First, an apology. When answering a question related to the connection of the C-M loop's RS-232 port to an Icom CT-17 converter, although the pin connections were correct, I mislabelled the transmit and receive data lines. A subsequent query was eventually resolved by reversing the TDX and RXD lines, but that caused me to think why that should be. I eventually discovered that the schematic in the Icom CT-17 User Instruction manual was incorrect, they had reversed the TXD and RXD labels. The actual connections to a Ciro-Mazzoni RS-232 port, and verified with an oscilloscope are:
Pin Name Input/Output Idle Voltage
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2 Rx Data I
3 Tx Data O -8V
4 DTR O +8V
5 GND
6 DSR I
7 RTS O +8V
8 CTS I
Again, my apologies for the previous incorrect data.
Adrian, 5B4AIY
Ignoring the spam above Adrian- are these connections common? I need to connect my controller to a microham station master if it is supported
Hi, Jim,
What these spammers hope to achieve is beyond me, and why do my posts and replies attract their attention? Anyway, yes, the RS-232 connections are correct
Hi Jim, yes the RS-232 connections are correct. However, I am not at all certain that you can connect the Ciro-Mazzoni controller's serial port to a MicroHam Station Master. Although I do not have one, I checked out their documentation, and I do no think it will work. The C-M controller polls the radio roughly once per second and expects to have complete control. C-M have made an interface that allows you to control the radio via a CAT interface/software, as well as respond to the controller's commands. This interface would probably allow you to both control the radio via the MicroHam Station Master connected to a PC running CAT software, as well as extract the frequency data from the radio's message stream to tune the antenna. It uses the C-M controller's RS-232 port as well as the Ethernet port as far as I can determine. Check out the C-M website for further details.
As for the spam, why do they target my posts? What do they hope to gain? Beats me.
Regards,
Adrian, 5B4AIY
Sorry Jim, the Serial Switch uses the existing RS-485 port that is part of the serial board interface, not the Ethernet port. My apologies.
Adrian, 5B4AIY