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isdr-app · iSDR - Portable Software Defined Radio

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  • Members: 173
  • Category: Shortwave
  • Founded: Jul 28, 2010
  • Language: English
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65 Philip
g7jur Offline Send Email
Jun 28, 2011
11:29 am
Hi Charles. When running iSDR app on my iPad the spectrum base line is off the bottom of the screen. Is it possible that the next release of ISDR that could be...
66 Charles Scharlau
nz0i Offline Send Email
Jun 28, 2011
2:07 pm
Hi Philip, It is good to hear from you again. I will definitely try to address this in the next release. I plan to be adding FM mode soon. I may need some more...
67 Philip
g7jur Offline Send Email
Jun 28, 2011
6:49 pm
Hi Charles. No it's the green spectrum, the display of input. When there is little or no signal it is off the bottom of the display. This is not a problem on...
68 Charles Scharlau
nz0i Offline Send Email
Jun 29, 2011
4:27 pm
I'll look into it. Also, I've wondered if it might also be nice to have a logarithmic scale (vertically), since signal strength is actually being displayed...
69 miclevel@...
miclevel42 Offline Send Email
Jun 29, 2011
6:50 pm
Hi Charles -- Yes, please do the log scale!!! I would like to use iSDR as an IF panadaptor for pointing and tuning up my microwave rig, and sun noise and...
71 saukp Offline Send Email Jun 30, 2011
6:00 pm
Question Does setting the center frequency send a command to the attached SDR radio ( i.e. softrock ensemble II) to set its LO?? or is this for iSDR display...
72 Charles Scharlau
nz0i Offline Send Email
Jun 30, 2011
7:03 pm
Hello Paul, Thanks for your inquiry. As you suspect, there currently is NO iSDR support for direct control of an attached SDR radio/QSD device. iSDR just...
73 miclevel@...
miclevel42 Offline Send Email
Jun 30, 2011
7:10 pm
In the mean time, here's an iSDR external tuning solution that I'm considering: http://sdr-kits.net/PAOKLT/PA0KLT_Leaflet.pdf This Si570 VFO kit has a tuning...
74 Charles Scharlau
nz0i Offline Send Email
Jun 30, 2011
7:28 pm
There you go. What you see there in the PA0KLT kit is >90% of what is needed (assuming that ucontroller includes an RS-232 port) to create an Apple SDR ...
75 miclevel42 Offline Send Email Jun 30, 2011
7:32 pm
Hi Charles -- This is just to start a new thread on the log scale idea and to add a comment to my earlier posting: The reference level (as it's called in...
76 miclevel42 Offline Send Email Jun 30, 2011
7:37 pm
It's even simpler than that ... the ensemble RxTX SDR already has a USB interface to control it's VFO ... the only new hardware needed for direct iSDR control...
77 miclevel42 Offline Send Email Jun 30, 2011
7:43 pm
PS: The reason I mentioned the kit is that it works without any new iSDR interfaces, and also without lugging around a PC. The tuning controller and display...
78 Charles Scharlau
nz0i Offline Send Email
Jun 30, 2011
8:49 pm
Your point is well taken. The kit would be much smaller and handier than lugging around a laptop just for QSY. Regarding my tangent comment related to an...
79 Charles Scharlau
nz0i Offline Send Email
Jun 30, 2011
9:14 pm
I'll definitely look into the reference level. It would also probably address Philip's request for displaying weak signals currently not visible on the...
80 saukp Offline Send Email Jul 1, 2011
11:43 am
thanks all for the info.. it has spurred the desire for additional info Q1...if a powered usb hub with multiple device is attached, is the ipad able to 'see'...
81 Charles Scharlau
nz0i Offline Send Email
Jul 1, 2011
12:56 pm
Hello Paul, Thank you for the questions. Here's what I can tell you... Q1...if a powered usb hub with multiple device is attached, is the ipad able to 'see'...
82 Bruce Tanner
k2bet1 Offline Send Email
Jul 1, 2011
2:06 pm
Is this discussion pertinent to expanding the tuning range of the isdr program? It was my understanding from the description that the iSDR will accept a...
83 Charles Scharlau
nz0i Offline Send Email
Jul 1, 2011
3:00 pm
Hi Bruce, The band width over which iSDR will tune is determined by the sample rate that Apple uses in its iOS devices. (iPad with USB adapter may prove to be ...
84 Bruce Tanner
k2bet1 Offline Send Email
Jul 1, 2011
5:31 pm
Thanks for the comprehensive and comprehensible response, Charles. I look forward to the future developments, whenever. For now it is fun just to show off to...
85 Bruce Tanner
k2bet1 Offline Send Email
Jul 1, 2011
5:34 pm
I don't know if you are familiar with the 'SDR Radio Console', but it has a remote capability by which you can access a variety of radios via the Internet and...
86 Bruce Tanner
k2bet1 Offline Send Email
Jul 1, 2011
5:39 pm
Here is a new HP touch pad which may fit the bill... has stereo mic input as well as USB2... Just received the announcement via email.... ...
87 saukp Offline Send Email Jul 1, 2011
9:19 pm
hi charles yep...that is exactly what i had in mind for... i just received the ipad camera adapter which brings out the ipad usb interface i have seen reports...
88 saukp Offline Send Email Jul 6, 2011
2:14 pm
update i was able to use my iPad by connecting the camera usb adapter connected to griffin iMic connected to the softrock ensemble ii rx this setup allowed me...
89 Bruce Tanner
k2bet1 Offline Send Email
Jul 6, 2011
2:25 pm
Good to hear of your success, Paul! bet...
90 Charles Scharlau
nz0i Offline Send Email
Jul 6, 2011
2:47 pm
I'm curious where you found the specs for the microphone input. That kind of information is usually very difficult to find... and as usual I'm not finding it. ...
91 Bruce Tanner
k2bet1 Offline Send Email
Jul 6, 2011
3:14 pm
I think I was referencing this page under 'Technical Specs, I/O'. Not a lot of detail but I believe it is reporting stereo mic input... ...
92 Bruce Tanner
k2bet1 Offline Send Email
Jul 6, 2011
3:31 pm
Another Google find: http://h18004.www1.hp.com/products/quickspecs/14077_na/14077_na.pdf bet...
93 Charles Scharlau
nz0i Offline Send Email
Jul 6, 2011
4:21 pm
Would this be the text you're referring to? "(1) 3.5mm stereo headset/headphone/microphone jack" That is almost certainly describing the same 4-conductor...
94 Bruce Tanner
k2bet1 Offline Send Email
Jul 6, 2011
4:41 pm
Thanks, Charles. Yes, your quote was what I was referencing. I came to the same conclusion as you did regarding the input jack. I don't know if something can...
95 Charles Scharlau
nz0i Offline Send Email
Jul 6, 2011
5:45 pm
Bluetooth might be an option, but one with trade-offs. For me, the most serious trade-off is latency. The audio path through iSDR adds almost 100ms of signal...
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