Start Up - RACOM RAy3-11 User Manual

Installation

4.7. Start up

Connect a power supply to the installed RAy unit. Connect the device to be used for configuration via
WiFi or Ethernet cable. Access the configuration menu using browser or Alignment tool.
4.7.1. Noise on the site
This is particularly true for installation of links working in free bands, where the user has no secured
frequency.
Analyze the level of noise in the individual channels using the spectrum analyzer under Tools > Live
data > Frequency spectrum analyzer. If necessary, adjust the choice of working channel on the basis
of the results.
While doing so, respect the rule that all units emit a signal in the Upper part of the range and receive
it in the Lower part of the range in one location, or vice versa. A transmitter must not be installed in the
part of the spectrum where other units function as receivers.
4.7.2. Directing antennas
Placing the antennas to the correct antenna alignment is very important to ensure the strongest signal
is received:
Fig. 4.29: Correct alignment diagram
• For first antenna alignment, use a narrow channel, low modulation and high power where possible.
• ATPC and ACM/ACMB functions should be switched off (prevents RF Output power fluctuations
during alignment).
• Where possible adjust both ends of link simultaneously to speed up the process.
• Alternate adjustments at both ends of link in small increments both horizontally and vertically to es-
tablish position with strongest signal (highest value of parameter RSS, received signal strength)
whilst looking for maximum main signal (see paragraph on main & side lobes).
• Link parameter RSS (received signal strength) is a key parameter for a proper antenna alignment
and later on for a proper link functionality. All the adjustment effort is to maximize this parameter on
72 RAy3 Microwave Link – © RACOM s.r.o.