The needed interface is the traditional open-collector solid-state circuit that has been in use since the beginning of ham software development. WRITELOG and other ham software will also work. I use MMTTY software for everyday operation and N1MM software with MMTTY in contests.
Interface rtty Pc#
They provide an input that can be keyed from the PC if you have the right interface. It's easy with most modern transceivers to operate FSK. You know you have the purest RTTY signal on the band!
You no longer have to worry about your audio drive level. What's the difference? With FSK, you are generating a pure CW signal that is being shifted between the mark and space frequencies. In 2009, I decided it was time to go to true FSK RTTY operation. It usually works FB, but like the old Collins 32-S1 that created CW by keying an audio tone into the SSB circuit, you still have a suppressed carrier and, if you don't watch the audio drive level, you'll be splattering. When you use this method, you're transmitting a SSB signal that contains the mark and space tones. This method works by using PC software to generate audio mark and space tones that are sent to the audio input on the transceiver. Like most newcomers, I initially took the easy way and elected to use AFSK (Audio Frequency Shift Keying) to produce my RTTY signal. As much fun as those old teletype printers were, I no longer needed one to start operating RTTY! What got me going was the availability of free software (MMTTY) that allowed me to operate RTTY with just my sound card equipped PC and normal radio. I'm a relative newcomer to RTTY, having just started operating RTTY a few years ago, but I really enjoy the mode. Send an e-mail to requesting ordering information if you are interested in obtaining an interface board.
Interface rtty series#
Interface boards for the FT-1000, FT-1000MP, FT-450, or IC-720 series transceivers are $5.00 more.
Interface rtty plus#
The cost of the fully assembled and tested board with mounting hardware and installation instructions is $44.00 plus $4.00 shipping and handling in the United States. The cost of the kit version, including the PC board, all parts for the board, mounting hardware, and assembly instructions, is $29.00 plus $4.00 shipping and handling in the United States.
Interface board kits or fully assembled and tested boards are available from W3YY. The interface is fully optically isolated and RF filtered. Summary: This page describes an FSK/CW PC interface that will allow a PC to key your transmitter producing either a pure FSK or CW signal. > Projects > FSK/CW Optically Isolated PC Interface It's been some 40+ years since I wrote the program, don't have the computer, software, etc.FSK-CW PC Interface for Keying Ham Transmitters FSK/CW Optically Isolated PC Interface for Keying Ham Transmitters and Transceivers The data bit value would then be used to drill down into an "ASCII" table to pull the character then apply the character to the display.
Once the 5 bits were in, a routing that shifted the data bits right 3 times in the "A" register then XOR'd the "A" register to change the bits correctly. I remember the routine took in 1 bit at a time with a counter of 5. There were other routines to time the port data in and out. Does anyone know who made that interface and if so what the port number used to address the interface.? I seem to remember all that was needed to read data into or out of the port was to use an "IN A,". I wrote an RTTY Z80 Assembly Language program that used that interface. I also can't remember the port number to address the 1-bit interface. I had one but I can't remember who made the interface. I remember int he late 70s early 80s, a 1-bit interface was sold that plugged into the 40 pin expansion connector on the left rear of the keyboard. I'm also a licensed Extra Class Amateur Radio operator. I'm new to the group but I'm an old user of the TRS-80 Model 1.
0 kommentar(er)
