Wavetek 3ST Specifiche

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1-5*Typical SpecificationsRange: 60 dB maximumResolution: 1 dB1.2.9 Depth of ModulationAssumes presence of white reference on any VITS line. Non-scram

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

B-6Response Press OK to delete, STOP tocancel.Message SORRY... The last channel cannot be deleted!Condition An attemp was made to delete thelast chann

B-7Response Press OK to reset settings, STOP tocancel.Message ERROR... C/N cannot be measured on a scrambledchannel!Condition A channel that has beenp

1-6Fuse 1.25 A, 250V 5X20mm SLO-BLO (2required)1.2.13 Standard AccessoriesLine CordChannel Plan Transfer CableOperations Manual1.2.14 Options16/64 QAM

1-7(1) Specification Change - The transmitter output is being changedfrom +10 to +40 dBmV to +20 to +50 dBmV. To determine whichtransmitter output ran

2-1SECTION 2 INSTALLATION2.1 INTRODUCTIONThis section provides information on how to install the 3ST Transmit-ter.2.2 UNPACKING AND INSPECTIONThe inst

2-2The transmitter output level is variable from +20 to +50(1) dBmV in 2dB increments. The output level will be attenuated by the tap valueof the dire

2-32.5 POWER REQUIREMENTSThe Sweep System Transmitter 3ST operates on 90-265 VAC, 57-63Hz single phase input power source.2.6 CABLE SPECIFICATIONSTher

2-4Serial Printer CableThe Serial Printer Cable, (1217-50-0151) can be used to print datadirectly from the 3ST Transmitter.TxRxGNDDTRRxTxDTRGNDDSRCTS

2-52.7 TECHNICAL SUPPORTAlthough we've worked hard to make the 3ST as easy-to-use aspossible, the wide range of network architectures available t

2-6(1) Specification Change - The transmitter output is being changedfrom +10 to +40 dBmV to +20 to +50 dBmV. To determine whichtransmitter output ran

3-1SECTION 3 USER INTERFACE3.1 INTRODUCTIONThis section will help you become familiar with the front-panelcontrols of the Model 3ST Transmitter. Inclu

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: Th

3-43.2.3 Support Mode Selection KeysSupport modes are accessed using the Support Mode Selection keys.There is a key for each of the four support funct

3-53.2.5 Alpha-Numeric Entry KeysThe Alpha-Numeric keys are used to enter data as needed during theoperation of the unit. There are three indicators a

3-6Alpha Entry ModeMost numeric keys have alphabetic characters printed on them.These characters can be accessed when the alpha entry indicatorappears

4-1SECTION 4 OPERATION - HOW TO USE THE 3STTRANSMITTER4.1 INTRODUCTIONThis section provides detailed operation of the 3ST Transmitter.Included are det

4-2We recommend that the telemetry be set at 10 dB below the videocarrier level.Any response irregularities caused by the combining network will beeli

4-3Editing A Channel PlanThe next step is to edit the channel plan to characterize it for yourparticular system. Cursor down to Edit Channel Parameter

4-4The next step is to test the sweep by connecting the Model 3SRreceiver to a test point and pressing the SWEEP key (Ensure the3ST Transmitter is als

4-54.3.1 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

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

4-6Operator NameAllows the user to enter the operators name. The name will appear inthe header section of the Auto Test report.Contrast LevelAdjusts t

4-7Date 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

4-8BeepsThe 3ST Transmitter produces beeps to alert you of certain operat-ing conditions.The arrow keys are used to turn Beeps on or off as desired.Di

4-9Signal Level UnitsUse the UP and DOWN arrow keys to select the desired level units(dBmV, dBµV, dBm).Test Point CompensationTest Point Compensation

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

4-11activate the selected channel plan. Channel plans can also be deletedfrom the list using the DELETE soft key. An OK and STOP soft keyis then displ

4-12Step 2: Select a fixed channel plan to use for building the new plan.Use the UP and DOWN arrow keys to select a fixed channel plan tobuild the new

4-13Use the UP or DOWN arrow keys to select the channel that you wishto edit.Press the EDIT soft key to view and edit the following parameters:

4-14Note: If the parameter that you wish to edit does not appear on thescreen, keep pressing the arrow soft key to scroll through thelist.EnabledY/N -

4-15LabelThe label is provided to associate a channel's number with it'sprogramming. Using the alpha keys, label the channel with a desiredn

2.8 WORLDWIDE SALES OFFICES ...2-5SECTION 3 - USER INTERFACE3.1 INTRODUCTION ...

4-16ScrambledY/N - Select Yes if the channel is scrambled. When a channel isdesignated as scrambled, the sweep will only look at the video carrieras a

4-17If sweep points are entered in the following frequency ranges theywill be automatically shifted to avoid measurement inaccuracies.197.88 to 198.12

4-18Use 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

4-19Copy Remote PlanThis selection allows you to copy a channel plan from one unit toanother.Connect a cable between the serial ports of two units. En

4-204.3.5 Sweep TransmitterForward Telemetry FrequencyUse the UP and DOWN arrow keys or the numeric keypad to enterthe telemetry frequency.NOTE: For s

4-21Use the UP and DOWN arrow keys or the numeric keypad to enterthe telemetry level (20-50(1) dBmV).Forward Sweep Insertion LevelThis is the level at

4-22IMPORTANT: The frequency the reverse telemetry carrier shouldbe carefully selected such that it will not interferewith any existing carriers on th

4-23 Label (up to four characters) • Channel number or frequency• Channel label• Video carrier frequency and level (numerical)• Audio

4-24Scale AdjustmentThe UP and DOWN arrow keys can be used to adjust the referencelevel on the analog meter. This is helpful when the audio and videol

4-25Information 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 ... 4-344.11 SWEEP MODE ... 4-3

4-26To adjust the Ref Level, press the Ref Level soft key. Now the RefLevel can be changed by using the UP and DOWN arrow keys or byentering a numeric

4-27• Audio carrier frequency and level (numerical)• Histogram graph of carrier levels• Delta between audio and video levels• Selected channel plan• T

4-28Press the TILT soft key to turn tilt compensation on or off. Tiltchannels must be programmed in the Channel Plan Edit mode,before this function ca

4-29• Adjacent Channel Error• Video Level Too High/Low• ∆VA Too High/LowThe limit annunciators are updated with each scan update.An "aggregate&qu

4-304.7 HOW TO MEASURE C/NIt is a good engineering practice to use a bandpass filter on the inputof the receiver when making C/N measurements. This is

4-31Information displayed in the C/N mode is as follows:• Channel number• Channel label• Carrier frequency• Noise offset frequency• Noise frequency• B

4-324.8 HOW TO MEASURE HUMHum is undesirable modulation of the television video carrier bypower line frequencies and harmonics (e.g., 60 or 120 Hz), o

4-33Note: The <1kHz setting does not include the 1Hz component, it onlyincludes 50 to 1000Hz. Information displayed in the Hummode is as follows:NO

4-344.10 SPECTRUM ANALYZER MODEThe spectrum analyzer display provides a view of the systemspectrum with variable spans from 50 MHz to 3 MHz and a dyna

4-35Level AdjustmentsA LVL (level) soft key is used to adjust the vertical parameters of thegraph. These parameters include Max Hold, Ref Level and Sc

1-1SECTION 1 GENERAL INFORMATION1.1 INTRODUCTIONThe Wavetek Sweep System Transmitter performs essential cable TVsystem preventive maintenance tests wi

4-36How To Make FCC In-Channel Response Measurements(FCC limit: , + 2 dB)The frequency response of any channel can be measured using thespectrum analy

4-37Press the OK soft key once the carrier has been turned off. TheCSO/CTB measurement is now displayed.

4-38The light trace represents the carrier prior to it being turned off. Thedark trace represents the distortion products. The measurementvalue is com

4-394.11 SWEEP MODEThe Transmitter Sweep mode operates the same as the Scan modewith the following exceptions:• Sweep telemetry is transmitted• Sweep

4-404.12 FILEThe File menu consists of two File submenus; Store Measurement,and Measurement Files.4.12.1 How to Store/View/Delete Measurement FilesThe

4-41To view measurement files, press the Measurement Files soft key. Alisting of all currently stored measurement files is displayed. Use theUP and DO

4-424.13 AUTOThe Auto menu consists of three File submenus; Test Locations,Perform Auto Test, and Auto Test Results.4.13.1 How To Create/Edit/Delete T

4-43Press 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

4-44Each location in the list has an associated type and values for thedescriptive parameters. The parameters are shown in the followingtable.Paramete

4-45Characteristic Trunk Head Extender Fiber Field1 Area yes yes yes yes2 Amp Id yes yes yes3 Power Configuration yes yes yes4 Feeder Maker Config y

1-2The 3ST Transmitter is a full-featured signal analysis meter, with acomplete spectrum display and an analog representation of singlechannel measure

4-46Auto Test LocationUsing the Up and Down arrow keys, select an Auto Test location.Select NONE if location information is not desired. Press the OK

4-47Use Up and Down arrow keys to scroll through the location character-istics for the test being performed. Press the ENTER key after eachparameter i

4-48Voltage MeasurementsUse the numeric entry keys to enter the following system voltagemeasurements:• AC Voltage• DC Voltage (regulated)• DC Voltage

4-49Test Point CompensationTest Point Compensation is used to account for loses associated withcertain amplifiers. Use the UP and DOWN arrow keys or t

4-50Results 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

4-51While the Auto Test is in progress, the measurement currently beingperformed (i.e. Level, C/N, Hum, or Modulation) is indicated on thescreen. A ba

4-52Using 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

4-534.13.3 Viewing/Printing Auto Test FilesUpon completion of the Auto Test, the unit will enter the Auto TestResults Mode to display the Auto Test fi

4-54Information provided on each interval includes:• Interval number• Date measurement was made• Time measurement was made• Temperature• Pass/Fail tes

4-55-------------------------------------------------------------------------WAVETEK STEALTH 24 HOUR TEST REPORTModel: 3ST Serial No:

1-3Resolution: <0.2%Accuracy: +0.7%1.2.4 Carrier to Noise MeasurementNon-scrambled channels only. No preselection required for 78channels at +10 dB

4-56The channels with the asterisks indicate those channels that ex-ceeded the Max Delta Adjacent Channels limit. The limits that thereadings were com

4-57Use the More soft key to toggle between Level measurements, C/N,Hum, and Modulation measurements.When viewing the list of C/N, Hum, and Modulation

4-58-------------------------------------------------------------------------WAVETEK STEALTH AUTO TEST REPORTModel: 3ST Serial No: 12

4-594.14 STATUSTo view the Status screen, press the FCN key followed by the Statussecond function key. The Status screen provides unit information tot

5-1SECTION 5 REVERSE SWEEP OPTION5.1 INTRODUCTIONThis section provides detailed operation of the Model 3ST ReverseSweep Option. Included are detailed

5-2This is why it is best to transmit the sweep from the amplifier testpoint and measure it in the headend. This ensures that the system isproperly al

5-3Systems with directional test points are set up as shown in figure 2.In this configuration the DDC-20 is used to provide a sample of thereverse swe

5-4CombiningNetworkFILEAUTOSETUPTILTSCANLEVELC/N HUMMODSWEEPSPECTPRINTSystem Sweep Transmitter 3STFigure 3. Transmitter Connections In Headend For Hyb

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

5-6IMPORTANT: Reverse Sweep should be disabled when there areno 3SR units being used with the Reverse Sweepoption. This will optimize the update rate

1-41.2.6 TransmitterFrequency Range: 5 to 1,000 MHzLevel Range: +20 to +50 dBmV (1) ; settable in 2 dBincrementsSpectral Purity: Hars -30 dBc; Spurs -

5-75.2.5 Creating a New Reverse Sweep PlanPress the New soft key to create a new Reverse Sweep Plan. You willbe asked to enter a name for the plan th

5-8Next, enter the Start Frequency. This will be the frequency of thefirst sweep point in the plan. Use the numeric keys followed by theENTER key.

5-9Finally, you are asked to enter the Stop Frequency. There will be nosweep points generated beyond the Stop Frequency. Use thenumeric keys followe

5-10Sweep points are generated beginning at the Start Frequency andcontinuing until the Stop Frequency is reached. The frequency ofeach point is calc

5-11Note that the frequency of the selected sweep point also appears inthe edit box below the list. You can change the frequency by usingthe numeric

A-1APPENDIX A STATUS INDICATORS/ICONS INTRODUCTIONThere are numerous status indicators/icons displayed on the Stealth3ST. The following is a list of a

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

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