Promax CABLE RANGER, Руководство пользователя

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Chapter 3: MEASUREMENT 17 April 2018
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Settings Menu
Click on the MENU icon at the upper right corner to access the Settings
menu. The SCAN function has these options:
„
Edit channel plan: It allows you to edit a channel plan and DBG (refer to
"Edit Channel Plan" chapter).
„
Units: It allows you to select a mesurement unit for power (dBuV, dBmV,
dBm).
„
Reference Line: It allows you to select the reference line by numbers
(-60 dBmV to +70 dBmv). Reference line allows you to define criteria in
order to quickly accept or refuse channels levels.
„
Threshold: It allows you to define minimum and maximum levels. Only
channels between these levels will show on screen.
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Description
The TILT function is a test to measure tilt in order to equalize the line. TILT is
the difference in amplitudes between the minimum and maximum frequency
that the system can compensate.
The TILT function displays on-screen, graphically and numerically, the
difference in level between any four frequencies previously defined as pilots.
This function works for upstream and downstream band.
Typically, CATV networks transmit two pilot signals at the beginning and at the
end of the band. These two pilots and two more are the ones that can be tuned
simultaneously on the screen. By this way you can evaluate the losses slope and
therefore readjust equalizers of the amplifiers in order to compensate these
losses and ensure a flat response along the band.
3.3 Tilt (cable & FO)