Field Tech 1 (Spectrum Field Tech 1 Test) 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)