UM1518 Datasheet, PDF (24/37 Pages) STMicroelectronics – ST7580 power line modem demonstration kit

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Figure 22. Ping session: Master and Slave tabs
UM1518
5.6.1
AM16521v1
The Ping session can be logged in a .txt file, selecting the "Save Logs" switch located on the
right-top edge of both Master and Slave tab. The resulting file records the powerline activity
(both transmitted and received frames) of the node over the Ping session.
Ping protocol
The Ping session consists of an exchange of DL frames between the Master node and one
or more Slave nodes.
Master node
The Master node sends a powerline frame sequence with selectable electrical features:
● Carrier frequency value (it is overwritten in the MIB object 01h - PHY configuration as
RX operating frequency);
● Modulation type as in ordinary DL_DataRequest command;
● TX Gain parameter (it is overwritten in the MIB object 01h - PHY configuration).
These electrical characteristics are equal to each transmitted frame in all frames sent by the
Master over Ping session.
The GUI tool adds specific subfields to the Payload field of the exchanged DL frames, as
shown in Figure 23, where the blue parts need to be specified by the user, while the green
one is automatically built by the GUI tool. The red blocks refer to the fields automatically
handled by the ST7580.
The Payload length selected by the user is limited to 244 bytes.
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Doc ID 022791 Rev 2