Triplett CableRater- PN: 3279 User Manual

CableRaterdB Loss MeterInstruction ManualTRIPLETT84-8756/08

109.1.3 ZERO CALIBRATE KnobThe ZERO CALIBRATE knob is used to ‘calibrate’ the Transmitter to the Receiver(more on this later). It can be turned clockw

119.2.3 Input ConnectorThe Input connector is a standard female F connector (the kind commonly usedfor cable TV installations). The Transmitter’s test

129.2.4.2 Gain or Loss IndicationWhen a test signal is measured, after having properly calibrated the Transmitter,the Gain or Loss of the cable, devi

13Observe the reading on the CableRater. If any reading is obtained, other than theUnderrange indication, ingress is occurring. The higher the readin

149.4 Calibrating the TransmitterTo calibrate the Transmitter, a patch cable is used to connect theOutput jack of the Transmitter to the Input jack of

15make sure it is making good connection. The nuts on the F connectors on thepatch cable should be snuggly tightened to the connectors on the Transmit

16typically use frequencies from about 40 Mega Hertz (MHz) to about 900MHz.The CableRater performs tests at about 60MHz.There are many resource

17Coaxial cable, however, always has increasing Loss as frequency increases. Thiseffect must be considered, and compensated for if necessary. Various

18To test a splitter with the CableRater, first calibrate the Transmitter as describedin 9.4, and then connect the Transmitter and Receiver to the spl

19The CableRater is limited to testing Gain up to about 40dB. Attempting to mea-sure higher gains will produce inaccurate results.To test the Gain of

2TABLE OF CONTENTS1. Introduction …………………... 22. Safety Rules and Warnings ... 23. Product Features ...

20duce any more output level. In such a case, the CableRater will measure the Gainas being lower than expected. If saturation is suspected, reduce the

21A 0dBmV signal is the minimum amount allowed by the FCC (Federal Communi-cations Commission). This will produce a good to moderate quality TV pictur

22A ‘star’ or ‘home run’ scheme is often used. A coaxial cable (coax) from eachroom is run back to a common point, where the splitters and

23Figure 10Amplifier and 16 Way SplitterThe amplifier must have the appropriate Gain to place the signal levels in theappropriate range. A level

24(at 100 feet) must be considered if the Provider has channels reaching up to 100or more. The difference between the 60MHz and 900MHz levels is calle

259.10 Comparing CableRater Readings to Signal Level Meter ReadingsThe CableRater Receiver is not intended to accurately measure the signal levelof TV

2610: MAINTENANCEThe CableRater contains no user serviceable parts.To clean the outside of the CableRater, use a cloth dampened with a mild deter-gen

27Triplett One Year Limited WarrantyTriplett / Jewell Instruments warrants instruments and test equipment manufacturedby it to be free from defe

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32.1) The CableRater is not designed to tolerate accidental application of voltages exceeding 132VAC 60Hz. Applying higher voltages may cause da

45: SPECIFICATIONS5.1) Transmitter5.1.1) Output Level . . . . . . . . . . . . . . . . . . . . . Approx 10dBmV +/- 3dB5.1.2) Output Frequency . . . .

55.3) General Information5.3.1) Cables tested:The CableRater is intended to work with coaxial cables exhibiting a 75 Ohmcharacteristic im

66: TRANSMITTER FRONT PANELUNLOCKCBADEFigure 1A) Battery Test LEDB) Unlock ButtonC) ON / OFF Power SwitchD) Output ConnectorE) Zero Calibrate Kn

77: RECEIVER FRONT PANELCBAEDFGFigure 2A) LCD Display with BacklightB) Low Battery AnnunciatorC) Auto Power Off (APO) AnnunciatorD) Under Range A

88: PREPARING FOR USE8.1) Installing Battery in Transmitter8.1.1) Remove screw from the back of the Transmitter case.8.1.2) Carefully remove the fron

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