The radio page is divided in two sections:
- "Radio settings" - allows you to configure general radio parameters and features:
- General
- Radio Frontend
- AMC
- Air Frame
- "Frequency Channel Grids" - specifies the default and custom frequency domains for each bandwidth (10, 20, 40 MHz).
Radio settings
The following radio parameters can be configured under the "Radio settings" section:
Radio parameter | Description |
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Node Type | - Set the node type to Master or Slave
- In the point-to-point link, one unit must be set to Master and the other one to Slave
| Traffic Prioritization | - Enable/disable prioritization strategy:
| Link ID | - Use this parameter to avoid connecting a unit to a wrong peer if there are several co-located units using the same center frequency
- Specify different ID values for different link. Both ends of the same link must have the same ID. The value range is 0…15 in increments of 1
| Downlink Center Frequency, MHz | - Allows you to configure the frequency in MHz at which data will be transmitted
- The frequency is automatically set to "Auto" in case of DFS option in license
| Uplink Center Frequency, MHz | - Allows you to configure the frequency in MHz at which data will be received
- The frequency is automatically set to "Auto" in case of DFS option in license
| Channel Width (MHz) | - Allows you to configure the channel width (in MHz). The possible values are: 10, 20 or 40 MHz
| Short Cyclic Prefix | - Enable/disable short cyclic prefix option
- Cyclic prefix is used to mitigate inter-symbol interference due to multipath propagation environment
- Cyclic prefix size is always 1/8 for 10 MHz channel width
| Transmit Power (dBm) | - Allows you to configure the transmit power level (in dBm). The value range is 0…27 dBm in increments of 1 dBm
| Control Block Boost | - Enable/disable control block boost option
- Control Block Boost improves link availability in the most difficult propagation and interference conditions due to the radio frame with control information transfer at duplicate transmit power
| Maximal MCS | - Allows you to configure the maximum MCS that can be used:
- QPSK 1/2
- QPSK 3/4
- QAM16 1/2
- QAM16 3/4
- QAM64 4/6
- QAM64 5/6
- QAM256 6/8
- QAM256 7/8
- QAM256 30/32
- QAM1024 8/10
| AMC Strategy | - Allows you to select the AMC algorithm strategy:
- “conservative” assumes using higher CINR thresholds in order to minimize the error rate
- “aggressive” lowers the thresholds in order to use higher modulation levels and thus increase the throughput
- “normal” represents a balance between the error rate and throughput values
| TDD Synchronization | - Allows you to configure the TDD synchronization source:
- “freerun” unsynchronized frame start
- “gnss” synchronization from built-in GPS/GLONASS receiver
| Frame period (ms) | - Allows you to set the air frame period duration (in ms). The value range is 2, 4, 5 or 10 ms
- A shorter frame period gives lower latency, but also has higher overheads
- Using longer frame periods cuts down overheads, but increases the latency
| Downlink Quota (%) | - Actual downlink/uplink ratio values through specifying the downlink subframe period relative to the whole frame
- Downlink Quota available values depend from:
- Channel width
- Short Cyclic prefix
- Frame period
- Max Distance
| Max Distance (km) | - Allows you to specify the maximum link distance (in kilometers). The possible values: from 1 to 100 in increments of 1 km
- The specified value must not be lower than the actual link distance, but it is recommended keep it as close as possible to the actual distance to avoid unnecessary overheads
- The recommended strategy is to set this parameter well above the actual distance after the units have been deployed based on the measured distance value taken from “xginfo stat” output
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Setting the source of synchronization takes effect only for the Master unit. |
Make sure that the built-in GNSS receiver is set up before enabling the “gnss” option (use “gps” command to check the status - it is recommended to use values of “HDOP” parameter up to 1.5 for reliable global timing synchronization) |
Please note that the following settings must be equal for the co-located units: - Center Frequency
- Channel Width
- Max Distance
- Frame Period
- Downlink Quota
- Short Cyclic Prefix
- Link ID
All co-located units must be Master units |
Frequency Channel Grid
The licensed frequencies range per each bandwidth is displayed in the “Default Channel Grids” fields:
- For 10 MHz bandwidth: value range between 6295...6405 MHz in increments of 10 MHz
- For 20 MHz bandwidth: value range between 6300...6400 MHz in increments of 20 MHz
- For 40 MHz bandwidth: value range between 6300...6400 MHz in increments of 20 MHz
Changes to these default values can be performed in the “Customer Channel Grid” fields, where you can:
- Limit the licensed frequencies range per each bandwidth
- Change the center frequency step (for example, 6295-6405/2.5 means that the step between the center frequencies from 6295 MHz and 6405 MHz is 2.5 MHz):
The step must be >= 1 MHz and the frequencies range (determined by the license) cannot be exceeded.