Power Line Carrier ____________________________________________________________________
RF-MCGARDPRO
Hubbell Power Systems, Inc.
–
RFL™
Products
July 1, 2022
©2022 Hubbell Incorporated
5-35
5.5
Power Line Carrier Commissioning
5.5.1 Introduction
The HPS/RFL GARD Pro system with PLC is factory-configured as a 50-ohm power line carrier
terminal. If 50-ohm termination is being used, then the Receiver Calibration is typically the only
commissioning procedure required in the field.
This section is broken down into two parts: User interface calibrations, which require a PC
connected to the management port of the HPS/RFL GARD Pro system PLC and rear module
adjustments, which are made on the amplifier module. Below is a complete list of calibrations
and adjustment procedures:
-
User-interface calibrations:
•
Receive level calibration (user interface,
field calibration procedure)
•
Transmit power level measurement calibration (user interface, factory-set at 50-
ohm)
•
Reflected power measurement calibration (user interface, factory-set at 50-ohm)
-
Rear-module adjustments:
•
Impedance adjustment (rear module, factory-set at 50-ohm)
•
Transmit power level adjustment (rear module, factory-set at 50-ohm)
•
Transmit fail level adjustment (rear module, factory-set at 28.5dBm, 50-ohm)
•
Skewed hybrid tuning (rear module, factory-set at 50-ohm)
The following pages will describe calibration procedures initiated through the user interface:
WARNING!
Not using the correct dummy load will affect calibration.
When running the TX Monitor or Reflected Power Monitor level procedures the transmitter
MUST be terminated into a 50Ω non-inductive dummy load.