Tilt (Cable & Fo) - Promax Cable Ranger+ User Manual

Options Menu
►
There are some options at the bottom of the screen:
: Screenshot.
DATALOGGER: It creates a datalogger with measurement data.
DBG: It accesses the DBG function that shows the channels belonging to
the Docsis Bonding Group and also demodulates the selected channel.
TILT: It accesses the TILT function (for more details see next).
Settings Menu
►
Click on the MENU
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 measurement 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 the power for the signal to appear on
screen (-60 dBmV – +70 dBmV). Only channels above this level will show
on screen.
CTB/CSO: It allows you to set parameters to measure intermodulation
distortion CTB/CSO (Composite Triple Beat / Composite Second Order)
that has a big influence on the net quality.
3.3 Tilt (cable & FO)
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
March 2020
icon at the upper right corner to access the Settings
20 Chapter 3: MEASUREMENT