I am having some problems trying to communicate with the GSV-3LS amplifier. Here an image of how I have connected:

I am using a TTL-232R cable to communicate with the amplifier and my computer as you can see at the bottom of the image.
I have downloaded GSVmulti version 1.40 but when I try to connect to the amplifier through COM port I have this Error:

and when if I try with GSVterm I have a similar issue:
Code: Alles auswählen
***GSV TERMINALPROGRAM v.5.50***
Enter COM-port number: 3
Accessing COM 3. Please wait...
Unable to communicate at COM 3 with any known device
I have downloaded Hype!Terminal and after set up the Serial Port with 38400bps 8N1 and start sending some values for example 150 I have something like this:

I am a little bit lost and I don't understand how I need to proceed to get data using the GSV-3LS can someone help me and tell how to start?
Is GSV-3LS well configured to work with UART or I need to use another kind of cable?
Thank ou very much,
Jorge