I'm new to RS232 serial command control. I have successfully setup one device and have been contolling it well via RS233 with my TSU9600 and RFX9600. The device is a Marantz DV9600 DVD player. I downloaded the document from Marantz with the commands. Selected the serial code entry and inserted the exact command listed in the doc, and selected the right RS232 port. An example command that is working is:

@PWR:1\xd, for Power Off

Works great. The next device I was going to try was my NeoPro Borrego Matrix Switch, but the instructions were over my head. I am now trying my Marantz SR8001. I figured it would be easy/clear, since I got it to easily work for my Marantz DVD. The directions aren't as clear, for a newbie like me. It is the same settings (parity, etc) as the DVD player and it is also with a straight cable. For a command it says the:

start character is "@"

command form is "xxx"+"..."

end character is 0Dh

The command that is given for Power Off is:

"PWR:0"

I have tried all kinds of combinations, but I can't get it to work. Using the pattern for the DVD player I used "@PWR:1\0Dh,"

However, I've tried many variations, e.g. without "," or without "\"

Can you give me some guidance, please?
Thanks,
Marc