Field tech 1 Questions and Answers 100% Pass

Field tech 1 Questions and Answers 100% Pass Upstream frequency ranges between 5Mhz and 42Mhz Downstream frequency ranges Between 50MHz 860MHz Upstream frequency ranges 5MHz and 42 MHz A 6 MHz downstream channel can hold 2-4 hd channels or 8-12 standard definition channels Egress When a signal leaks out of a cable Ingress when a signal leaks into a cable Field technicians are responsible from The tap to the CPE (customer premise equipement) The most preferred BER is measured in ________ and is shown as _______ Billions, 1.0E-09 The headend Is the master facility for distributing signals over a cable television system Charter passing modem receive levels (Rx) between -10dBmv and +12dBmv Charter passing modem transmit levels (Tx) between 35dBmv and 50dBmv Charter passing MER 35dBmv HD channels around 10Mbps each standard definition channels around 3-4Mbps each QAM (qaudarature apmlitude modulation) two amplitude modulated waveforms at the same frequency that are phase shifted by 90 degrees QPSK (qaudrature phase shift keying) 16 QAM, 64 QAM, and 256 QAM are all exapmples of QAM modulation. RF loss or gain is a relative measurement and is measured in dB (decibels) RF measurements that are read from a meter are absolute measurements and are measured in dBmV (decibels per millivolts) Analog signal loss is often gradual and reduces signal slowly Digital signal loss sudden where very small margin exists for difference between a good picture and no picture (called the cliff effect) FM radio stations found between frequencies 88 MHz and 108 MHz frequency number of fully completed cycles per second Hertz one complete cycle MHz (megahertz) refers to millions of cycles per second 700 Mhz 700 million hertz CATV, cable plant, or tight system is a closed system where rf energy must be contained Signal leakage meters typically have antennas and are used to find leaks in the plant. rubber ducky, dipole, and near field antennas 1 milivolt measured across 75 Ohms 0 dBmV characteristic impedance of cable 75 Ohms Impedance mismatches refer to defects within the plant, such as kinks , cuts, bends, water damage, and poor installation (bad fitings/ terminators.) Line toner/ multimeter assist in identifying lines torque wrenches typically 20-30 inch pounds to tighten f connectors compisite video/ RCA cables not high def, used to pass baseband video and audio signals Foil i the outer portion of the braid should be removed when properly preparing and F-connector HDMI uses a multi-pin connection for digital video and milti-channel audio MER the more concentrated the dots are in a constellation display the better the signal quality fish tape come in lengths of 25 feet and longer and are used to run lines through walls and conduit. P-hooks installed at the house with P facing up J-hooks installed at the pole with J facing up span clamps installed with opening upward and pointing toward customers premises security shield tools used to connect drop cables to tap port through port shields DC loop resistance is a value that can help you determine the length of a drop Coaxial calbe two conductors runing around a central axis coaxial anatomy jacket, shielding, dielectric, and center conductor self install kit jumper fittings should be hand tightened inside the customer premises custom jumpers should be hand tightened on customer equipment and torqued to 20 in lbs passive devices (splitters) do not require power to operate. active devices (amplifiers) require power to operate. negative trap or filter blocks services by attenuating certain frequencies more than others. Flooded orange underground cable stiffer/denser jacket that better withstands compression of being buried. also contains flooding compound that helps prevent water from intruding into the cable if cable was compromised. wire braid should be folded evenly back over the dielectric when prepping a new fitting weather grommets used on outdoor splitters and tap ports to help weatherproof RG6 cable should be used when distance is 0 to 150' RG11 cable should be used when distance will be 151 to 250' distances over 250' consult with a supervisor center conductor should never extend more than 1/16th" past the end of a fitting. The main difference between a splitter and a direction coupler a 2 way splitter will have equal loss on both outputs while a DC will have unequal losses on each output leg MAC (media access control) uniquely identify each piece of equipment or CPE on the network Reconnection work orders essentially treated as new installs. make sure cable and fittings are good with no cracks or corrosion, ensure fittings are properly torqued. level scan meter function tells you what your forward or received signal strength is. signal level meters (SLMs) calibration tested and calibrated daily scale of level dB per division. increments of 2,5,10,20 dB per division. single channel mode only one channel is displayed on the meter SLMs allow you to display noise and can show the view of the return path. plain old telephone service (POTS) twisted pair telephone service that most homes are wired to use. punch down tool phone tool used to insert wires into blocks, patch panels, keystone modules and surface mount boxes. IDC connectors (jellybeans, scotch locks) used to splice phone wiring together, you must fully insert wires into each hole and then crimp the connector banjo adapters allow you to convert a modular adapter into something your test leads can use from your telephone butt set dual phones sometimes you will need to bridge the bottom and top together other times you will keep them separate. joining CAT5 wire to phone station wire RGYB the blue/blue white matches up to the red/green pair Cat5 pair one blue and blue white, blue is ring and white is tip Charter voice service work by connecting an eMTA (embedded multimedia terminal adapter) to the customer owned phones. the telephone company network interface device One of the most common demarcation points found in cable. Integrated splitter amplifier there is no loss in dBmv, your gain is the same as your loss. total offset for integrated splitter amplifier 0dBmV total integrated splitter power powered from an outlet and power inserter, can occur even if no outlet is in the direct vicinity. integrated splitter amplifiers VOIP port used to ensure that it doesn't go down in the event of a power outage. known as the -3.5 dB down port. Inter system bonding terminal if available use it over any other options. mobile home beam clamps typically used for grounding when the electrical meter is more than 30 feet away from the mobile home. Galvanized bonding stray (intersystem bonding terminal) split bolt clamp and Fargo clamps are all approved bonding devices. Galvanized grounding straps should be used to bond to galvanized conduit/pipe. acceptable use policy the rules the customer agrees to abide by. free primetime on demand anytime access service of select shows from groups of networks after they have initially aired. switched digital video (SDV) two way technology that provides a cost effective way to create more bandwidth for high definition and internet carries. PPV (pay-per-view) is typically ordered through the set top box on-screen in-band-data-path pathway used to deliver programming data from the headend to the set top box spectrum is transitioning to an all digital product, signals might be rf depending on the management area. A digital set top box allows a customer to receive digital video services when they have an analog or standard definition TV. The reverse-band-data-path pathway that delivers carries from the set top box to the head end (payperview requests, and purchase info from video on demand) set top box address-ability means the channels a box can display are remotely enabled or disabled by the cable operator. spectrum TV app allows you to program a DVR while away from home Chanel bonding used in DOCSIS 3.0 to combine multiple channels/carriers together to increase capacity. when you bond two channels together you reduce the received power by 3 dB, when you bond 4 you decrease by 6 dB. obstructing wireless signals neighboring networks, water,metals,brick, plaster, drywall, concrete, and microwave ovens can create interference in wireless signals. 3 things to consider when placing a router range of router, other rf obstructions, customer owned devices operating at 2.4 GHz. WiFi term describing WLAN products based on IEEE 802.11 standards. spectrum internet speed packages start at 100 Mbps in most areas. dual band wireless routers. use either 2.4 Ghz or 5 Ghz bands. 2.4 has a longer range than 5 Ghz, but 5 has more capacity/bandwidth. hotspots numbering in the thousands are wireless access points that allow customers to stay connected on the go. Free/unlimited. Cable Modems type of CPE used to connect a customers computer or equipment to the internet. cable at pole 40 inches away from power, 12 from phone. cable at the house 12 inches away from power, 4 inches from phone. 3 points of contact when using a ladder never use a ladder that is ________ extended never stand above the ______ step on a ladder second backyard entry you are responsible for making contact to let them know you may need to cross their property. knock on their door and if they can't be reached leave a door tag/hanger letting them know the purpose of your visit. ladder extension rope rope is not frayed , runs freely through roller and inside pulley, rope is securely fastened to the ladder. inner outer rail guides help keep both sections "(fly and base) aligned and helps keep ladder from being overextended. spring loaded ladder parts pawls, flippers, and strand hooks drop aerial cable should be no more than 6 inches per 50 feet drop transition from aerial to underground mid span attachments should avoid any cable trespass so that your customers cable line isn't crossing over a neighbors property. the messenger used to support and tie off the line. never shear off to the side and never use a knife or sharp tool to separate the messenger rg6 drip loop should be 5 inches minimum drip loops for rg11 should be 8 inches minimum vertical carry if ladder is being carried less than 10 feet shoulder carry more than 10 feet but less than 100 D-ring carry more than 100 feet cables passing over auxiliary structures (sheds garages) at least 3 feet above structure span clamps should never pinch the lashing wire j hooks require a pole attachment and may require notifying the utility company. weatherproofing entry of cable use feed through bushings and silicone sealant. wraping the house with cable consider how to hide it. hide it under decks, behind downspouts, beneath sections of siding and trim. never run coaxial cable through _______ rain gutters. drilling through brick walls always drill through mortar not brick. always discuss ________ your plans that involve drilling with the customer if bond wire goes around a corner both sides must be tagged with bond label always free grounding conductors of _____________ paint and dirt to ensure a good electrical bond bond wire should be solid copper and sized appropriately ( never smaller than size 12) prior to working on underground installations make sure you use your __________ and make sure____________ FVD to check for foreign voltage, and the pedestal is free of insects and animal hazards. also ensure your using the right sized cable for installations. permanent tags used showing the house number of the customer and are installed at the tap. the smaller end of the weather grommet should face towards the _____ tap plate. tap source of signal that a drop takes to the customer temporary drops should never be placed _____________ across roads,driveways, or sidewalks cable trespasses when the drop cables route falls outside of the customers lot boundaries. flooded cable burial at least 12 inches deep. compromised aerial messenger should be replaced when compromised bonding to common ground at the electrical entrance to protect people and equipment. underground cable is more susceptible to damage where it enters/exits the ground. references for drilling windows, doorways, and things that go outside the house. inter system bonding terminals are directly fed by a ground wire. underground rops that come from the tap will exit the ground below the house box and will typically be covered by a riser guard for the entire length of the exposed cable. trap or filter installed in a pedestal should never be threaded directly onto the port, use a jumper instead. installing phone service on a house with wired alarm ensure you're getting line seizure. RJ31X should be the first device in line from the source of the dial tone to ensure line seizure. polarity detonates the positive or negative state of an electrical circuit. for a dial tone to work the ______ must be uninterrupted tip and ring. good practice for installing cable install it along the baseboards. home run wiring configuration all lines in the house are wired back to a single location. max diameter of any hole drilled into a wooden stud for cable 3/4" electrical AC power encounter keep lines 12 inches apart and intersect at a 90 degree angle. wall fishes should be used as a last resort or specifically when a customer requests. projecting your voice avoid being monotone, relax upper body and shoulders and convey confidence. lifetime installation begins with selecting proper cable type/size, weatherproofing connections, and properly bonding to an approved ground. damage to customer equipment or property notify them and report it to your supervisor immediately. record details of damage. existing damage in customer home point out existing damage and make note on account before continuing work. Adults must be present and all times while work is being performed. cable in crawl space route it along the sill plate to a point just below the tv or modem. WiFi education educate the customer on how to access the WiFi and the limitations of the signal. NTSC analog use _______________ channels 3 or 4 when connecting to a set top box RF over coax audio output does not provide for stereo output.