hardware handshaking in instrument manual

[labmaster]

Dear,

I am a beginner in hardware handshaking in RS-232.

My manual described the handshaking in only one sentence as the following..

"With a 4-wire interface, 1 more character can be transmitted after CTS(Clear to Send)".

What's the meaning of the sentence (one more character)?

Practically, How can I check the CTS using VISA in LV?

Any comments will be helpful to me in my starting point.

Lee

[Dennis_Knutson]

With RTS/CTS handshaking, the sender will assert RTS (Ready to Send), the receiver will assert CTS (Clear to Send). When the sender sees that the CTS line has been asserted, it will transmit the character. To use this type of handshaking, all you have to do is with the VISA Configure Serial Port, set the flow control input to RTS/CTS.