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