开云体育

#sBitx Incorrect frequency display

#sBitx

Ichiro Ebara All Messages By This Member #95891 Hello all, I've been trying to find out what's going on with my sBitx. My sBitx frequency display seems to be incorrect. It shows about 10KHz higher. Where should I adjust it? 73 Ichiro,JE1JGC
Mark Earnest #95894 I have had this happen twice and restarting the sbitx software fixed it. Is this consistently happening to you? -- KB3LYB sBitx #077
Ichiro Ebara All Messages By This Member #95896 Restarting the sBitx software seems to have fixed it. I am comparing my listening with ICOM's IC-705 on CW, and the sBitx shows a lower frequency by about 600 Hz. Ichiro,JE1JGC
Anthony Good #95898 开云体育 I’ve seen this issue and similar things remedied by a restart. ?A common one is where you’re tuning and the spectrum display and waterfall shows the same recurring pattern of spikes and bumps, but there are no signals actually coming out the speaker. ?I think the SDR code gets into some weird state. ?We’ll eventually figure it out. The reason the sBitx would appear to be 600 Hz lower on CW is due to the way it calculates the frequency, I believe. ?All commercial rigs I’m aware of take the CW BFO into account when displaying the operating frequency. ?The sBitx on the other hand uses the PITCH setting and line on the spectrum display to show the user where to tune to get the CW beat note they want. ?The displayed frequency is the actual center frequency, not the frequency one would get the desired beat note. ?This is what I’ve gathered; I haven’t actually looked at the code to verify my thinking. toggle quoted message Show quoted text On Sep 16, 2022, at 10:39, Ichiro Ebara <je1jgc@...> wrote: Restarting the sBitx software seems to have fixed it. I am comparing my listening with ICOM's IC-705 on CW, and the sBitx shows a lower frequency by about 600 Hz. Ichiro,JE1JGC
Mark Earnest #95903 Ok, I'm glad I'm not the only one seeing the spikes and bumps thing :) I've also resolve that by switching bands back and forth.? -- KB3LYB sBitx #077
kc5kwz All Messages By This Member #95905 Mark, How has your experience been with the sBitx so far? I just placed an order. toggle quoted message Show quoted text On September 16, 2022 at 12:33 PM "Mark Earnest via groups.io" <mark@...> wrote: Ok, I'm glad I'm not the only one seeing the spikes and bumps thing :) I've also resolve that by switching bands back and forth.? -- KB3LYB sBitx #077 ?
Mark Earnest #95908 I like it, but I bought it to tinker around with. I've blown the finals a couple of times (it's very picky about SWR and turning the power down to tune does not always actually lower the power output) and I've worked around a few software bugs but I knew that getting into it. If you are looking for a rock solid finished product, this isn't it. If you are looking for an open source SDR radio in development to play around with, that's what you'll get :) I haven't had a chance to dig into the codebase as much as I want to so far, but I'm eagerly following along with Anthony's code branch and testing out new features as he adds them. -- KB3LYB sBitx #077
Ichiro Ebara All Messages By This Member #95920 I also compared the CW transmission. As with reception, it seems to be about 600 Hz higher than IC-705. I don't have any p roblem with SSB, so is this the way it is? 73 Ichiro,JE1JGC ?
Gordon Gibby KX4Z All Messages By This Member #95921 Try to measure the exact frequency of the internal oscillator standard used within the radio.? ?Perhaps it is just off a bit.? ?My older ICOM 718's are never quite perfect.? ? It was difficult to fix them.? ?But with the uBix and similar, a small change in the code can fix the frequency?correctly to match the internal oscillator's?actual frequency.? ? Sincerely, Gordon KX4Z toggle quoted message Show quoted text On Sat, Sep 17, 2022 at 7:07 AM Ichiro Ebara <je1jgc@...> wrote: I also compared the CW transmission. As with reception, it seems to be about 600 Hz higher than IC-705. I don't have any p roblem with SSB, so is this the way it is? 73 Ichiro,JE1JGC ?
Anthony Good #95922 开云体育 I’m planning to add a command that will change the calculated frequency behavoir on CW to account for the pitch.? toggle quoted message Show quoted text On Sep 17, 2022, at 07:06, Ichiro Ebara <je1jgc@...> wrote: I also compared the CW transmission. As with reception, it seems to be about 600 Hz higher than IC-705. I don't have any p roblem with SSB, so is this the way it is? 73 Ichiro,JE1JGC ? <sBitx_20220917.JPG>
Anthony Good #95924 开云体育 I have added a command to account for CW pitch in the VFO display frequency. ?You can try this code by executing in a terminal window: cd /home/pi git clone? cd sbitx-k3ng git pull git checkout?2022.09.15 ./build sbitx ./sbitx The command syntax is: \addcwpitch [on\|off] This development code version also adds functionality to the spectrum display to center on the CW pitch when changing SPAN. ?I’m also playing around with improving iambic CW keying with an Interrupt Service Routine reading the paddle. ?This part is a work in progress…. Please test \addcwpitch and let me know how this works for you. 73 Goody K3NG toggle quoted message Show quoted text On Sep 17, 2022, at 07:51, Anthony Good via <anthony.good@...> wrote: I’m planning to add a command that will change the calculated frequency behavoir on CW to account for the pitch.? On Sep 17, 2022, at 07:06, Ichiro Ebara <je1jgc@...> wrote: I also compared the CW transmission. As with reception, it seems to be about 600 Hz higher than IC-705. I don't have any p roblem with SSB, so is this the way it is? 73 Ichiro,JE1JGC ??<sBitx_20220917.JPG>
PeteWK8S #95943 Goody, here are my results using Icom 7610 and the sBitx each using 700Hz pitch for the \addcwpitch ?on and off First transmitting on 7610 then transmitting on sBitx ---- both units using Dummy Loads ? \addcwpitch ON IC7610 ?TX on 14.060.00? sBitx ? ? RX on 14.060.70 ? (up 700Hz) ------------------------------------- IC7610 ?RX on 14.060.00 sBitx ? ? TX ?on 14.060.00 ========================== \addcwpitch OFF IC7610 TX on 14.060.00 sBitx ? ?RX on 14.060.00 ------------------------------ IC7610 RX on 14.060.70 ?(up 700Hz) sBitx ? ?TX ?on 14.060.00 Pete WK8S?
Anthony Good #95946 开云体育 Thanks, Pete. On the sBitx were you in CW or CWR mode? toggle quoted message Show quoted text On Sep 17, 2022, at 16:20, PeteWK8S via <pmeier@...> wrote: Goody, here are my results using Icom 7610 and the sBitx each using 700Hz pitch for the \addcwpitch ?on and off First transmitting on 7610 then transmitting on sBitx ---- both units using Dummy Loads ? \addcwpitch ON IC7610 ?TX on 14.060.00? sBitx ? ? RX on 14.060.70 ? (up 700Hz) ------------------------------------- IC7610 ?RX on 14.060.00 sBitx ? ? TX ?on 14.060.00 ========================== \addcwpitch OFF IC7610 TX on 14.060.00 sBitx ? ?RX on 14.060.00 ------------------------------ IC7610 RX on 14.060.70 ?(up 700Hz) sBitx ? ?TX ?on 14.060.00 Pete WK8S?
PeteWK8S #95957 The test was done in CW (not CWR) for both radios. Pete WK8S
Ichiro Ebara All Messages By This Member #95958 (1)MODE:CW \addcwpitch ON IC-705 ?TX on 7.030.00 sBitx ? ? RX on 7.030.70 ? (up 700Hz)? -->Spectrum and frequency displays are misaligned? ------------------------------------- IC-705 ?RX on 7.030.00 sBitx ? ? TX ?on 7.030.00 ========================== (2)MODE:CWR \addcwpitch ON IC-705 ?TX on 7.030.00 sBitx ? ? RX on 7.030.70 ? (up 700Hz) ------------------------------------- IC-705 ?RX on 7.030.00 sBitx ? ? TX ?on 7.030.00 ========================== \addcwpitch OFF IC-705 TX on 7.030.00 sBitx ?RX on 7.030.00 ?--->Spectrum and frequency displays are misaligned? ------------------------------ IC-705 RX on 7.029.30 ?(down 700Hz) sBitx ?TX on 7.030.00

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