PROMAX-25
DOCSIS Cable Modem Analyzer, Discontinued
The PROMAX-25 is a cable modem analyzer designed for the installation and
maintenance of interactive data and video services such as internet,
telephony and video on demand television on coaxial cable TV networks
using DOCSIS standards. The instrument communicates with the Cable Modem
Termination System (CMTS) located at the head end using the return path
for the upstream information and the forward path for the downstream.The PROMAX 25 provides two operating modes: registered and
non-registered. In non registered mode the PROMAX-25 displays important
cable modem system behavior parameters like the return path attenuation,
frequencies in use, MER or constellation. In registered mode, it
is possible to measure statistical data about packet transmission in the
network or IP address assignment. All measurements can be made in
a fully automatic way. Both in registered and non registered modes, it is possible to display
constellation diagram of the DOCSIS downstream channel being used. This
measurement in combination with the channel power or MER is very helpful to
check the quality of the signals received from the head end.
User interface highlights
- Maximum automation
- Fast navigation software/Keyboard
- Alphanumeric keyboard
- Access to functions via “SOFT KEYS”
- Automatic Backlight (sunlight dependent)
Non registered mode features
- Return path attenuation
- Forward path MER
- Tests according to DOCSIS 1.0 / 1.1 standards
- Downstream measurements and parameters shown:
- Frequency of the Channel
- Downstream channel power
- MER
- Constellation
- Modulation parameters (symbol rate, frequency)
- Upstream measurements and parameters shown:
- Upstream channel power / Return path attenuation
- Upstream data (Frequency, modulation parameters)
Registered mode features
- Additional upstream measurements:
- PLR (Ping Loss Ratio)
- Visualization of IP addresses
- Communication progress monitoring (Initialize, tuning, ranging)
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