On 4/21/2014 12:49 PM, David Cole wrote:
Are you in DATA mode when you use JT65. What mode for PSK?
RTFM. :) If you're using a computer to generate the signal, use DATA A for everything but RTTY. For RTTY from the computer use AFSK.
"DATA A" means that the computer generates the data modulation to be transmitted as an SSB signal. Use PSK if you want the K3 to encode the PSK, use FSK D if you want the K3 to generate RTTY modulation.
Note that while you COULD set the K3 for USB or LSB and feed to/from the computer, DATA A and AFSK A are far better, both because they disable CMP, because they disable TXEQ, replacing it witha high pass filter that reduces hum picked up by the unshielded input transformers. When using AFSK, be sure the tone frequencies and baud rate in your computer program (MMTTY, etc.) are the same as in the K3.
One of the things you will appreciate about using the K3 for digital modes is that they all center RX and TX in the passband of your filters, sothat if you want to narrow the IF to minimize QRM,you can simply dial down the RX bandwidth. In other words, the dial readout is your TX frequency (Mark in RTTY). Current wisdom is that 400 Hz is a good choice for RTTY.
73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
