5.1 Master channels

Before doing any analysis, it is required to define some channel settings in the Channel Mapping card. The Channel Mapping card is accessible from both the Operational Data module and the FRF Data module. Only channels defined as Master Channels in the Channel Mapping card can be used for the analyses in the Analyze module.

You can create Master channels from:

• Operational dataset channels.
• FRF dataset channels.
• Virtual Point channels.

We recommend setting the channels from the FRF data as Masters, for two reasons:

• If the FRFs come from a DIRAC project, the channel types (e.g. indicator, target) can already be set ahead of time and imported directly into SOURCE;
• For several analyses, the forces and moments from the FRFs need to be included as Master Channels, so it is convenient to just set all FRF channels (and reference channels) as the Master Channels.

Creating Master channels

When importing a DIRAC project, in the data importer you can decide whether the channels should be automatically set as Masters. You can disregard this option and set master channels manually.

To manually create the master channels, you have to:

1. Open the Channel Mapping card.
2. Select the desired channels on the left side.
3. Drag and drop them to the right side.

Editing Master Channels

Setting the channel type

It is necessary that each channel is set to the right type to perform the analyses correctly. You can find the different channel types below.

To change the channel type you have to:

1. Select the channel(s) you want to change.
2. Right-click and select Set Channel Type.
3. Select the correct type.

Editing channels position and direction

If needed, you can edit the position and direction of the channels in SOURCE.

To change position and/or direction you have to:

1. Open the Channels card.
2. Click on the toggle to go to Edit mode.
3. Double click on the field you want to edit and type the correct information.
4. Press Enter to save.
5. Exit the Edit mode.