Wavetek 3HRV Specifikace Strana 1

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1-51.2.8 Intermodulation DistortionCSO / CTB CharacteristicsVideo Signal Level (dBmV)Depth of Measurement (dB)(without preamplification / withpresel

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-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

1-6Dimensions: 3HRV: 48.3 cm (W) x13.3 cm (H) x 35.6 cm (D), 19" (W) x 5.25"(H) x 14" (D)Weight: 3HRV: 6.8 kg (15 lbs.)OperatingTempera

1-7SBC-1 Charger for one spare Stealth Battery CartridgeSBC-6 Charger for up to six spare Stealth BatteryCartridges1217-50-0151 Stealth Serial Printer

2-1SECTION 2 INSTALLATION2.1 INTRODUCTIONThis section provides information on how to install the 3HRVHeadend Reverse Sweep Receiver.2.2 UNPACKING AND

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

2-32.5 POWER REQUIREMENTSThe 3HRV operates on 90-265 VAC, 57-63 Hz single phase inputpower source.2.6 CABLE SPECIFICATIONSThere are two cables associa

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

2-52.7 TECHNICAL SUPPORTWe've worked hard to make the 3HRV as easy-to-use as possible.However, if you have a problem using your unit you can cont

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

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

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

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

3-4File: Allows the user to access measurement files.Auto: This function provides automated FCC 24 hour testingcapabilities.Setup: The setup functions

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

3-6Numeric Entry ModeIn the numeric entry mode, only the numerals 0 through 9 and thedecimal point can be entered. When negative values are allowed, t

4-1SECTION 4 OPERATION - HOW TO USE THE 3HRV HEADENDREVERSE SWEEP RECEIVER4.1 INTRODUCTIONThis section provides detailed operation of the 3HRV. Includ

4-2This 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

4-3The directional coupler on the input side should be designed for atleast the frequency range of the forward bandwidth of the networkunder test. (T

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

4-5The problem is that the two systems use the same spectrum,making it impossible to distinguish between the two with oneinstrument.The recommended me

4-6Forward Telemetry FrequencyUse the UP and DOWN arrow keys or the numeric keypad to enterthe telemetry frequency.NOTE: For successful Stealth mode o

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

4-7Reverse Sweep PlansReverse Sweep Plans are used to define the frequencies at whichsweep points will be inserted by 3SRV units with the Reverse Swee

4-8Next, enter the Start Frequency. This will be the frequency of thefirst sweep point in the plan. Use the numeric keys followed by theENTER key.

4-9The Interval is entered next. This interval determines the spacingbetween sweep points. Use the numeric keys followed by theENTER key. Then pres

4-10Sweep points are generated beginning at the Start Frequency andcontinuing until the Stop Frequency is reached. The frequency ofeach point is calc

4-11This screen shows a list of sweep points contained within the se-lected Reverse Sweep Plan. The list consists of the sweep pointnumber followed b

4-124.2.2 How to Setup for Measurement ModesThe following procedure describes the steps to prepare the 3HRV formeasurement modes.Building A Channel Pl

4-13Check the listed channels to ensure that channels that you know arenot video are not listed as video channels. If during the Build Chan-nel Plan p

4-144.3.1 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 wh

4-15Operator NameAllows the user to enter the operators name. The name will appear inthe header section of the Auto Test report.Contrast LevelAdjusts

4-16PrinterSets the printer interface to the specific type of printer used. Use theUP and DOWN arrow keys to select the desired printer. The re-quired

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

4-17DiagnosticsNote: If the Diagnostics selection does not appear on the screen, keeppressing the Down arrow soft key until it scrolls onto the list.P

4-18Warning: Subscriber interference could result, if the frequency is setto a local carrier frequency.• Sweep Telemetry On/Off - When turned on, will

4-19Frequency Tuning Step SizeThe Tuning Step Size can be adjusted using the UP and DOWNarrow keys or the numeric entry keys (0.01 to 100.00 MHz in 10

4-20Select 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

4-21Video Signal TypeThe type of video signal to be measured can be selected using theUP and DOWN arrow keys (NTSC, PAL).Channel Tuning SequenceUse th

4-224.3.4 How To Edit Channel ParametersThis setup feature allows the user to edit an existing channel plan.Press the ENTER key to initiate channel pl

4-23Press the Edit soft key to view and edit the following parameters:Note: If the parameter that you wish to edit does not appear on thescreen, keep

4-24Channel NumberThe channel number of the carrier. Enter channel number by usingthe numeric entry keys or the arrow keys.LabelThe label is provided

4-25Tilt ChannelY/N - Designates which channels are used for the Tilt mode. Up tonine channels can be designated as Tilt channels.ScrambledY/N - Selec

4-26Use 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

4.7 HOW TO MEASURE C/N ... 4-434.8 HOW TO MEASURE HUM ... 4-454

4-27Edit LimitsThe Edit Limits function works in conjunction with the performanceof an Auto Test. As the Auto Test measurements are made, thevalues ar

4-284.3.5 Reverse Sweep

4-29Forward Telemetry FrequencyUse the UP and DOWN arrow keys or the numeric keypad to enterthe telemetry frequency.NOTE: For successful Stealth mode

4-30IMPORTANT: The frequency the reverse telemetry carrier shouldbe carefully selected such that it will not interferewith any existing carriers on th

4-31Creating 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 that yo

4-32The Interval is entered next. This interval determines the spacingbetween sweep points. Use the numeric keys followed by theENTER key. Then pre

4-33Sweep points are generated beginning at the Start Frequency andcontinuing until the Stop Frequency is reached. The frequency ofeach point is calc

4-344.3.6 Editing a Reverse Sweep PlanIf desired, the selected Reverse Sweep Plan can be viewed andmodified.IMPORTANT: You should verify that none of

4-35Press the Add soft key to insert a new sweep point into the plan.The new point will be at the same frequency as the point that wasselected when th

4-36Information displayed in the Level mode is as follows: Label (up to four characters) • Channel number or frequency• Channel label

1-1SECTION 1 GENERAL INFORMATION1.1 INTRODUCTIONThe 3HRV Reverse Sweep Receiver is a headend rack mounted unitthat handles the reverse sweep job for u

4-37Scale 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

4-38Information displayed in the Tilt mode is as follows:• High and low carrier frequencies• High and low carrier levels• Tilt measurement• Reference

4-39To 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

4-40• Histogram graph of carrier levels• Delta between audio and video levels• Selected channel plan• Test point compensation (appears only if a nonze

4-41Press 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

4-42When an out of tolerance condition exists a set of annunciators willappear below the scan graph. The annunciators indicate the followingout of tol

4-434.7 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

4-44Information displayed in the C/N mode is as follows:• Channel number• Channel label• Carrier frequency• Noise offset frequency• Noise frequency• B

4-454.8 HOW TO MEASURE HUMHum is undesirable modulation of the television video carrier bypower line frequencies and harmonics (e.g., 60 or 120 Hz), o

4-46NOTE: HUM measurements taken while the desktop charger is inuse will affect the HUM reading. For the most accuratereading disconnect the charger p

1-2The 3HRV is a full-featured signal analysis meter, with a completespectrum display and an analog representation of single channelmeasurement data.

4-474.10 SPECTRUM ANALYZER MODEThe spectrum analyzer display provides a view of the systemspectrum with variable spans from 50 MHz to 3 MHz and a dyna

4-48Level AdjustmentsA LVL (level) soft key is used to adjust the vertical parameters of thegraph. These parameters include Max Hold, Ref Level and Sc

4-49How To Make FCC In-Channel Response Measurements(FCC limit: , + 2 dB)The frequency response of any channel can be measured using thespectrum analy

4-50Press the OK soft key once the carrier has been turned off. TheCSO/CTB measurement is now displayed.

4-51The light trace represents the carrier prior to it being turned off. Thedark trace represents the distortion products. The measurementvalue is com

4-524.11 SWEEP MODEThe Sweep mode displays and provides feedback to the field as tothe current condition of noise and ingress in the headend. Even if

4-53Frequency AdjustmentsThe FRQ (frequency) soft key is used to set the start and stopfrequency (for the display only). A start and stop soft key is

4-54The scale parameter (1,2,5, & 10 dB/Div) can only be adjusted withthe cursor keys. For example, if the reference level was set at 2 dBand the

4-55To view measurement files, press the Measurement Files soft key. Alisting of all currently stored measurement files is displayed. Use theUP and DO

4-564.13.1 How To Create/Edit/Delete Test LocationsTest Locations allow the user to create specific test point locationparameters used in the Auto Tes

1-3Digital Average PowerOption Accuracy: +1.8 dB at 25°C1.2.3 Hum Measurement(carrier > 0 dBmV) Non-scrambled channels onlyRange: 0 to 10%Resolutio

4-57Press 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

4-58Each location in the list has an associated type and values for thedescriptive parameters. The parameters are shown in the followingtable.Paramete

4-59Characteristic Trunk Head Extender Fiber Field1 Area yes yes yes yes2 Amp Id yes yes yes3 Power Configuration yes yes yes4 Feeder Maker Config y

4-60Auto Test LocationUsing the Up and Down arrow keys, select an Auto Test location.Select NONE if location information is not desired. Press the OK

4-61Use Up and Down arrow soft keys to scroll through the locationcharacteristics for the test being performed. Press the ENTER keyafter each paramete

4-62Voltage MeasurementsUse the numeric entry keys to enter the following system voltagemeasurements:• AC Voltage• DC Voltage (regulated)• DC Voltage

4-63Test Point CompensationTest Point Compensation is used to account for loses associated withcertain amplifiers. Use the UP and DOWN arrow keys or t

4-64Results 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

4-65While the Auto Test is in progress, the measurement currently beingperformed (i.e. Level, C/N, Hum, or Modulation) is indicated on thescreen. A ba

4-66Using 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

1-41.2.5 TelemetryFrequency: User defined, 5 to 1,000 MHzModulation: FSK, 100 kHz deviationSpectrum Required: »1 MHz recommended1.2.6 TransmitterFrequ

4-674.13.3 Viewing/Printing Auto Test FilesUpon completion of the Auto Test, the unit will enter the Auto TestResults Mode to display the Auto Test fi

4-68Information provided on each interval includes:• Interval number• Date measurement was made• Time measurement was made• Temperature• Pass/Fail tes

4-69-------------------------------------------------------------------------WAVETEK STEALTH 24 HOUR TEST REPORTModel: 3HRV Serial No:

4-70The channels with the asterisks indicate those channels that ex-ceeded the Max Delta Adjacent Channels limit. The limits that thereadings were com

4-71When viewing the list of C/N, Hum, and Modulation measurements,the following symbols will replace the measurement value if an erroroccurred:• UNDE

4-72-------------------------------------------------------------------------WAVETEK STEALTH AUTO TEST REPORTModel: 3HRV Serial No: 12

4-734.14 STATUSTo view the Status screen, press the FCN key followed by the Statussecond function key. The Status screen provides unit information tot

A-1APPENDIX A STATUS INDICATORS/ICONS INTRODUCTIONThere are numerous status indicators/icons displayed on the Stealth3HRV. The following is a list of

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