Digital Signal Demodulator - Promax RANGER mini User Manual

Settings Menu
►
Click on the
menu. The VOLTMETER function has these options:
Units: It allows you to select measurement unit for power (dBuV, dBmV,
dBm).
3.6

Digital Signal Demodulator

Description
►
Demodulator provides the most important measurements technicians need to
assess digital QAM channel quality. Constellation diagram is a simple and
graphical way to identify signal impairments which impact MER and ultimately
BER. An ideal QAM channel for example will be represented by a set
(constellation) of very sharp dots. These dots will become small dot clouds to
indicate the presence of noise or other signal degradation sources. In addition
to constellation diagram it also measures MER, preBER and postBER
simultaneously with the spectrum trace.
Operation
►
DEMODULATOR
ANALYZER and SCAN
1 Select channel or frequency and tune it.
2 Press on "DEMOD" option.
September 2018
MENU icon at the upper right corner to access the Settings
is available for
.
digital signals of
24
SPECTRUM
functions
Chapter 3: MEASUREMENT