Field tech 1 exam questions with answers.

Field tech 1 exam questions with answers |\ |\ |\ |\ |\ |\




Upstream frequency ranges - CORRECT ANSWERS ✔✔between
|\ |\ |\ |\ |\ |\ |\


5Mhz and 42Mhz |\ |\




Downstream frequency ranges - CORRECT ANSWERS ✔✔Between |\ |\ |\ |\ |\ |\


50MHz 860MHz
|\ |\




Upstream frequency ranges - CORRECT ANSWERS ✔✔5MHz and
|\ |\ |\ |\ |\ |\ |\ |\


42 MHz |\




A 6 MHz downstream channel can hold - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


✔✔2-4 hd channels or 8-12 standard definition channels
|\ |\ |\ |\ |\ |\ |\




Egress - CORRECT ANSWERS ✔✔When a signal leaks out of a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


cable


Ingress - CORRECT ANSWERS ✔✔when a signal leaks into a cable
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\




Field technicians are responsible from - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\


✔✔The tap to the CPE (customer premise equipement)
|\ |\ |\ |\ |\ |\ |\




The most preferred BER is measured in ________ and is shown as
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


_______ - CORRECT ANSWERS ✔✔Billions, 1.0E-09
|\ |\ |\ |\ |\

,The headend - CORRECT ANSWERS ✔✔Is the master facility for
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


distributing signals over a cable television system |\ |\ |\ |\ |\ |\




Charter passing modem receive levels (Rx) - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\


✔✔between -10dBmv and +12dBmv |\ |\ |\




Charter passing modem transmit levels (Tx) - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\


ANSWERS ✔✔between 35dBmv and 50dBmv |\ |\ |\ |\




Charter passing MER - CORRECT ANSWERS ✔✔35dBmv
|\ |\ |\ |\ |\ |\




HD channels - CORRECT ANSWERS ✔✔around 10Mbps each
|\ |\ |\ |\ |\ |\ |\




standard definition channels - CORRECT ANSWERS ✔✔around 3-
|\ |\ |\ |\ |\ |\ |\


4Mbps each |\




QAM (qaudarature apmlitude modulation) - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\


✔✔two amplitude modulated waveforms at the same frequency
|\ |\ |\ |\ |\ |\ |\ |\


that are phase shifted by 90 degrees
|\ |\ |\ |\ |\ |\




QPSK (qaudrature phase shift keying) - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\


✔✔16 QAM, 64 QAM, and 256 QAM are all exapmples of QAM
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


modulation.


RF loss or gain - CORRECT ANSWERS ✔✔is a relative
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


measurement and is measured in dB (decibels) |\ |\ |\ |\ |\ |\

, RF measurements that are read from a meter are - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


ANSWERS ✔✔absolute measurements and are measured in dBmV
|\ |\ |\ |\ |\ |\ |\


(decibels per millivolts)
|\ |\ |\




Analog signal loss - CORRECT ANSWERS ✔✔is often gradual and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


reduces signal slowly |\ |\




Digital signal loss - CORRECT ANSWERS ✔✔sudden where very
|\ |\ |\ |\ |\ |\ |\ |\ |\


small margin exists for difference between a good picture and no
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\


picture (called the cliff effect)
|\ |\ |\ |\ |\




FM radio stations - CORRECT ANSWERS ✔✔found between
|\ |\ |\ |\ |\ |\ |\ |\


frequencies 88 MHz and 108 MHz |\ |\ |\ |\ |\




frequency - CORRECT ANSWERS ✔✔number of fully completed
|\ |\ |\ |\ |\ |\ |\ |\


cycles per second |\ |\




Hertz - CORRECT ANSWERS ✔✔one complete cycle
|\ |\ |\ |\ |\ |\




MHz (megahertz) - CORRECT ANSWERS ✔✔refers to millions of
|\ |\ |\ |\ |\ |\ |\ |\ |\


cycles per second |\ |\




700 Mhz - CORRECT ANSWERS ✔✔700 million hertz
|\ |\ |\ |\ |\ |\ |\




CATV, cable plant, or tight system - CORRECT ANSWERS ✔✔is a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


closed system where rf energy must be contained
|\ |\ |\ |\ |\ |\ |\