Agilent Technologies E4438C manual Input voltage, On/off ratio1, Rise/fall time1, Input port

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Specifications for Analog Modulation

External burst envelope

Composite modulation

Simultaneous modulation

Input voltage

 

 

RF On

0 V

 

RF Off

–1.0 V

 

Linear control range

0 to –1 V

 

 

 

 

On/off ratio1

 

 

Condition: Vin below –1.05 V

 

 

4 GHz

> 75 dB

 

> 4 GHz

(> 64 dB)

 

 

 

Rise/fall time1

 

 

Condition: With rectangular input

 

 

(< 2 µs)

 

 

 

Minimum burst repetition frequency1

 

ALC on

(10 Hz)

 

ALC off

DC

 

 

 

 

Input port

External 1

 

 

 

 

Input impedance

50 , nominal

 

 

 

 

AM, FM, and FM each consist of two modulation paths which are summed internally for composite modulation. The modulation sources may be any two of the following: Internal, External 1, External 2.

Multiple modulation types may be simultaneously enabled. For example, W-CDMA, AM, and FM can run concurrently and all will affect the output RF. This is useful for simulating signal impairments. There are some exceptions: FM and FM cannot be combined; AM and Burst envelope cannot be combined; Wideband AM and internal I/Q cannot be combined. Two modulation types cannot be generated simultaneously by the same modulation source.

1. Parentheses denote typical performance.

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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 activeLevel accuracy with ALC on Level switching speedOption ±0.15 dB ±0.25 dB 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 generator AdjustmentsBaseband outputs Clock Baseband filtersReconstruction filter fixed Baseband spectral puritySymbol rate Maximum deviation Symbol rateFrame trigger delay control FIR filterData types Specifications for Signal Personality CharacteristicsInternal burst shape control Cdma2000 Spurious emissionsEnhanced multitone1 Software settings Source settings 89641A settingsWlan 802.11a spectral mask typical performanceCustom digitally modulated signals real-time mode 1 Real-time modeCustom modulation 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 memoryAuxiliary I/O connector RS-232 connectorMating connector Frequency options Ordering Information1Performance enhancement 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