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Re: Help me debug my spyverter
I unchecked the Shift box and it made absolutely no difference.
I unchecked the Shift box and it made absolutely no difference.
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By
Lyndxer
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#36327
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Re: Help me debug my spyverter
The connectors appear to be fine- no holes beside the inner socket. When using the Spyverter, I either connect it with the barrel connector that came with it or a separate SMA interconnect cable. Is
The connectors appear to be fine- no holes beside the inner socket. When using the Spyverter, I either connect it with the barrel connector that came with it or a separate SMA interconnect cable. Is
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By
Lyndxer
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#36326
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Re: New SDR# Release v1756 (2991c02) to follow Telerik Update
#announcements
Good morning. Can we consider v1756 as a final version for now or will newer versions appear soon?
--
Regards, Henk in NL
2 x Airspy R2, v1732
Good morning. Can we consider v1756 as a final version for now or will newer versions appear soon?
--
Regards, Henk in NL
2 x Airspy R2, v1732
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By
Magpie
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#36325
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Re: Exact tuning calculations
From: jdow
Look up the documentation for CuteSDR. Moe Wheatley did a good design document for it. It uses float or double. The results for float with regards to DSP performance rather than code
From: jdow
Look up the documentation for CuteSDR. Moe Wheatley did a good design document for it. It uses float or double. The results for float with regards to DSP performance rather than code
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By
David J Taylor
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#36324
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Re: Exact tuning calculations
On a general-purpose CPU, especially with an FPU, sure. Frequency calculations
lend themselves well to fixed-point because they have well-defined/limited range
determined by the hardware at
On a general-purpose CPU, especially with an FPU, sure. Frequency calculations
lend themselves well to fixed-point because they have well-defined/limited range
determined by the hardware at
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By
David J Taylor
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#36323
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Re: Help me debug my spyverter
Oh - shift - is the Shift tickbox checked?
{^_^}
Oh - shift - is the Shift tickbox checked?
{^_^}
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By
jdow
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#36322
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Re: Help me debug my spyverter
That suggests a damaged connector. Look at the inner contacts to see that the male appendage end goes straight into the female socket part of the connector. A telltale hole beside the
That suggests a damaged connector. Look at the inner contacts to see that the male appendage end goes straight into the female socket part of the connector. A telltale hole beside the
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By
jdow
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#36321
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Re: Help me debug my spyverter
I'm wondering if there's any connection between my earlier problem of the Spyverter's being way off (30Khz) in calibration?
I'm wondering if there's any connection between my earlier problem of the Spyverter's being way off (30Khz) in calibration?
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By
Lyndxer
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#36320
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Re: Help me debug my spyverter
I've connected/disconnected a few times, but am careful to connect in the correct direction.
Yes, I do see a massive birdy on 120Hhz.
The R2 is working well by itself.
I've connected/disconnected a few times, but am careful to connect in the correct direction.
Yes, I do see a massive birdy on 120Hhz.
The R2 is working well by itself.
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By
Lyndxer
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#36319
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Re: Help me debug my spyverter
Dave,
My Spyverter.does not have any indicator LEDs.
Dave,
My Spyverter.does not have any indicator LEDs.
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By
Lyndxer
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#36318
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Re: Help me debug my spyverter
Do you connect and disconnect frequently? Backwards probably will not work.
If you tune to 120 MHz do you see a massive birdy from the Spyverter LO?
You have tested that the R2
Do you connect and disconnect frequently? Backwards probably will not work.
If you tune to 120 MHz do you see a massive birdy from the Spyverter LO?
You have tested that the R2
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By
jdow
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#36317
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Re: Exact tuning calculations
Look up the documentation for CuteSDR. Moe Wheatley did a good design document for it. It uses float or double. The results for float with regards to DSP performance rather than code performance
Look up the documentation for CuteSDR. Moe Wheatley did a good design document for it. It uses float or double. The results for float with regards to DSP performance rather than code performance
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By
jdow
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#36316
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Re: External frequency reference for Airspy R2?
Not fully true, the Airspy HF+ can (currently/unofficially) receive part of the L-Band (1.2 GHz to 1.67 GHz). Both Japan and Italy use the 1500MHz band for LTE. So it is possible, just in a very
Not fully true, the Airspy HF+ can (currently/unofficially) receive part of the L-Band (1.2 GHz to 1.67 GHz). Both Japan and Italy use the 1500MHz band for LTE. So it is possible, just in a very
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By
Martin Smith
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#36315
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Re: Exact tuning calculations
Have you seen "A New Recursive Quadrature Oscillator" by Martin Vicanek? This seems to be more stable than most. It is also simple and quick.
{^_^}
Have you seen "A New Recursive Quadrature Oscillator" by Martin Vicanek? This seems to be more stable than most. It is also simple and quick.
{^_^}
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By
jdow
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#36314
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Re: Help me debug my spyverter
Do any of the indicator LED's on the SpyVerter illuminate when connected to the AirSpy with the Bias Tee turned ON? These LED's should turn on and off based on the bias tee setting.
Dave - WØLEV
I
Do any of the indicator LED's on the SpyVerter illuminate when connected to the AirSpy with the Bias Tee turned ON? These LED's should turn on and off based on the bias tee setting.
Dave - WØLEV
I
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By
W0LEV
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#36313
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Help me debug my spyverter
My Spyverter installation has suddenly become deaf. Here's what I did so far:
1.Checked the connection between the Airpsy R2 and the Spyverter. (The Airspy runs fine on its own.)
2. Opened the
My Spyverter installation has suddenly become deaf. Here's what I did so far:
1.Checked the connection between the Airpsy R2 and the Spyverter. (The Airspy runs fine on its own.)
2. Opened the
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By
Lyndxer
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#36312
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Re: SDR# I/Q Output
Hello Martin,
I have fixed the 96K audio sample rate modifying the config file.
Unfortunately it looks like the same fix doesn't work for the bandwidth which, no matter what I do, can't be set up
Hello Martin,
I have fixed the 96K audio sample rate modifying the config file.
Unfortunately it looks like the same fix doesn't work for the bandwidth which, no matter what I do, can't be set up
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By
Max Mucci, N5NHJ (I8NHJ)
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#36311
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Re: Exact tuning calculations
It very much depends on what one is doing.
Some observing modes are "spectral". Some could usefully use as much bandwidth as you can throw at them, since sensitivity
is proportional (all else
It very much depends on what one is doing.
Some observing modes are "spectral". Some could usefully use as much bandwidth as you can throw at them, since sensitivity
is proportional (all else
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By
Marcus D. Leech
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#36310
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Re: Exact tuning calculations
Do you need to cover the whole frequency range between these two? I
thought radio astronomy mainly looks at a few narrow bands. So use a
downconverter and an HF direct sampling receiver. You
Do you need to cover the whole frequency range between these two? I
thought radio astronomy mainly looks at a few narrow bands. So use a
downconverter and an HF direct sampling receiver. You
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By
Phil Karn
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#36309
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Re: Exact tuning calculations
Direct sampling at between 400MHz and 1.4GHz isn't exactly cheap...
Direct sampling at between 400MHz and 1.4GHz isn't exactly cheap...
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By
Marcus D. Leech
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#36308
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