Setup for Two Radios Connecting to One Host

After the support package is installed, set up the two radio hardware by using the guided setup method.

Note

The two ADALM-PLUTO radios must be set up with different radio IDs.

Guided Setup for Two Radios on One Host

The guided setup is recommended for Windows^®, Linux^®, and OS X operating systems.

Set up the first radio following the steps in Guided Host-Radio Hardware Setup.
Set up the second radio following the same steps.

Note

When working with multiple radios, if devices are inserted or removed, the host computer assignment of USB addresses might change. Any time an SDR device is inserted or removed from a USB port, the host computer polls all USB ports and assigns or reassigns the radio addresses associated with connected devices.

USB address assignment for multiple radios

When operating on Windows keep these considerations in mind.

When running multiple radios on the same host in separate MATLAB^® sessions, for each MATLAB session the first radio is assigned usb:0, and the ID number increments by one for subsequent radios.
Radios that are being used by one MATLAB are not seen by other MATLAB sessions. Use findPlutoRadio and check the reported serial number to identify the radios seen in a particular MATLAB session.

To ensure that all assigned radio identities remain static, do not connect or disconnect radios after SDR objects have been created. The best practice is to connect radios and create SDR objects in this order:

Clear all SDR objects.
Connect all radios.
Check to confirm that the connected radios are recognized by running this command:
```
findPlutoRadio
```
Create SDR objects.

To interface with the radio hardware, the RadioID property of the radio object must match the radio ID of the radio hardware. Update the RadioID property, if necessary.

When running multiple radios on the same host, the host assigns each radio a different radio ID. When identifying the radio by USB ID, the first radio is assigned usb:0, and the ID number increments by one for subsequent radios. For example, to assign IDs to two radios connected on the same host computer, at the MATLAB command prompt, enter:

rx = sdrrx('Pluto','RadioID','usb:0'); 
tx = sdrtx('Pluto','RadioID','usb:1');

Interacting with Two Radios

The internal radio ID of each radio object, System object™, or block interacting with the radio hardware must match the radio ID assigned to the radio hardware during setup.

In these examples, the first radio, acting as a receiver, is assigned usb:0. The second radio, acting as a transmitter, is assigned usb:1.

Tip

Run two instances of MATLAB on the host: one for the receiver and one for the transmitter.

When operating on Windows keep these considerations in mind.

When running multiple radios on the same host in separate MATLAB sessions, for each MATLAB session the first radio is assigned usb:0, and the ID number increments by one for subsequent radios.
Radios that are being used by one MATLAB are not seen by other MATLAB sessions. Use findPlutoRadio and check the reported serial number to identify the radios seen in a particular MATLAB session.

Radio Objects

Create a radio object for interacting with the receiver, and a radio object for interacting with the transmitter. In both objects, update the RadioID properties with the assigned radio ID.

RxDevice = sdrdev('Pluto');
RxDevice.RadioID = 'usb:0';

TxDevice = sdrdev('Pluto');
TxDevice.RadioID = 'usb:1';

Radio System Objects

Create a System object for interacting with the receiver, and a System object for interacting with the transmitter. When you create both System objects, set the corresponding RadioID property.

rx = sdrrx('Pluto','RadioID','usb:0'); 
tx = sdrtx('Pluto','RadioID','usb:1');

Radio Blocks

Create a block for interacting with the receiver, and a block for interacting with the transmitter. In both blocks, update the corresponding block with the matching RadioID parameter.

Set the radio ID for each connected radios.