Tektronix O a, O o o o o o o, 494A/494APservice Manuatis divided into two volumes

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494A/494APServiceVot.1

TABLEOF CONTENTS

The 494A/494APservice Manuatis divided into two volumes.

VOLUME1

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					Page
PREFACE			........................
TABLEOFCONTENTS					i
			..........	iii
LISTOF ILLUSTRATTONS				........	x
LISTOFTABLES		...........
				.............	xiii
SERVICING
	SAFETYSUMMARY			.........	xv
Section1	GENERALINFoRMATION
	productDescription			...........	1_1
	Conformance
	to
	IndustryStandards			............	1_1
	ProductService		.................		1 1
	Instrum€nt				.... 1-z
	Construction
	Installationand				,l_2
	Preparation
	for Use			...........
	power
	Changing	InputRange
	Replacing		....,.....,.....1 2
	Fuses
	SelectedComponents			.......	1-2
	Assemblyand
	CircuitNumbering		..............		1_2
	Firmware
	Versionand
	ErrorMessageReadout				.... 1-g
	Options			..........	1-g
	Accessories		..,....................1-3
Section2 SPECFCATON
	ELECTRICAL				.....2-1
	................
	Verification
	of Tolerance
	Frequency		Values .....,.Z-1
	RelatedCharacteristics
	Amplitude				... 2-1
	RelatedCharacteristics
	InputSignatCharacteristics				.... 2_6
					2-11
	...........OutputSignalCharacteristics				2-1g
	General
'	Characteristics				2-1s
	........PowerRequirements			,.........,
	ENVRONMENTAL				2-15
				...2_16
	PHYSTCAL				.....2-.t7
Section3	INSTALLATION
	UNPACKINGAND
	tNtilAL TNSPECTTON			.......	3,-1
	coNNECTtNGPOWER				.....3_2
	PowerSourceand
	PowerRequirements				g 2
	STORAGE
	ANDREPACKAGING				,....3.2
	Storage				.....g_2
	Repackagingfor Shipment				g-3

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Section4 PERFORMANCECHECK
Introduction	..,.4-1
IncomingInspectionTest	4 1
OptionInstrumentChecks	,......4 1
Verificationof Tolerance	4_1
Values
HistoryInformation	4-1
EquipmentRequired	4-1
PRELIMINARYPREPARATTON	4-4
InitialPower-Up	.....44
CalibratePosition,
CenterFrequency,
ReferenceLevel,
andDynamicRange	4-s
PERFORMANCECHECK
pRocEDURE	.....4_6
................
1. Check't0MHzReference
OscillatorAccuracy	4_6
2. CheckCounterAccuracy	4-6

3.CheckCounterSensitivity................4-6

4.CheckCentErFrequency

Accuracy	.,......4-T
5. CheckCenterFrequency
Stability		4	-9
6. CheckResidualFM		4-9
7. CheckFrequency
Span/DivAccuracy		4	-10
8. CheckMarkerAccuracy		4-12
9. CheckSweepTime
Accuracy	........		4-19
10. CheckPulseStretcher		4	-19
11.CheckResolutionBandwidth
andShapeFactor		-...	4-14
12.CheckCalibratorOutput		4	-15
13.CheckNoiseSidebands		4	-15
14.CheckFrequencyResponse		4	-16
15.CheckDisptayDynamic			g
RangeandAccuracy		4
			-1
16.CheckPreselector
UltimateRejection		-...	4-20
17.CheckRF AttenuatorAccuracy		4-20
18.ChecklF GainAccuracy		4-25
'l
9. GheckGainVariationBetween
ResolutionBandwidths	......	4-26
20.CheckSensitivity		4-26
21.CheckResidual
SpuriousResponse			4-27
22.Cheeklntermodulation
Distortion	........		4-2A
23.CheckHarmonicDistortion		,.....4-29

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