x±0.65 dB±0.85 dB±0.15 dB
x
x
x
x
x
x
±1.5 dB±2.0 dB±0.47 dB
x
±1.6 dB±3.1 dB±0.6 dB
x
±1.5 dB±2.0 dB±0.57 dB
±1.5 dB±2.0 dB±0.46 dB
x
±1.5 dB±2.0 dB±0.54 dB
±1.5 dB±2.1 dB±0.53 dB
x
±1.5 dB±2.1 dB±0.64 dB
±1.5 dB±2.1 dB±0.57 dB
±1.7 dB±2.6 dB±0.64 dB
x
±1.7 dB±2.6 dB±0.72 dB
±1.7 dB±2.6 dB±0.61 dB
x
±1.7 dB±2.6 dB±0.71 dB
Keysight N9038B MXE Specification Guide 29
Keysight MXE EMI Receiver
Amplitude Accuracy and Range
DescriptionSpecificationsSupplemental Information
26.4 to 34.5 GHz
34.4 to 44 GHz
de
de
x
±2.5 dB±3.5 dB±0.93 dB
x
±3.2 dB±4.9 dB±1.24 dB
a. Signal frequencies above 18 GHz are prone to response errors due to modes in the Type-N connector used. With
the use of Type-N to APC 3.5 mm adapter part number 1250-1744, there are nominally six such modes. The
effect of these modes with this connector are included within these specifications.
b. For FFT based measurements, Frequency Response errors are more complicated. One case is where the input
signal is at the center frequency of the FFT measurement. In this case, the Frequency Response errors are given
by this table. The total absolute amplitude accuracy is given by the combination of the absolute amplitude accuracy at 50 MHz with the Frequency Response from this table. The other case is when the input signal is not at the
center frequency of the FFT measurement. In this case, the total frequency response error is computed by adding
the RF flatness errors of this table to the IF Frequency Response. The total absolute amplitude accuracy is given
by the combination of the absolute amplitude accuracy at 50 MHz with this total frequency response error. An
additional error source, the relative error in switching between swept and FFT-based measurements, is nominally
±0.01 dB. The effect of this relative error on absolute measurements is included with the "Absolute Amplitude
Accuracy" specifications.
c. Specifications apply with DC coupling at all frequencies. With AC coupling, specifications apply at frequencies of
50 MHz and higher. Statistical observations at 10 MHz show that most instruments meet the specifications, but a
few percent of instruments can be expected to have errors exceeding 0.5 dB at 10 MHz at the temperature
extreme. The effect at 20 to 50 MHz is negligible, but not warranted.
d. Specifications for frequencies >3.5 GHz apply for sweep rates ≤100 MHz/ms.
e. Microwave preselector centering applied.
30 Keysight N9038B MXE Specification Guide
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