In a previous post alluded to as part of the migration between platforms AATest contests N1MM and I had to make changes in the manipulator, the changes were really simple, converter basically a DB-25 to DB-9 and then a small bridge to allow PTT to manipulate and make the interface as required by N1MM as you can handle CwType without changing cables. modifications, but that changes even the driver itself, are trivially simple, on occasions, I wonder whether or not value in the blog to share something so simple.
My conclusion after reflecting a bit (not much ...) on the subject was that this blog is definitely my notebook, only age and trivial modification somewhere it has to be targeted. But another reason I think is important is to convey the notion of how simple it is this type of interfaces and what type of simple modifications that may require a relatively important (or at least it looks pompous) and may be a change "platform" technically soldiers 4 cables and a few minutes time.
One story is how easy it can be built SO2R controller, a completely different story is use SO2R controller. To begin the use
CwGet as DSP / filter necessarily required to use two sound cards, the problem is that even the latest version CwGet opens the sound card MONO mode therefore not possible to capture two different signals (from two separate transceivers connected to the SO2R). In the latest version of the authors introduced the ability to make the signal plate mode with MONO or making it work in STEREO taken from the channel or I R . Actually the right channel does not seem to be going well, but that is either a mistake on my part or a bug in the implementation and not an architectural problem. As one would with the "ease" to set up a CwGet to take the right channel and another left from two separate transceivers SO2R. However, the authors, who seem to have difficulty doing things quite well, decided that no matter what the settings into the output would MONO . Ie two instances of departure CwGet simply mix together in the same channel rendering it unusable. That makes sense if it is used to decode CW CwGet and not as a filter / DSP, but for the former is totally useless in a context contester (actually completely useless in most contexts) while the latter is really good. Final result, each instance of CwGet with its own board. What creates the problem of equalization of sound.
does not take an audiophile (disto enough of it) to detect differences, even lower, between two sound sources. The ear is a marvel in this sense, or a curse in relation to this configuration. To complicate things a bit I find that I made a mistake by purchasing the plate. Basically I bought a plate mini USB (formatted dongle USB) which has only input and output MIC SPEAKER . In the motherboard plate (a generic quality AC97-haired fourth-down) signal is input by the input LINE-IN, this entry is relatively insensitive and allows some flexibility in the audio flow is injected from the transceiver. However, the board "dongle" enters the signal MIC which has a much greater sensitivity and therefore low tolerance for audio flow, without additional adapters is very critical adjustment of the volume completely closed (where the relationship signal to noise is terrible) and flow volume saturation occurs. The result is devilishly difficult to get the two plates delivered (with respect to each ear) audio streams similar.
Moreover, the ear seems to differentiate subtle differences in audio response of both plates (more acute or more severe) making the signal in one ear over the other highlight. Finally, it is no news for doctors but for me I'm an engineer, both ears are very different in their response to the flow and frequency.
Learning to chew glass, if possible use one sound card, if this is not possible to be both equal and if this is not possible for the two plates can be fed through LINE-IN . Finally, there a limit to the performance that you can get a generic plate that is typically found in every PC, to boot anything goes, but quickly found the limits to which the plates can become more economical but less yielding.
Beyond these considerations, the most formidable barrier facing an SO2R controller is not technical but physiological. The first time you hear on both ears is a wonder, almost a toy, you begin to tune into the CAT two stations simultaneously. But he quickly discovered a drawback, does not understand any of the two stations, the only way to understand one is to silence the other. So the SO2R in the first connection is useful to tune but not for work. In fact not even have to have two signals, it suffices that there noise in a signal and the other for that you can not understand it either.
In another aspect, and already a few, the literature oversimplifies contester, "put a SO2R and start making many more points" or "increase the productivity of their dead run times ...". Minga! Habituation and training required, like everything else. The talented do it without effort, the rest of us have to paddling.
be required to start a 4 to 6 hours of continuous listening to get used to receive sound in one ear and signal on the other, making training not only the ear but the brain to focus on one and ignore the other (and is only one signal and noise in the other). Then it takes between 2 and 4 hours additional listener to listen for signals in both ears and only concentrate on one (not turn, but always ignore the same signal). You just need to tune a mark at some frequency, use the beacon effect Victor (LU3HFA) operates 28190 KHz.
is, you have to put considerable time just to listen to the SO2R controller. And still have to use it effectively! Hear something that is not static in the ear that is ignored and let alone understand what both ears hear ... I do not yet certainly there so I have no idea what to wear.
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