Tektronix 494AP service manual Performancq Requirement, DecadeTransitions, 100 DBc, At least

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Characteristic

lF Gain

Range

Accuracy

'ldB Step

Specification_ 494A1494Ap

Service,Vot.1

Tabte 2-2(Continued)

AMPLITUDE CHARAiTERISTICS

RELATED

Performancq
Requirement	emehlrl lnfarnari

87 dB of gain increase, 20 dB of gain decrease (MlN NOISE and reduled gain mode activated), in 10 dB and j dB steps

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..-- DecadeTransitions

Maximum Deviation

107 dB Range

SpuriousResponses

Residual

3rd OrderIntermodulation Products

lt_ ielst 0.2 dB/dB step to 0.5dB/gdB steps except at the decadetransitions

0.5dB or less

the * 2 d B

-100dBmor less

-29 to -30 dBm

-39 to -40 dBm

-49 to -50 dBm

-59 to -60 dBm

Maximum1 dB cumulativeerrorover 1 0d B

No input signal,with 0 dB attenua_ tion terminatingin 50 O, and funda_ mentalmixingfor Bands 1_3. (See Options30 anO gl in the Options sectionfor alternatespecifications.)

)

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10kHz-21GHz (Bands1-5)

Harmonic Distortion

-70 dBc or less from any two on_ In MinimumDistortionMode screen signals within any frequency

span.

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10kHz - 21 GHz ( B a n d ' t )

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GHz - 21 GHz (Bands 2-5)

LO Emission

-

DifferentialAmplitudeMeasurement

Range

- 60 dBc or less	Measured at -40		dBm input level in
Not discernible above the average	Minimum DistortionMode.
	-100	dBc
noise floor	At least
Less than -70dBm to 21 GHz	With 0 dB RF Attenuarion
	Delta A Mode provides differential
	measurements
		in 0.25dB increments
	(This is not related to the Delta
	MarkerMode)
	Maximum range of SZ.7SdB depen-
	dent on reference level when the
	Deita A Mode was activated
	Ditference		Steps	Error
	0.25 dB		1	0 . 1 5d B
	2 d B		I	0.4 dB
	1 0 d B		40	1 . 0d B
	20 to 57.75dB		80 to 231	2 . 0 dB

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