RACOM RAy3-11 User Manual Download

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3.3. 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 (in the case of RAy3-80 default is 2PSK_BW/4_S modulation), the lowest
possible 'Max TX power' parameter and ATPC off, 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 of the parameters is necessary, it can be done in the menu

Link settings > Radio

and saved

by clicking Apply button. 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 (transmission) and RX (receive). For
example, if one station has TX channel L1, then the second station RX channel must be set to the
same channel width and to the same channel L1, otherwise units do not hear each other.

3.4. 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, the selected modulation and

Netbitrate. If the ATPC function is enabled (menu Link settings > Radio) it also indicates instantaneous
/ max. allowed power and for MSE and RSS values it indicates immediate / target value size.

• Menu

Tools > Live data > Bar indicators

displays current RSS and MSE.

• Menu

Tools > Programs > Ping

allows you to send a ping test to the selected IP address.

Try out the possibility of higher modulation:

• Usage of higher modulations require to play with the parameters of ACM (Adaptive Coding and

Modulation) or ACMB (Adaptive Coding, Modulation and Bandwidth) in the menu

Link settings >

Radio

. To activate ACM/ACMB set the parameter 'ACM/ACMB maximal TX modulation' to a higher

value than default QPSK_S (respectively 2PSK_BW/4_S in case of RAy3-80). This value defines
the top of ACM/ACMB range the unit modulation can be automatically set based on the instantaneous
MSE signal quality. In menu

Status > Brief > Radio

you can monitor (Refresh or Start) changes in

used modulation.

• To set a fixed modulation set both parameters 'ACM/ACMB maximal TX modulation' and 'ACM/ACMB

minimal TX modulation' to identical values based on the results of the previous test. If you choose
modulation higher than allowed by MSE, the connection will be lost and

Status Link

will lose its

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 both units to the lower modulation.

Step-by-step Guide