Basic Link Configuration; Link Test - RACOM RAy3 User Manual

Step-by-step Guide

3.2. Basic link configuration

Default radio parameters depend on the specific type of link and the specific channel allocation table.
Channels are typically set for smallest possible bandwidth in the lower part of the band. Radio defaults
also define QPSK modulation and low Tx power, so both units in the pair should connect each other
right from the box (or even inside a box). If there is no spectrum conflict with other equipment in the
room (or on sites later on) and units can "hear" each other, those parameters can be used as they are
and both units can be powered on. After boot (about 30 seconds) the link should be automatically es-
tablished.
If a change in the parameters is necessary, it can be done in the menu Link settings / Radio and saved
by clicking Apply. This applies, when the work is done simultaneously on both units, while they are
connected. Otherwise each unit has to be configured individually. When configuring units individually,
pay attention to correct settings of duplex pair for channels TX and RX. For example, if one station has
TX channel L1, then the second station must also have the channel RX L1.

3.3. Link test

Verify the functionality of the radio link:
• Switch in screen Status / Brief.
• Status Bar displays Link: Ok.
If the alarm message appears at Local or Peer, it doesn't necessarily mean there is a problem. The
message indicates, that WiFi password was not set or the limit of any of the monitored parameters
has been exceeded. Essential is the "Link: Ok" message on the status bar.
• The Status screen contains values for both Local and Peer units. N/A next to Peer indicates that the
data from the Peer unit has not been transferred. If Link is Ok, simply click Refresh at the bottom of
the screen and Peer data will be updated.
• Menu Status / Detailed / Radio indicates link RSS and MSE values, in case of ACM also the selected
modulation and Netbitrate. If the ATPC function is enabled (menu Link settings / Radio) it also indic-
ates instantaneous / max. allowed power and for MSE and RSS values it indicates immediate / target
value size.
• Menu Tools / Live data / Bar indicators displays current size of RSS and MSE.
• Menu Tools / Programs / Ping allows you to send a ping test to the selected IP address.
Try out the possibility of modulation:
• Modulation ACM. In menu Link settings / Radio enable ACM. Set the TX modulation parameter to
the required maximum value. In menu Status / Brief / Radio you can monitor (Refresh or Start)
changes in used modulation based on the instantaneous MSE signal quality.
• To set a fixed modulation go to Link settings / Radio, switch off ACM and set the TX modulation to
a value from the range of QPSK through 256-QAM based on the results of the previous test. If you
choose modulation higher than allowed by MSE, the connection will be lost. Status Link will lose its
Ok value. Both units will need to be moved closer to resume the link. If this is not possible, use the
Ethernet to access each unit individually and set the basic modulation QPSK.
Verify the functionality of the entire link:
• If possible, connect user devices to both RAy units over PoE and test mutual communication.
• Another way of testing this is to connect a PC to the other unit and send a ping from one PC to the
other.
48 RAy3 Microwave Link – © RACOM s.r.o.