[soft_radio] Re: Question about QS1R
This question from this poster has been answered multiple times now on the QS1R group. It is reproduced below. Phil N8VB This is repeated from the April 7, 2010 message on this group: If the IF output of the R9000 is 10.7 MHz and you have SDRMAX's Displayed Frequency Control offset set to 62.5 MHz then 10.7 + 62.5 = 73.2 MHz. Set the Displayed Frequency Control offset back to 0 MHz and your display will be 10.7 MHz which is the IF you are feeding into the QS1R. The Displayed Frequency Control offset does not make the QS1R receive on the selected offset - it only corrects the indicated frequency in SDRMAX when using the QS1R in under-sampling mode or using it as an IF receiver. You will receive some bandwidth +/- of the 10.7 MHz IF - it depends on bandwidth available at the R9000's IF output. You can use the Custom setting in SDRMAX, by entering a custom offset frequency, and this will offset the displayed frequency - for example, if you set the offset to -10.7 MHz, then the SDRMAX display will show 0 Hz when tuned to 10.7 MHz (your IF). The spectrum display then indicates +/- Hz deviation from your center frequency (10.7) with 0 Hz being in the middle of the display. So if you are seeing a signal at +50 kHz, then what the display is telling you is that the signal is 50 kHz higher (or lower) than the R9000's tuned frequency. If the R9000 is tuned to 900 MHz, then a signal at +50 kHz on the spectrum display is at 900.050 MHz (or at 899.950 MHz, depending on whether the R9000 IF's implementation). Phil -- and -- Yes, you can make the SDRMAX display read the same frequency that your receiver is tuned to. You will need to compute and set a custom offset in the Displayed Frequency Control settings. SDRMAX then will display the frequency that your R9000 is tuned to - unless you change the tuned frequency. If you do change it, you will have to enter a new offset. This absolute method works well if you keep your R9000 on the same frequency. If you move it around a lot, the bandspread method described is probably a better choice. The only way that SDRMAX could correct the offset on the fly as you tuned your R9000 is if SDRMAX was in communication with the R9000 reading its tuned frequency. This may be possible in the future when communications support is added to SDRMAX. (I wonder if OmniRig supports the R9000? I'll have to check that out). and If you are tuned at 142000 Hz on the R9000, set the custom offset in SDRMAX to 142000 - 1070 = 140930 Hz. --- In q...@yahoogroups.com, Rachel dr.rtortol...@... wrote: Thanks Chris but I don't find WinRzdHD tuning thay way Yes I can have two two switchable frewuencies on the LO (A,B) but then the tuning is not free and mimics the LO frquency unable to tune as a bandspresd. So what;s the matter with that? SDR-Max 2 runs. the server finds the gui and the two boot up. Unfortunately I don't see a frequency that makes sense. on just to the left of the S-mete is a number such as 68.000.00 and on the far left below the RUN button there is s DLE button which opens to a digital input VFO but the relation of this number to the other is not clesr. Phil gave me a formula to calculate center frequency but who wants to be doing that all the time. Is there an easier way to understand this? Help Rachel --- In q...@yahoogroups.com, Chris kc2rgw@ wrote: Re: WinradHD LO A/B are basically two 'memories' so you can tune one to one band or one frequency and the other to another and toggle back and forth. it's like VFO A/B on an HF rig Tune and LO in Winrad...think of it like this LO is the center of what you are looking at, Tune is the offset within the window you are looking at. You can tune in stations centered on the LO or by using Tune to slide back and forth off that center frequency point. You are doing something wrong with SDRMax if it isn't tuning directly alongdo you have the QS1R Server running? I'm confused by what you said. On Tue, May 11, 2010 at 7:12 PM, Rachel dr.rtortolini@ wrote: Hello guys, I just bought a QS1R an have it running on WinRadHD and SDR-Max 3. Trouble is on either I have trouble with the Frequency. WinRadHD has a tuner and LOA and LOB what are thes for and how do you scroll to other frequencies? SDR-Max is beyond me. Why do you set the center freq on the DLE (?) when the frequency shown is meaning less. Why can't I dial up a center frequency like on the SDR-I/Q? Thank you for your help. Rachel -- 73 de Chris KC2RGW --- Ëdn Çpıs ÊÉ¥Æıɹ ɹoÊıuoɯ ɹnoÊ uɹnÊ ÇsÉÇ×d 'sÄ±É¥Ê ÆuıpÉÇɹ ÇÉ¹É noÊ Éı
[soft_radio] Re: Question about QS1R
Hi Leif, --- In soft_radio@yahoogroups.com, Leif Asbrink l...@... wrote: The official site: http://www.srl-llc.com has a link to QS1R SVN which leads to |http://code.google.com/p/qssdrcode On that page I read: You do not have to have a Google account for ready-only access, just use the following address: http://qssdrcode.googlecode.com/svn/ This link is broken. The requested URL /svn/ was not found on this server. It must be an issue with the browser you are using or something, since the above link is valid and takes you to the svn code. I am not sure what part of the code you are looking at, but the qs1r shared library is pure C, not C++. Here is an alternative: Could you point me to your API documentation that describes how to interface a hardware device to Linrad? If I have some kind of instructions on how to go about adding support for QS1R in Linrad, I could do it. I was able to easily write a DLL to interface to Winrad for the QS1R because of Alberto's ExtIO documentation. His ExtIO interface is a brilliant way of allowing just about any hardware to work with Winrad. Since you are having trouble with SVN, I've placed the code for the qs1r library here: http://www.philcovington.com/qs1r_latest/Misc/qsiolib.h http://www.philcovington.com/qs1r_latest/Misc/qsiolib.c If you look at it you will see it contains no C++. The rest of the code and information is in SVN at http://qssdrcode.googlecode.com where anyone can access it. I cannot copy it all to some other location like I did above with the qsiolib files because of disk space. Any which way, if you can point me to your documentation on how to interface with Linrad, I'll see what I can do. Phil N8VB
[soft_radio] Re: Question about QS1R
Hi Rachel, First try this: When you connect your QS1R to an antenna ( not the R9000 ) and tune to a frequency with SDRMAXII of say 10 MHz, do you receive WWV? Or if not 10 MHz, to a AM radio station in the AM broadcast band? If you are able to receive radio stations then there is nothing wrong with the unit. If you are receiving radio stations then connect your R9000 IF output to the QS1R. Tune the QS1R to 10.7 MHz and forget about setting the offsets and corrections for this test. Make sure the Displayed Frequency Control box is set to 0 MHz (the 0 MHz checkbox is selected) and F-INVERT and SB-INVERT are not selected. Please set it up as shown in this screenshot: http://www.philcovington.com/qs1r_latest/Misc/R9000_QS1R.png Tune the R9000 to some frequency like 10 MHz. See if you are then receiving signals in the panadapter. Screenshots of what you are seeing on the panadapter would be very, very helpful. I am not pissed off. Unfortunately, if you don't try these steps and tell us what the results are at each step, it is very hard to diagnose the problem. We need the feedback from you on these steps to figure out what is going on. We should also probably continue this on the QS1R group since this group is not for QS1R support (sorry Alberto!). Phil N8VB --- In soft_radio@yahoogroups.com, Rachel dr.rtortol...@... wrote: Hi Phil, If the IF output of the R9000 is 10.7 MHz and you have SDRMAX's Displayed Frequency Control offset set to 62.5 MHz then 10.7 + 62.5 = 73.2 MHz. Set the Displayed Frequency Control offset back to 0 MHz and your display will be 10.7 MHz which is the IF you are feeding into the QS1R. I'm sorry I'm so frustrating but this paragraph alone does not work on my unit. I assume I am getting 10.7 MHz out of the IF and I am tuned to 1420. I open the DFE and put in 62.5 and hit enter but 73.5 does not show. I get 374,999,540,0. Then I set the offset back to 0 and I get 312,500,000,0 and the panorama shows 314 to 330 approximately. My Rx=0 and res 1 Hz. This not working. Do you suspect a defective unit? I don't blame you if you are p**sed off. Maybe I should go back to SDR-IQ and sell this QS1R? --- In soft_radio@yahoogroups.com, Phil N8VB p.covington@ wrote: This question from this poster has been answered multiple times now on the QS1R group. It is reproduced below. Phil N8VB This is repeated from the April 7, 2010 message on this group: If the IF output of the R9000 is 10.7 MHz and you have SDRMAX's Displayed Frequency Control offset set to 62.5 MHz then 10.7 + 62.5 = 73.2 MHz. Set the Displayed Frequency Control offset back to 0 MHz and your display will be 10.7 MHz which is the IF you are feeding into the QS1R. The Displayed Frequency Control offset does not make the QS1R receive on the selected offset - it only corrects the indicated frequency in SDRMAX when using the QS1R in under-sampling mode or using it as an IF receiver. You will receive some bandwidth +/- of the 10.7 MHz IF - it depends on bandwidth available at the R9000's IF output. You can use the Custom setting in SDRMAX, by entering a custom offset frequency, and this will offset the displayed frequency - for example, if you set the offset to -10.7 MHz, then the SDRMAX display will show 0 Hz when tuned to 10.7 MHz (your IF). The spectrum display then indicates +/- Hz deviation from your center frequency (10.7) with 0 Hz being in the middle of the display. So if you are seeing a signal at +50 kHz, then what the display is telling you is that the signal is 50 kHz higher (or lower) than the R9000's tuned frequency. If the R9000 is tuned to 900 MHz, then a signal at +50 kHz on the spectrum display is at 900.050 MHz (or at 899.950 MHz, depending on whether the R9000 IF's implementation). Phil -- and -- Yes, you can make the SDRMAX display read the same frequency that your receiver is tuned to. You will need to compute and set a custom offset in the Displayed Frequency Control settings. SDRMAX then will display the frequency that your R9000 is tuned to - unless you change the tuned frequency. If you do change it, you will have to enter a new offset. This absolute method works well if you keep your R9000 on the same frequency. If you move it around a lot, the bandspread method described is probably a better choice. The only way that SDRMAX could correct the offset on the fly as you tuned your R9000 is if SDRMAX was in communication with the R9000 reading its tuned frequency. This may be possible in the future when communications support is added to SDRMAX. (I wonder if OmniRig supports the R9000? I'll have to check that out
