Wavetek 3SR Especificações Página 1

WavetekWavetekWavetekWavetekWavetekCATV Division5808 Churchman BypassIndianapolis, IN 46203-6109(800)851-1198(317)788-5960Fax: (317)782-4607E-Mail:

1-4Sweep Rate: »1 second for 600 MHz sweep, noscrambled channelsAccuracy: + 0.5 dB, normalized (dependent onstability of referenced carriers)Display S

5-85.2.1 Reverse Sweep Insertion LevelThe reverse sweep can be used to efficiently align the reverse path,while monitoring the frequency response. pro

5-9mine the desired input level. For the sweep to arrive at the activedevice input 10 dB below the level of other services in the reversespectrum, sub

5-103. Press Enter and highlight Transmitter On/Off.4. Press Up or Down diamond key so ON appears in Edit box.5. Highlight Transmitter Attenuator (0 d

5-115.2.3 Forward Telemetry Frequency (3ST)Use the UP and DOWN arrow keys or the numeric keypad to enterthe forward telemetry frequency corresponding

5-125.2.6 Select Sweep DirectionThere are two possible sweep directions on units with the ReverseSweep Option; Forward and Reverse. Use the edit box

5-135.3 INSTALLATION OF 3ST SWEEP TRANSMITTERProperly connecting the 3ST and setting up the proper levels areperhaps the two most critical steps in i

5-14To begin, select a value for DC-B. This allows the video carriers to'hit' the 3ST somewhere in the +10 dBmV range. Additional attenua-ti

5-155.4 FIELD TEST POINT CONSIDERATIONSThe same basic rules apply to the 3SR/3SRV. Too much signal levelon the input of the unit can cause inconsiste

5-16the forward telemetry frequency from the 3HRV and the forwardtelemetry frequency from the 3ST, your receiver does not have theproper version of f

5-175.6 REVERSE INGRESS FEATUREWith a model 3SR with 3SRV option, the operator may at any timerequest a view of the headend reverse path ingress spect

1-51.2.8 Spectrum ModeSpans: 3, 5, 10, 20, and 50 MHz (0.3, 0.5, 1, 2, and5 MHz/div)Sweep Rates: 1 second (5 MHz)2 seconds (10, 20 & 50 MHz)Displa

5-185.7 REVERSE SWEEP OPERATIONAll softkeys and controls work identically whether you are Forward orReverse sweeping.The icons at the bottom of the sw

5-195.7.2 Changing the Sweep DirectionThe sweep direction can be selected using the “Sweep Receiver”setup screen as described earlier. You can also c

5-20upon what has been selected in setup.5.7.5 Forward and Reverse Sweep ReferencesReverse sweep references are stored and selected the same asForward

5-215.7.7 Recognizing 3SR in Reverse Sweep OptionYou can tell if a 3SR has the Reverse Sweep option by looking at thestatus screen.NOTE: To view the s

5-225.8 CPD (Common Path Distortion) ANALYSISTest Equipment / Procedure RecommendationsDescription of CPD and CausesCPD (Common Path Distortion) is a

5-23getting close is the white powder that is a symptom of oxidation ofaluminum housings; often aluminum darkens when oxidation istaking place. These

5-24Figure 5. Common path distortion appears as beats at regularintervalsRecommended Setup for CPD AnalysisIf the test point is not band-limited to th

5-25both forward and reverse signals present. This phenomenon maypresent itself when performing a reverse noise test using the StealthModel 3ST trans

A-1APPENDIX A STATUS INDICATORS/ICONS INTRODUCTIONThere are numerous status indicators/icons displayed on the Stealth3SR. The following is a list of a

B-1APPENDIX B USER MESSAGES INTRODUCTIONThere are numerous user messages that will appear on the unit. Somemessages can be caused by improper operatio

1-61.2.10 Depth of ModulationAssumes presence of white reference on any VITS line. Non-scrambled channels only.Range: 80 to 100%Resolution: <0.5% a

B-2Message ERROR... Insufficient signal level to perform themeasurement!Condition A minimum carrier level is requiredfor C/N and HUM measurements.Resp

B-3Message ERROR... The selected reference has beencorrupted!Condition The reference cannot be usedbecause of a non-volatilememory failure.Response De

B-4Message SORRY... There is not enough memory to store anew file!Condition Memory is currently at maximumcapacity.Response Delete unwanted files to m

B-5Message SORRY... The active plan cannot be deleted!Condition An attempt to delete the activechannel plan.Response Select a different plan as the ac

B-6Message SORRY... The last channel cannot be deleted!Condition An attemp was made to delete thelast channel of a plan.Response A channel plan must c

B-7Message ERROR... C/N cannot be measured on a scrambledchannel!Condition A channel that has beenprogrammed as scrambled insetup has been selected in

1-71.2.14 Standard AccessoriesSoft Carrying CaseField replaceable Battery CartridgeBattery Charger/AC Adapter(2) "F" type input connectorsOp

1-8PP-220-440 Tunable Precision Preselector (220 to 440 MHz)PP-440-880 Tunable Precision Preselector (440 to 880 MHz)7201 Tunable Precision Preselecto

2-1SECTION 2 INSTALLATION2.1 INTRODUCTIONThe Wavetek Model 3SR Receiver is a rugged piece of precision testequipment designed for portability. It is w

2-22.5 CABLE SPECIFICATIONSThere are two cables associated with the operation of the 3SRReceiver; Stealth to Stealth (sent with 3ST Transmitter), and

2-3Serial Printer CableThe Serial Printer Cable, (1217-50-0151) can be used to print datadirectly from the 3SR Receiver.TxRxGNDDTRRxTxDTRGNDDSRCTS

2-42.6 TECHNICAL SUPPORTWe've worked hard to make the 3SR as easy-to-use as possible If youhave a problem using your unit you can contact Wavetek

3-1SECTION 3 USER INTERFACE3.1 INTRODUCTIONThis section will help you become familiar with the front-panelcontrols of the Model 3SR Receiver. Included

WARRANTYWavetek warrants that all Products manufactured or procured by Wavetek conform toWavetek’s published specifications and are free from defects

3-23.2.2 Measurement Mode Selection KeysMeasurement modes are chosen by pressing the appropriate Mea-surement Mode Selection key. There is a key for

3-3SCAN: Use the Scan mode to get a good look at absolute carrierlevels. In this mode a bar graph showing all carrier levels isdisplayed.SWEEP:

3-4Setup: The setup functions are used to set or adjust the operatingparameters of the unit.3.2.4 Arrow KeysThe four Arrow keys are used for various p

3-5123 - numeric entry mode - multiple choice modeAlpha Entry ModeMost numeric keys have alphabetic characters printed on them.These characters can be

4-1SECTION 4 OPERATION - HOW TO USE THE 3SR RECEIVER4.1 INTRODUCTIONThis section provides detailed operation of the Model 3SR Receiver.Included are de

4-25. You will then be prompted to enter the highest frequency that youwould like to scan. Type in the frequency and press the ENTERkey followed by th

4-3The parameters for each channel may be edited by cursoring to thechannel to be edited and pressing the Edit soft key.Check the listed channels to e

4-44.3.1 General SetupUse the Up and Down soft keys to scroll to additional setup items.When lists are being displayed, the up arrow soft key dims whe

4-5Operator NameAllows the user to enter the operators name. The name will appear inthe header section of the Auto Test report.Contrast LevelAdjusts t

4-6Date FormatUse the UP and DOWN arrow keys to select the desired date format.When the date format is changed, the new format will appear every-where

ContentsSECTION 1 - GENERAL INFORMATION1.1 INTRODUCTION ... 1-11.2 SPECIFICATIONS ...

4-7BeepsThe 3SR Receiver produces beeps to alert you of certain operatingconditions.The arrow keys are used to turn Beeps on or off as desired.Diagnos

4-8• Transmitter Frequency - Enter the frequency for thetransmitted signal.Warning: Subscriber interference could result, if the frequency is setto a

4-9Test Point CompensationTest Point Compensation is used to account for loses associated withcertain amplifiers. Use the UP and DOWN arrow keys or th

4-10C/N CalibrationTo increase the accuracy of the C/N measurements, a noise floorcalibration is performed. This allows the user to characterize theno

4-11Select Channel PlanPress the ENTER key to call up a list of existing channel plans. If theunit is being used for the first time, the only Channel

4-12Build Channel PlanPress the ENTER key to begin the Build Channel Plan sequence.This sequence allows the user to create a channel plan by "lea

4-13Use the Up or Down arrow soft keys to select the channel that youwish to edit.Press the Edit soft key to view and edit the following parameters:No

4-14EnabledY/N - If the channel is not enabled it will not be included in anymeasurement mode. At least one channel must be enabled.Channel TypeTV - I

4-15Sweep ChannelY/N - Designates that the channel will be used for Sweepmeasurements.Measurement Bandwidth AdjustmentsTo edit the bandwidth, cursor t

4-16Audio Offset 2Specifies the offset for the second audio carrier of a Dual typechannel.An ADD and DELETE soft key allows for adding new channels to

2.7 Worldwide Sales Offices ...2-4SECTION 3 - USER INTERFACE3.1 INTRODUCTION ...

4-17Use the Up and Down arrow soft keys to cursor to a channel. Use theC/N, HUM, and MOD soft keys to select the desired Auto Testmeasurements.Note: C

4-18The Edit Limits function works in conjunction with the performanceof an Auto Test. As the Auto Test measurements are made, thevalues are compared

4-194.3.5 Sweep ReceiverSweep ModeUse the UP and DOWN arrow keys to select the desired sweepmode.Sweep Limit VariableThe sweep limit variable is used

4-20Forward Telemetry Frequency (3ST)Use the UP and DOWN arrow keys or the numeric keypad to enterthe forward telemetry frequency corresponding to the

4-21Sweep Direction (3SRV Models in Stealth mode only)There are two possible sweep directions on units with the ReverseSweep Option; Forward and Rever

4-22Sweep File OverlaySweep file overlay allows a stored sweep response to be viewedsimultaneously with the "live" sweep response for direct

4-23Information displayed in the Level mode is as follows: Label (up to four characters)• Channel number or frequency• Channel label• Video c

4-24• Test point compensation (appears only if a nonzero value is programmed during setup) - used to eliminate the test point loss or probe loss f

4-254.5 HOW TO MEASURE TILT - BALANCING AN AMPLIFIERA cable system is designed for unity gain, and the output of each liketype of amplifier (trunk, br

4-26Information displayed in the Tilt mode is as follows :• High and low carrier frequencies• High and low carrier levels• Tilt measurement• Reference

4.10 SPECTRUM ANALYZER MODE ... 4-354.11 HOW TO PERFORM SWEEPMEASUREMENTS...

4-27Information displayed in the Scan mode is as follows:• Channel number• Channel label• Video carrier frequency and level (numerical)• Audio carrier

4-28Level AdjustmentsPress the LVL soft key to edit the scale and reference level of theScan display. To adjust the Scale, use the UP and DOWN arrow k

4-29Scan RateTwo scan rates are available in the Scan mode, normal and fast. Thescan rate is selected in the Measurement Setup menu. The Fast scanfeat

4-30An "aggregate" result summary can be accessed by pressing the LIMsoft key. This performs a limit check of all channels contained withint

4-31In the C/N mode the carrier to noise ratio of the tuned channel orfrequency is displayed. The C/N measurement bandwidth and thefrequency offset fo

4-32NOTE: If the C/N measurement value is outside the specified range,the numerical result will change from black to gray.To edit the bandwidth, press

4-33before performing an Auto test. Once the Auto Test is performed,the units cannot be changed for that particular test. Soft keys allowthe operator

4-34Note: The <1kHz setting does not include the 1Hz component, it onlyincludes 50 to 1000Hz. Information displayed in the Hummode is as follows:NO

4-354.10 SPECTRUM ANALYZER MODEThe spectrum analyzer display provides a view of the system spec-trum with variable spans from 50 MHz to 3 MHz and a dy

4-36Level AdjustmentsA LVL (level) soft key is used to adjust the vertical parameters of thegraph. These parameters include Max Hold, Ref Level and Sc

5.3 INSTALLATION OF REVERSE SWEEP TRANSMIT-TER ... 5-135.4 FIELD

4-37How To Make FCC In-Channel Response Measurements(FCC limit: < + 2 dB)The frequency response of any channel can be measured using thespectrum an

4-38Press the OK soft key once the carrier has been turned off. TheCSO/CTB measurement is now displayed.

4-39The light trace represents the carrier prior to it being turned off. Thedark trace represents the distortion products. The measurementvalue is com

4-40Using the Up and Down arrow soft keys, select the CSO Offsetnumber to change. Use the numeric entry keys or the UP and DOWNarrow keys to enter a n

4-414.11.2 OperationFrequency AdjustmentsThe FRQ (frequency) soft key is used to set the start and stopfrequency. A start and stop soft key is display

4-42graph. These parameters include Ref Level and Scale. The referencelevel is the midpoint level displayed on the graph. The Ref Levelcan be adjusted

4-43adjust limits, and specify the amp number. If the limits function isoff, the adjust limits and amp number soft keys are disabled anddimmed. The li

4-44indicator appears in the upper portion of the sweep screen.The tilt compensation feature allows the user to enter the cable lossfor a particular s

4-45selected, press the View soft key. Scan measurements can be stored,but can only be viewed/printed using the Stealthware Data Analysissoftware. Onc

4-464.12.2 How to Store/Delete Sweep ReferencesThe Sweep References soft key allows the user to select, store ordelete sweep references. After a sweep

1-1SECTION 1 GENERAL INFORMATION1.1 INTRODUCTIONThe Wavetek hand-held System Sweep Receiver performs essentialcable TV system preventive maintenance t

4-47Sweep mode, and the default reference will be used. It is recom-mended that obsolete references be deleted in order to free memoryfor additional r

4-48The stored sweep response is displayed as a gray-filled area. The liveresponse appears as a solid line superimposed or overlaid on top ofthe store

4-494.13.1 How To Create/Edit/Delete Test LocationsTest Locations allow the user to create specific test point locationparameters used in the Auto Tes

4-50Press the New soft key to create a new Test Location file.The unit will then prompt for a file name. Once a name is entered,press the OK soft key

4-51Each location in the list has an associated type and values for thedescriptive parameters. The parameters are shown in the followingtable.Paramete

4-52Characteristic Trunk Head Extender Fiber Field1 Area yes yes yes yes2 Amp Id yes yes yes3 Power Configuration yes yes yes4 Feeder Maker Config y

4-53Auto Test LocationUsing the Up and Down arrow keys, select an Auto Test location.Select NONE if location information is not desired. Press the OK

4-54Auto Test CharacteristicsUse Up and Down arrow keys to scroll through the location character-istics for the test being performed. Press the ENTER

4-55Test Point TypeUse the Up and Down arrow keys to select the Test Point type.When the desired Test Point type is selected, press the OK soft key.Th

4-56Voltage MeasurementsUse the numeric entry keys to enter the following system voltagemeasurements:• AC Voltage• DC Voltage (regulated)• DC Voltage

1-2The 3SR Receiver, in addition to performing its sweep receptionduties, conducts a battery of signal level measurements, including afull scan of the

4-57Test Point CompensationTest Point Compensation is used to account for loses associated withcertain amplifiers. Use the UP and DOWN arrow keys or t

4-58Results FileEnter a file name for the Auto Test results to be stored. If an existingfile name is used, a warning message will appear prompting the

4-59While the Auto Test is in progress, the following screen is displayed:While the Auto Test is in progress, the measurement currently beingperformed

4-60Using the numeric entry keys, enter the start and stop information forthe date and time as well as the interval amount. Press the ENTERkey after e

4-61When the unit is between testing intervals it will enter a sleep modein order to conserve battery life. All other unit functions are disableddurin

4-62A table with all testing intervals and test site information is nowdisplayed. If the Auto Test was performed immediately, then onlyone interval is

4-63Information provided on each interval includes:• Interval number• Date measurement was made• Time measurement was made• Temperature• Pass/Fail tes

4-64-------------------------------------------------------------------------WAVETEK STEALTH 24 HOUR TEST REPORTModel: 3SR Serial No:

4-65The channels with the asterisks indicate those channels that ex-ceeded the Max Delta Adjacent Channels limit. The limits that thereadings were com

4-66• < under range• > over range• E synthesizer unlockedUse the More soft key to toggle between Level measurements, C/N,Hum, and Modulation mea

1-31.2.3 Hum Measurement(carrier > 0 dBmV) Non-scrambled channels onlyRange: 0 to 10%Resolution: <0.2%Accuracy: +0.7%1.2.4 Carrier to Noise Meas

4-67-------------------------------------------------------------------------WAVETEK STEALTH AUTO TEST REPORTModel: 3SR Serial No: 12

4-684.14 STATUSTo view the Status screen, press the FCN key followed by the Statussecond function key. The Status screen provides unit information tot

4-69

5-1SECTION 5 REVERSE SWEEP OPTION5.1 INTRODUCTIONThe Stealth sweep system is designed to be non-interfering. Hencethe name Stealth for something that

5-2With the reverse sweep option, a transmitter is built into the hand-held sweep receiver. The headend sweep transmitter (3ST/3HRV) isset up to rece

5-3fier is aligned such that the response at the headend is within certainlimits from this amplifier alignment point. So, in the reverse path theampli

5-4Figure 2. Single Cable - Split Band Network Reverse SweepConfiguration With Directional Test Points.Another common architecture, which is only slig

5-5Figure 3. Transmitter Connections In Headend For Hybrid Fiber/CoaxNetworksFigure 4. Fiber Node Test Point ConnectionsDual Cable NetworkAnother poss

5-6The problem is that the two systems use the same spectrum,making it impossible to distinguish between the two with oneinstrument.The recommended me

5-7The peak held spectrum scan shown in figure below is an example ofa fully-loaded reverse band. Services carried include: telephony, data(cable mode