Agilent Technologies E4438C manual Repeatability and linearity

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Specifications for Frequency and Power Characteristics

Repeatability and linearity

Repeatability

Repeatability

1900 MHz CW, 5 dBm, attenuator hold On, ALC On

1900 MHz CW, 5 dBm, attenuator hold Off, ALC Off

0.1

 

 

 

 

 

0.5

0.09

 

 

 

 

Typical unit

0.45

 

 

 

 

 

 

0.08

 

 

 

 

Limits

0.4

 

 

 

 

 

0.07

 

 

 

 

 

0.35

0.06

 

 

 

 

 

0.3

0.05

 

 

 

 

 

0.25

0.04

 

 

 

 

 

0.2

(dB)Powererror

 

 

 

 

 

(dB)errorPower

0.03

 

 

 

 

 

0.15

0.02

 

 

 

 

 

0.10

0.01

 

 

 

 

 

0.05

0

 

 

 

 

 

0

0

20

40

60

80

100

120

 

 

 

 

 

 

 

 

Typical unit

 

 

 

 

 

 

 

 

 

Limits

 

 

0

1

2

3

4

5

6

7

8

9

10

Elapsed time (minutes)

Elapsed time (minutes)

Repeatability measures the ability of the instrument to return to a given power setting after a random excursion to any other frequency and power setting. It is a relative measurement that reflects the difference in dB between the maximum and minimum power readings for a given setting over a specific time interval. It should not be confused with absolute power accuracy, which is measured in dBm.1

Relative level accuracy

Initial power 7 dBm

 

0.4

 

 

 

 

 

 

 

 

 

Lower limit

 

 

 

 

 

 

 

0.3

Lower STD deviation

 

 

 

 

 

 

Mean

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Upper STD deviation

 

 

 

 

 

 

0.2

Upper limit

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

(dB)

0

 

 

 

 

 

 

 

error

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power

-0.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-0.2

 

 

 

 

 

 

 

 

-0.3

 

 

 

 

 

 

 

 

-0.4

 

 

 

 

 

 

 

 

0

-20

-40

-60

-80

-100

-120

-140

Final power (dBm)

Relative level accuracy measures the accuracy of a step change from any power level to any other power level. This is useful for large changes (i.e. 5 dB steps).1

1. Repeatability and relative level accuracy are typical for all frequency ranges.

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Contents Agilent E4438C ESG Vector Signal Generator Table of Contents E4438C ESG Vector signal generator Definitions IntroductionKey Features Key standard features Optional featuresSpecifications for Frequency and Power Characteristics FrequencySweep modes Internal reference oscillator RF reference input requirementsOutput power PowerLevel resolution Level range with Attenuator Hold activeOption ±0.15 dB ±0.25 dB Level switching speedLevel accuracy with ALC on Repeatability and linearity RepeatabilityAmplitude dBm Spectral purity SubharmonicsJitter in µUI1, 7 Jitter in seconds1, 7Characteristic SSB phase noise With Option 1E5Specifications for Analog Modulation ResolutionFM using external inputs 1 or Carrier frequency accuracy relative to CW in DCFM3Specifications for Analog Modulations Phase modulation 1Amplitude modulation 1 StandardWideband AM Pulse modulationInternal modulation source External modulation inputsInput voltage On/off ratio1Rise/fall time1 Minimum burst repetition frequency1Specifications for I/Q Characteristics Modulation bandwidthInputs Input impedance Ω or 600 Ω Full scale inputBaseband outputs AdjustmentsBaseband generator Clock Baseband filtersReconstruction filter fixed Baseband spectral puritySymbol rate Maximum deviation Symbol rateFrame trigger delay control FIR filterInternal burst shape control Specifications for Signal Personality CharacteristicsData types Cdma2000 Spurious emissionsEnhanced multitone1 Software settings Source settings 89641A settingsWlan 802.11a spectral mask typical performanceCustom modulation Real-time modeCustom digitally modulated signals real-time mode 1 Alternate time slot power level control Multiframe output data generationErrors in coded channels Payload bit error count/rate for raw BERContains residual bit errors and bit error count Downlink error reportingGSM/EDGE base station bit error rate test Bert Bit error rate BER analyzer FeaturesClock rate Supported data patternsOperating characteristics Accessories Inputs and outputs Transit caseGeneral Characteristics Panel SMB connectors External 1 inputExternal 2 input Allows communication with compatible devicesOpposite in polarity 180 degrees out of phase Relocated to rear panel SMB connectorsSymbol sync input Falling edge is used to clock the data signalLAN connector With Option UN7With Option File transfer to volatile memoryMating connector RS-232 connectorAuxiliary I/O connector Performance enhancement options Ordering Information1Frequency options E4438C ESG signal generation firmware personalities E4438C ESG Signal Studio software personalitiesRelated Literature Application literaturePage Agilent Open See the ESG Web page for the latest information