Field tech 1 Exam with complete solutions

Field tech 1 Exam with complete solutions Upstream frequency ranges - Answer ️️ -between 5Mhz and 42Mhz Downstream frequency ranges - Answer ️️ -Between 50MHz 860MHz Upstream frequency ranges - Answer ️️ -5MHz and 42 MHz A 6 MHz downstream channel can hold - Answer ️️ -2-4 hd channels or 8-12 standard definition channels Egress - Answer ️️ -When a signal leaks out of a cable Ingress - Answer ️️ -when a signal leaks into a cable Field technicians are responsible from - Answer ️️ -The tap to the CPE (customer premise equipement) The most preferred BER is measured in ________ and is shown as _______ - Answer ️️ - Billions, 1.0E-09 The headend - Answer ️️ -Is the master facility for distributing signals over a cable television system Charter passing modem receive levels (Rx) - Answer ️️ -between -10dBmv and +12dBmv Charter passing modem transmit levels (Tx) - Answer ️️ -between 35dBmv and 50dBmv Charter passing MER - Answer ️️ -35dBmv HD channels - Answer ️️ -around 10Mbps each standard definition channels - Answer ️️ -around 3-4Mbps each QAM (qaudarature apmlitude modulation) - Answer ️️ -two amplitude modulated waveforms at the same frequency that are phase shifted by 90 degrees QPSK (qaudrature phase shift keying) - Answer ️️ -16 QAM, 64 QAM, and 256 QAM are all exapmples of QAM modulation. RF loss or gain - Answer ️️ -is a relative measurement and is measured in dB (decibels) RF measurements that are read from a meter are - Answer ️️ -absolute measurements and are measured in dBmV (decibels per millivolts) Analog signal loss - Answer ️️ -is often gradual and reduces signal slowly Digital signal loss - Answer ️️ -sudden where very small margin exists for difference between a good picture and no picture (called the cliff effect) FM radio stations - Answer ️️ -found between frequencies 88 MHz and 108 MHz frequency - Answer ️️ -number of fully completed cycles per second Hertz - Answer ️️ -one complete cycle MHz (megahertz) - Answer ️️ -refers to millions of cycles per second 700 Mhz - Answer ️️ -700 million hertz CATV, cable plant, or tight system - Answer ️️ -is a closed system where rf energy must be contained Signal leakage meters - Answer ️️ -typically have antennas and are used to find leaks in the plant. rubber ducky, dipole, and near field an