GTCO MM II 1201 - Users Guide - Manual (Page 45)

MM II 45
Echo
Use Echo to ensure that the interface between the tablet and host is operating correctly.
The tablet echoes (retransmits) characters back to the host that were sent from the host.
The tablet echoes the characters, one by one, as it receives them. If the interface is
working properly, the sent character matches the echoed character.
Note that character sequences are passed through, not acted upon by the tablet.
Therefore, remote commands issued while Echo is in effect are ignored by the tablet. To
abort the Echo function, issue the Reset command or repower the tablet.
Self-Test
Self-Test checks the following:
 Analog circuitry
 Stylus/cursor status
 Digital circuitry
The tablet performs self-test evaluations each time it is turned on and each time the Reset
or Self-Test command is issued. The test results are stored in the tablet. You can access
them with the Send Test Results command.
Send Test Results
Send Test Results transmits the most recent Self-Test results to the host. The results are
transmitted as one byte: