In your case this means if there is any software handshaking (XON/XOFF) or not. That is Baud rate, number of bits, number of stop bits, parity (if any).
#Hyperterminal commands rs232 serial
(voltage level -5V looks ok) (b) The serial communication parameters as used by the instrument (or as configured on the instrument). Quote from: on November 23, 2012, 07:38:14 am To get that working, you need to know (and get it right) multiple things on multiple levels: (a) As already discussed, the hardware pinout, etc. There is no point guessing communication parameters as long as you didn't get the wiring right. To successfully communicate with the instrument you need to get all of the above right, in the above listed order. The SCPI standard specifies that, but vendors do their own thing. You further need to know things like command queuing behavior. (c.1) When sending SCPI commands, you need to know the line termination the instrument supports (CR, LF, CRLF). What you really need is a list (programming manual) from the vendor describing the implemented commands. Sometimes "*IDN?" is all you get as fare as SCPI compatibility is claimed. Unfortunately, SCPI is one of those standards which huge holes in it, and where you are lucky if a vendor has at least implemented the basics, i.e. From (a) you already know it doesn't do hardware handshake, so that needs to be turned off (no RTS/CTS handshaking, no DTR/DSR handshaking, and certainly no exotic functions like RI, CD).
To get that working, you need to know (and get it right) multiple things on multiple levels: (a) As already discussed, the hardware pinout, etc. Any help on this will be greatly appreciated! I tried sending: fetch? *idn? *tst? In the past I used a C library from Agilent to communicate to a power meter, from what I've seen there is no reason this should not work through a terminal program as well. I can see that the serial communication does have some effect since the instruments keys will get locked about 20 seconds after I'll start sending some commands but otherwise no indication. I tried switching between normal extension and null cables, changes the flow control although the spec. I tried hooking up using a serial to USB device and work through HyperTerminal but I can't seem to get anything across or get any data back. The instrument supports SCPI commands and has an RS232 port on the back. Like many other firms in China, the support they offer is non existing. It's a good quality meter that covers the AF range. Hello all, 1st post! I have an LCR meter by a Chinese manufacturer called Applent.
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