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TDS2CMA Communications Module

TDS1000/2000-Series Digital Oscilloscope User Manual

141

7. If you receive only part of the printer file, try these remedies:

a. Lengthen the timeout for the external device

b. Make sure the printer is set to receive a binary file, not a

text file.

RS-232 Conventions

There are processing conventions that are specific to the RS-232

interface, such as transferring binary data, processing break signals,

reporting RS-232 I/O errors, and che cking command status.

Transferring Binary Data

To use the RS-232 port to transfer binary data to the oscilloscope, set

up the interface as follows:

H Use hardware flagging (RTS/CTS) whenever possible. Hardware

flagging guarantees no data loss.

H All eight bits of binary da ta contain meaningful information. To

make sure that all eight bits are received or transmitted, configure

the external RS-232 device to re ceive and transmit eight-bit

characters (set the RS-232 word length to ei ght bits).

Reporting RS-232 I/O Errors

Errors are reported when there is a problem with parity, framing, or

input/output buffer overruns. To report errors, the oscilloscope posts

an event code. When an error occurs, the oscilloscope discards all

input and output and wait s for a new command.

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Tektronix TDS1000- Manuale Utente Pagina 159