Field tech 1 Exam Questions With 100% Correct Answers To Score A+

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 eachstandard 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