Alberto, Don't we still have the problem with Win95/98 very helpfully changing the port output not-so-periodically if you have a printer driver assigned to the port. I think, from memory, you need a
G'day Rik, I believe that the FDK/Wanjina system is an excellent tool for propagation tests, where the only goal is to have an identication of a signal. The main disadvantage I see is the need of a l
Hello Steve, I believe that the FDK/Wanjina system is an excellent tool for propagation tests, where the only goal is to have an identication of a signal. The main disadvantage I see is the need of a
I am afraid the biggest threat for serial comms is coming not from Bill, but from laptop manufacturers... I have recently seen laptops of the low end of the price range which didn't have a serial po
In a message dated 12/19/01 12:43:15 PM GMT Standard Time, [email protected] writes: Hi David and the group, may I make a small and humble suggestion for all the group? When writing URLs in an email mes
Using an old Netscape I have been in the habit of not typing either the http or the www, assuming the software fills in those prefixes. Have I been missing something? Bob VE7BS Yes, Netscape tries,
the second row is a live link, while the first isn't. This makes a snap to go there... Using an old Netscape I have been in the habit of not typing either the http or the www, assuming the software f
[...] So let Windoze just drive the serial port as it seems to still be able to do (how long will that last ?) and use a PIC to turn the 8 bit words into useful functions. [...] I am afraid the bigg
Hi. If you want to save a lot of frustration, I had a local company make some boards based on Johan's design. We also added a simple BPSK modulator. www.g0mrf.freeserve.co.uk/dds.htm the second row
[....] Alberto - a question for you. How many lines can you set/reset reliably from a serial port ? This would set the maximum number of tone frequencies. 73s Steve Olney (VK2ZTO/AXSO - QF56IK : Lat
In a message dated 12/18/01 7:09:21 PM GMT Standard Time, [email protected] writes: Johan (SM6LKM) has a nice and simple DDS board which looks perfect for this job, and -much to my surprise- the AD9832
G'day All, Having had some time to think about the 7-tone scheme (I travel 3 hours a day to work), I must confess to having gone a little cold on the idea. There are a number of things, but they basi
Hi group, How about using a simple AD9832 DDS programmed directly via serial interface from the PC, and -if necessary- a PIC to convert standard RS232 frames into the DDS's format ? Johan (SM6LKM) ha
At 12:42 18/12/2001 +0100, you wrote: Hello James and the group, what you all think about the best method of generating multiple, sequential frequencies from an LF transmitter? It depends what your s
It's code is as good as anything, at least to start with ! I've started writing the software to drive the DDS based transmitter for this mode, just a straightforward case of adapting my SMT Hell code
Hello group, It is a pleasant surprise to see the positive reactions on the suggested "7 tone" coding. To keep things clear, this new coding is not meant to be a replacement for QRSS or DFCW, just as
The parallel port would enable simple hardware to allow a crude D/A converter for driving a VCXO, but isn't the LPT port difficult to drive under Windoze programming ? Direct I/O to peripherals is a
-Simple TX hardware; The 7 tone multi-FSK signal could be generated using a VCXO circuit keyed by an extremely simple interface from an 8 bit printer port; for example, an extension of G3AQC's DFCW
