Troubleshooting Digital Video Service

Which of the following digital TV (DTV) trouble calls could have been avoided with customer education about the product?

The digital set-top box (STB) overheats.

Which of the following characterizes the successful troubleshooter?

Someone with an inquisitive and relentless desire to solve and fix problems.

When replacing a splitter to resolve a digital TV (DTV) service problem, what does confirming the splitter output levels before attaching the output connectors do?

Confirmation reinforces the technician's confidence that the problem will be resolved by replacing the splitter.

During which step of the six-step troubleshooting process for a digital TV (DTV) service problem are quadrature amplitude modulation (QAM) channel measurements typically taken?

Diagnosing symptoms.

After a digital TV (DTV) service problem has been analyzed and possible causes considered, what is accomplished by isolating the various network elements?

It narrows the scope of likely problem sources.

Because the spectral density of a quadrature amplitude modulation (QAM) channel is much higher than that of an analog TV channel, what is done to ensure equal power in all channels in a network with analog and digital modulation channels

Operate the analog TV channels at higher amplitude level than the QAM channels.

Which type of set-top box (STB) operates more like Data Over Cable Service Interface Specification (DOCSIS) cable modems with return channels on the same frequencies used for cable modems?

STB with DOCSIS Set-top Gateway (DSG) client software and embedded DOCSIS modems.

What does a set-top box (STB) diagnostic page of a quadrature amplitude modulation (QAM) channel showing signal-to-noise ratio (SNR) near or below 30 dB indicate?

The QAM channel quality is on the edge for reliable reception, and the source of the problem is likely in the distribution network or customer premises.

What must a technician be aware of when analyzing a digital TV (DTV) problem?

There is frequently more than one contributor to a specific DTV service problem.

When troubleshooting a digital TV (DTV) authorization issue, what can be verified using the set-top box (STB) diagnostic page?

STB reception of authorization message data.