Date   

Re: LimeSDR

Allan Isaacs
 

I decided on tuning 50 to 80MHz because that band is relatively free from signals here and the Lime minus its tiny shunt coil receives that band really well.

I’m using a low pass filter with a sharp cut off about 31MHz and a band pass filter 50-80MHz and with these the local FM broadcast stations are almost eliminated from the converter output if I tune it to say 88.5MHz I see only -102dBm.

Around here 125MHz to 155MHz has lots of very strong aircraft signals so any converters using that band would need a decent filter.

 

Is your Lime RX-L input still fitted with coil MN34, 8.2nH. The Lime site has details for removing it. If it’s still in place you’ll get poor results because it represents a shunt of around 1.5 ohms at 30MHz. The two filter capacitors are 510pF so at 7MHz are about 90 ohms. The input has a 470pF in series with the connector and at 7MHz, 50 ohms this will halve the signal. Adding 100nF chips across these will help but I haven’t done this yet.

 

Allan G3PIY

 

 

 


From: sdr-radio-com@... [mailto:sdr-radio-com@...]
Sent: 29 April 2017 15:26
To: sdr-radio-com@...
Subject: Re: [sdr-radio-com] LimeSDR

 

 

Hi Allan,

What is your up-conversion frequency? I have used the Noolelec up-convertor which shifts the HF spectrum up to 125 Mhz. However; according to the LimeSDR input ranges, the starting range is 700 MHz. While the up-convertor does work, its not really up to the performance of a high performance HF receiver. Not only receive, but transmit is also a workaround problem for HF.

I think the best solution is to design the input and out put filters for HF and VHF use, regardless if direct or transvertor use. Need SPICE models primarily for the transformers, to design the i/o filters. While direct connection may work, a transvertor scheme may work better. The blip in the middle is eliminated. The spectrum is shifted to avoid the zero image of a direct conversion scheme. The LimeSDR phase correction does not really work well, especially for weak signal communication. On VHF I see the blip in the middle which is indicative of IQ phase and amplitude anomalies.

 

 

On 4/29/2017 5:52 AM, 'Allan Isaacs' allan@... [sdr-radio-com] wrote:

 

Hi Numeric

There’s lots of information and grumbles from buyers re the Lime SDR on the Net and I’ve added a discourse to my website.

It seems the designers and advertisers mustn’t have been in sync during the period from inception to manufacture.

I assume it’s that, otherwise it would seem to be a confidence trick to release a piece of HF kit that is 80dB down on expected performance.

After its release the Lime people suggested some modifications and indeed carried these out before supplying later examples.

Performance at HF is way down on what is generally acceptable but the thing is certainly tunable from below 100KHz.

I’ve been testing the thing and I’ve decided that the obvious way forward, other than selling it, is to add an upconverter.

My idea was to make such a device which could be easily reproduced by anyone armed with a soldering iron and a few pounds (or dollars etc). Yesterday I finished the construction of a simple prototype which allows one to hear signals down to a microvolt or two from a few KHz to 30MHz.

There are advantages of using the Lime, or any other SDR, this way because spurious responses can be minimised.

I haven’t tried it on transmit, but again a converter may be the best solution for users in the HF bands.

Essentially the Lime is OK if you’re a radio ham and prepared to experiment, but not if you’re a black box user.

http://www.radiomuseum.co.uk/SDR.html

 

 

 

 

 


Re: LimeSDR

Rob Ram
 

Hi Allan,

What is your up-conversion frequency? I have used the Noolelec up-convertor which shifts the HF spectrum up to 125 Mhz. However; according to the LimeSDR input ranges, the starting range is 700 MHz. While the up-convertor does work, its not really up to the performance of a high performance HF receiver. Not only receive, but transmit is also a workaround problem for HF.

I think the best solution is to design the input and out put filters for HF and VHF use, regardless if direct or transvertor use. Need SPICE models primarily for the transformers, to design the i/o filters. While direct connection may work, a transvertor scheme may work better. The blip in the middle is eliminated. The spectrum is shifted to avoid the zero image of a direct conversion scheme. The LimeSDR phase correction does not really work well, especially for weak signal communication. On VHF I see the blip in the middle which is indicative of IQ phase and amplitude anomalies.



On 4/29/2017 5:52 AM, 'Allan Isaacs' allan@... [sdr-radio-com] wrote:

�

Hi Numeric

There�s lots of information and grumbles from buyers re the Lime SDR on the Net and I�ve added a discourse to my website.

It seems the designers and advertisers mustn�t have been in sync during the period from inception to manufacture.

I assume it�s that, otherwise it would seem to be a confidence trick to release a piece of HF kit that is 80dB down on expected performance.

After its release the Lime people suggested some modifications and indeed carried these out before supplying later examples.

Performance at HF is way down on what is generally acceptable but the thing is certainly tunable from below 100KHz.

I�ve been testing the thing and I�ve decided that the obvious way forward, other than selling it, is to add an upconverter.

My idea was to make such a device which could be easily reproduced by anyone armed with a soldering iron and a few pounds (or dollars etc). Yesterday I finished the construction of a simple prototype which allows one to hear signals down to a microvolt or two from a few KHz to 30MHz.

There are advantages of using the Lime, or any other SDR, this way because spurious responses can be minimised.

I haven�t tried it on transmit, but again a converter may be the best solution for users in the HF bands.

Essentially the Lime is OK if you�re a radio ham and prepared to experiment, but not if you�re a black box user.

http://www.radiomuseum.co.uk/SDR.html

�

�

�




Re: LimeSDR

MIKE DURKIN <Patriot121@...>
 

My limeSDR must be different from the rest of the complainers .....

Sensitivity is lower than my UHFSDR .... but not this 40db nonsense sputtered about without using test equipment.

My only complaint is the 70db range of the ADC, wish it was 16bit


From: sdr-radio-com@... <sdr-radio-com@...> on behalf of Dennis Smith m1dlguk@... [sdr-radio-com] <sdr-radio-com@...>
Sent: Saturday, April 29, 2017 3:30:52 AM
To: sdr-radio-com@...
Subject: Re: [sdr-radio-com] LimeSDR
 
 

I've been thinking of getting a LimeSDR, and this thread has made me think maybe not. Your screenshot shows an impressive bandscan, with a large 2MHz wide chunk that seems to be a lot quieter than the rest of the signals starting about 1.8MHz and 2.8MHz. Is this a performance issue? or do you have a filter for that part of the band inline or is the band just quieter for you at that point in time? 

Dennis Smith
M1DLG

On 29 April 2017 at 04:51, Paul Jones paul@... [sdr-radio-com] <sdr-radio-com@...> wrote:



Here's my lime at 25Mhz wide on HF... Some great signals




Paul Jones - NN4F
Ridgeville, SC EM93TB

Email: paul@...
Facebook.com/groups/sdrplay




On Fri, Apr 28, 2017 at 11:44 PM, Paul Jones <paul@...> wrote:
Well the lime is working quite well on HF here, not perfect, but it works, did you get a secon batch that was modified ot did you modify your own?
There are some broadcast FM images on HF, still, but it does work, I wouldn't call it a POS at all,m VHF RX works great also...

Paul - NN4F

Paul Jones - NN4F
Ridgeville, SC EM93TB

Email: paul@...
Facebook.com/groups/sdrplay




On Fri, Apr 28, 2017 at 11:38 PM, numeric numeric@... [sdr-radio-com] <sdr-radio-com@...> wrote:
 

Hello,

I started playing around with the LimeSDR. So, far not really
impressive. I Tried using the Noolelec up convertor but has poor
performance compared with the QSR1 16 bit A/D direct sampling SDR
receiver. The specifications state a frequency range of 100 kHz – 3.8
GHz for the LimeSDR with an application for ham radio use. However; the
RF input range is broken into three bands:

1. Low 700 MHz - 900 MHz. That is 700 MHz not 70MHz!!!

2. Wide: 700 MHz - 2.6 GHz

3. High: 2 GHz - 2.6 GHz

What the hell happened to 100KHz to 700 MHZ?

The transmit mode does not even match the receive bands.

Transmit provides two bands:

1. 30 MHz - 1.9 GHz

2. 2 GHz - 2.6 GHz

Obviously the LimeSDR does not serve the HF and the VHF ham bands. OK
for the 900 MHz ham and micro wave ham bands. I was hoping to use the
LimeSDR as a wide band VNA (Vector Network Analyzer); but the filters
screw up my plans.

At least the LimeSDR builders could provide SPICE models for the
transformers and the LMS7002M RF input and output ports. I suspect that
the LimeSDR could easily provide broadband continuous coverage if the
current RF stage were replaced. Hoping for a positive outcome, but at
currently the LimeSDR is a POS!

Also, the LimeSDR gets HOT!! May be about 110 degrees F.

Rant:

Why the 700 MHZ coverage, unless the evil telcos out there want to steel
the 700 TV broadcast band for their own profit. Best part of steeling
public spectrum is that you can get cell phone users to pay to access
their own spectrum. I know about the FCC auctions; should have been
halted from the very start. Recently many TV broadcasters have elected
to give up their spectrum, they are going off air. The FCC fcc.gov has
identified the broadcasters going off-air.







Re: Hermes SDR/anan 10 freezes

Barry Jablonski
 

Hi Ryan,

Just a comment on the Hermes powering issue.  I have the TAPR Hermes and the Apache ANAN-10
PA/filter/enclosure.  The issue I found is that the thermal re-settable "fuse" F3 is rated for a hold current
(Ihold) of 1.1A (part# MF-MSMF110/16-2CT-ND).  When running older  v3.2 FPGA code, I measured the
current through F3 to be 1.6 A.  Hence my note to the apache-labs group.

Check your 5v current draw.  And, heatsink those LDO regulators!

Barry
WB2ZXJ


Re: LimeSDR

Dennis Smith
 

I've been thinking of getting a LimeSDR, and this thread has made me think maybe not. Your screenshot shows an impressive bandscan, with a large 2MHz wide chunk that seems to be a lot quieter than the rest of the signals starting about 1.8MHz and 2.8MHz. Is this a performance issue? or do you have a filter for that part of the band inline or is the band just quieter for you at that point in time? 

Dennis Smith
M1DLG

On 29 April 2017 at 04:51, Paul Jones paul@... [sdr-radio-com] <sdr-radio-com@...> wrote:


Here's my lime at 25Mhz wide on HF... Some great signals




Paul Jones - NN4F
Ridgeville, SC EM93TB

Email: paul@...
Facebook.com/groups/sdrplay




On Fri, Apr 28, 2017 at 11:44 PM, Paul Jones <paul@...> wrote:
Well the lime is working quite well on HF here, not perfect, but it works, did you get a secon batch that was modified ot did you modify your own?
There are some broadcast FM images on HF, still, but it does work, I wouldn't call it a POS at all,m VHF RX works great also...

Paul - NN4F

Paul Jones - NN4F
Ridgeville, SC EM93TB

Email: paul@...
Facebook.com/groups/sdrplay




On Fri, Apr 28, 2017 at 11:38 PM, numeric numeric@... [sdr-radio-com] <sdr-radio-com@...> wrote:
 

Hello,

I started playing around with the LimeSDR. So, far not really
impressive. I Tried using the Noolelec up convertor but has poor
performance compared with the QSR1 16 bit A/D direct sampling SDR
receiver. The specifications state a frequency range of 100 kHz – 3.8
GHz for the LimeSDR with an application for ham radio use. However; the
RF input range is broken into three bands:

1. Low 700 MHz - 900 MHz. That is 700 MHz not 70MHz!!!

2. Wide: 700 MHz - 2.6 GHz

3. High: 2 GHz - 2.6 GHz

What the hell happened to 100KHz to 700 MHZ?

The transmit mode does not even match the receive bands.

Transmit provides two bands:

1. 30 MHz - 1.9 GHz

2. 2 GHz - 2.6 GHz

Obviously the LimeSDR does not serve the HF and the VHF ham bands. OK
for the 900 MHz ham and micro wave ham bands. I was hoping to use the
LimeSDR as a wide band VNA (Vector Network Analyzer); but the filters
screw up my plans.

At least the LimeSDR builders could provide SPICE models for the
transformers and the LMS7002M RF input and output ports. I suspect that
the LimeSDR could easily provide broadband continuous coverage if the
current RF stage were replaced. Hoping for a positive outcome, but at
currently the LimeSDR is a POS!

Also, the LimeSDR gets HOT!! May be about 110 degrees F.

Rant:

Why the 700 MHZ coverage, unless the evil telcos out there want to steel
the 700 TV broadcast band for their own profit. Best part of steeling
public spectrum is that you can get cell phone users to pay to access
their own spectrum. I know about the FCC auctions; should have been
halted from the very start. Recently many TV broadcasters have elected
to give up their spectrum, they are going off air. The FCC fcc.gov has
identified the broadcasters going off-air.







Re: LimeSDR

Allan Isaacs
 

Hi Numeric

There’s lots of information and grumbles from buyers re the Lime SDR on the Net and I’ve added a discourse to my website.

It seems the designers and advertisers mustn’t have been in sync during the period from inception to manufacture.

I assume it’s that, otherwise it would seem to be a confidence trick to release a piece of HF kit that is 80dB down on expected performance.

After its release the Lime people suggested some modifications and indeed carried these out before supplying later examples.

Performance at HF is way down on what is generally acceptable but the thing is certainly tunable from below 100KHz.

I’ve been testing the thing and I’ve decided that the obvious way forward, other than selling it, is to add an upconverter.

My idea was to make such a device which could be easily reproduced by anyone armed with a soldering iron and a few pounds (or dollars etc). Yesterday I finished the construction of a simple prototype which allows one to hear signals down to a microvolt or two from a few KHz to 30MHz.

There are advantages of using the Lime, or any other SDR, this way because spurious responses can be minimised.

I haven’t tried it on transmit, but again a converter may be the best solution for users in the HF bands.

Essentially the Lime is OK if you’re a radio ham and prepared to experiment, but not if you’re a black box user.

http://www.radiomuseum.co.uk/SDR.html

 

During testing I’ve noticed a few odd things that may be of interest. All these observations are only minor.

 

(1) Turning on a computer that has a Lime plugged into a USB3 port sometimes requires the device to be unplugged then re-connected otherwise its listed as an unrecognisable device that according to Microsoft is “working normally”. Simon’s program cannot see this unrecognisable device until it reappears in the computer’s hardware listing under Universal Serial Bus Controllers as “Myriad-RF LimeSDR-USB”. It sometimes takes several re-plugs to achieve this. I imagine this problem is probably due to something I’m not doing right.

(2) Another problem concerns intermittent contact with the USB sockets. Because the supplied lead is rather stiff sometimes the connection breaks, especially with worn USB sockets. This can result in freezing of the program. Also, if a Lime is unplugged the program can lock up.

(3) Switching to a different bandwidth can take quite a long time (ie not instantaneous) and one can easily assume something has gone wrong, so patience is needed not lots of mouse clicks…

 

(4) Finally, in the centre of a picture I can always see a small ghost signal. This can vary in amplitude somewhat, but if you’re tuned to a broadcast that happens to be in the exact centre of the display you can get audio distortion. Moving to one side of centre sorts this out. Some gain settings can push the ghost signal below the noise baseline so it appears as a dip instead of a peak. I’d be interested in hearing more about this…

 

Allan G3PIY


From: sdr-radio-com@... [mailto:sdr-radio-com@...]
Sent: 29 April 2017 04:38
To: sdr-radio-com@...
Subject: [sdr-radio-com] LimeSDR

 

 

Hello,

I started playing around with the LimeSDR. So, far not really
impressive. I Tried using the Noolelec up convertor but has poor
performance compared with the QSR1 16 bit A/D direct sampling SDR
receiver. The specifications state a frequency range of 100 kHz – 3.8
GHz for the LimeSDR with an application for ham radio use. However; the
RF input range is broken into three bands:

1. Low 700 MHz - 900 MHz. That is 700 MHz not 70MHz!!!

2. Wide: 700 MHz - 2.6 GHz

3. High: 2 GHz - 2.6 GHz

What the hell happened to 100KHz to 700 MHZ?

The transmit mode does not even match the receive bands.

Transmit provides two bands:

1. 30 MHz - 1.9 GHz

2. 2 GHz - 2.6 GHz

Obviously the LimeSDR does not serve the HF and the VHF ham bands. OK
for the 900 MHz ham and micro wave ham bands. I was hoping to use the
LimeSDR as a wide band VNA (Vector Network Analyzer); but the filters
screw up my plans.

At least the LimeSDR builders could provide SPICE models for the
transformers and the LMS7002M RF input and output ports. I suspect that
the LimeSDR could easily provide broadband continuous coverage if the
current RF stage were replaced. Hoping for a positive outcome, but at
currently the LimeSDR is a POS!

Also, the LimeSDR gets HOT!! May be about 110 degrees F.

Rant:

Why the 700 MHZ coverage, unless the evil telcos out there want to steel
the 700 TV broadcast band for their own profit. Best part of steeling
public spectrum is that you can get cell phone users to pay to access
their own spectrum. I know about the FCC auctions; should have been
halted from the very start. Recently many TV broadcasters have elected
to give up their spectrum, they are going off air. The FCC fcc.gov has
identified the broadcasters going off-air.


Re: Hermes SDR/anan 10 freezes

Simon Brown
 

Ryan,

 

I’ve invited you to the test team. You *must* provide logfiles, otherwise I can’t help further.

 

Simon Brown, G4ELI
http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...]
Sent: 29 April 2017 07:34
To: sdr-radio-com@...
Subject: [sdr-radio-com] Re: Hermes SDR/anan 10 freezes

 

 

Simon,

Thank you for the response. I was not expecting to hear from you this quickly. Basically the software runs for about 5 seconds and then just stops. I can restart it over and over without closing it out. It never crashes. Previously you said I was running a firmware that was too old and the software was very strict about that. I have now updated to the latest. I need to get some sleep myself. I will post a log file as soon as I can get back to the computer hopefully within the next 12 hours. Thanks again.

Ryan
KK6DZB


Re: Hermes SDR/anan 10 freezes

Ryan Wesolowski
 

Simon,

Thank you for the response. I was not expecting to hear from you this quickly. Basically the software runs for about 5 seconds and then just stops. I can restart it over and over without closing it out. It never crashes. Previously you said I was running a firmware that was too old and the software was very strict about that. I have now updated to the latest. I need to get some sleep myself. I will post a log file as soon as I can get back to the computer hopefully within the next 12 hours. Thanks again.

Ryan
KK6DZB


Re: Hermes SDR/anan 10 freezes

Simon Brown
 

Even programmers sleep…

 

FWIW It’s running quite well with the 8000DLE but there are a few bugs being ironed out of the 8000DLE’s firmware (not by me).

 

Simon Brown, G4ELI
http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...]

Patiently waiting for Simon to chime in.

Ryan
KK6DZB


Re: Hermes SDR/anan 10 freezes

Simon Brown
 

Ryan,

 

What problem? I honestly don’t remember the previous thread. Without logfiles etc. I have no idea what’s happening. I’ll invite you to the test team where we’re using much newer code.

 

Simon Brown, G4ELI
http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...]
Sent: 29 April 2017 03:48
To: sdr-radio-com@...
Subject: [sdr-radio-com] Re: Hermes SDR/anan 10 freezes

 

 

Simon,

I am bringing this back from the dead. I have updated to the latest protocol 2 firmware 10.3 for the anan 10 and 100 16 bit hermes (not 10e or 100b) and I am having the same problem. I know you said your software does a strict firmware check so maybe it does not recognize the latest firmware? Really looking forward to testing your software on transmit and receive!

Ryan
KK6DZB


Re: reverting back to version 2 from version 3

Simon Brown
 

It can’t get the dongle started to find the list of sample rates.

 

Can you discover the dongle or is this an old definition?

 

Simon Brown, G4ELI
http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...]
Sent: 28 April 2017 17:29
To: sdr-radio-com@...
Subject: [sdr-radio-com] reverting back to version 2 from version 3

 

 

Tried Version 3 of SDR Console today and now wanting to go back to Version 2 however even after adding the xml registration, Version 2 won't un-grey the Start button for selecting the RTL dongle ... there is also no way to add a scan frequency



Ideas?











Re: Hermes SDR/anan 10 freezes

Ryan Wesolowski
 

Barry,

I figured it was something like that. I am guessing the website version supports 10.2. Thanks for the response. I have a homebrew apache hermes here built from a bare board with homebrew alex boards. I run a 5v 5amp linear supply so I guess I wont have to worry about the onboard switching supply problem they are having. Hopefully they will come out with the gigabit version of protocol 2 for us to test soon. Patiently waiting for Simon to chime in.

Ryan
KK6DZB


Re: Hermes SDR/anan 10 freezes

Barry Jablonski
 

Hi Ryan,

We will have to wait for Simon to comment on what Hermes support he may added to V3 since he released
preview 5a.  I'm using a test release.

On a positive note -- the next preview should support your radio.

Barry
WB2ZXJ


Re: LimeSDR

Paul NN4F
 

Here's my lime at 25Mhz wide on HF... Some great signals




Paul Jones - NN4F
Ridgeville, SC EM93TB

Email: paul@...
Facebook.com/groups/sdrplay




On Fri, Apr 28, 2017 at 11:44 PM, Paul Jones <paul@...> wrote:
Well the lime is working quite well on HF here, not perfect, but it works, did you get a secon batch that was modified ot did you modify your own?
There are some broadcast FM images on HF, still, but it does work, I wouldn't call it a POS at all,m VHF RX works great also...

Paul - NN4F

Paul Jones - NN4F
Ridgeville, SC EM93TB

Email: paul@...
Facebook.com/groups/sdrplay




On Fri, Apr 28, 2017 at 11:38 PM, numeric numeric@... [sdr-radio-com] <sdr-radio-com@...> wrote:
 

Hello,

I started playing around with the LimeSDR. So, far not really
impressive. I Tried using the Noolelec up convertor but has poor
performance compared with the QSR1 16 bit A/D direct sampling SDR
receiver. The specifications state a frequency range of 100 kHz – 3.8
GHz for the LimeSDR with an application for ham radio use. However; the
RF input range is broken into three bands:

1. Low 700 MHz - 900 MHz. That is 700 MHz not 70MHz!!!

2. Wide: 700 MHz - 2.6 GHz

3. High: 2 GHz - 2.6 GHz

What the hell happened to 100KHz to 700 MHZ?

The transmit mode does not even match the receive bands.

Transmit provides two bands:

1. 30 MHz - 1.9 GHz

2. 2 GHz - 2.6 GHz

Obviously the LimeSDR does not serve the HF and the VHF ham bands. OK
for the 900 MHz ham and micro wave ham bands. I was hoping to use the
LimeSDR as a wide band VNA (Vector Network Analyzer); but the filters
screw up my plans.

At least the LimeSDR builders could provide SPICE models for the
transformers and the LMS7002M RF input and output ports. I suspect that
the LimeSDR could easily provide broadband continuous coverage if the
current RF stage were replaced. Hoping for a positive outcome, but at
currently the LimeSDR is a POS!

Also, the LimeSDR gets HOT!! May be about 110 degrees F.

Rant:

Why the 700 MHZ coverage, unless the evil telcos out there want to steel
the 700 TV broadcast band for their own profit. Best part of steeling
public spectrum is that you can get cell phone users to pay to access
their own spectrum. I know about the FCC auctions; should have been
halted from the very start. Recently many TV broadcasters have elected
to give up their spectrum, they are going off air. The FCC fcc.gov has
identified the broadcasters going off-air.




Re: LimeSDR

Paul NN4F
 

Well the lime is working quite well on HF here, not perfect, but it works, did you get a secon batch that was modified ot did you modify your own?
There are some broadcast FM images on HF, still, but it does work, I wouldn't call it a POS at all,m VHF RX works great also...

Paul - NN4F

Paul Jones - NN4F
Ridgeville, SC EM93TB

Email: paul@...
Facebook.com/groups/sdrplay




On Fri, Apr 28, 2017 at 11:38 PM, numeric numeric@... [sdr-radio-com] <sdr-radio-com@...> wrote:
 

Hello,

I started playing around with the LimeSDR. So, far not really
impressive. I Tried using the Noolelec up convertor but has poor
performance compared with the QSR1 16 bit A/D direct sampling SDR
receiver. The specifications state a frequency range of 100 kHz – 3.8
GHz for the LimeSDR with an application for ham radio use. However; the
RF input range is broken into three bands:

1. Low 700 MHz - 900 MHz. That is 700 MHz not 70MHz!!!

2. Wide: 700 MHz - 2.6 GHz

3. High: 2 GHz - 2.6 GHz

What the hell happened to 100KHz to 700 MHZ?

The transmit mode does not even match the receive bands.

Transmit provides two bands:

1. 30 MHz - 1.9 GHz

2. 2 GHz - 2.6 GHz

Obviously the LimeSDR does not serve the HF and the VHF ham bands. OK
for the 900 MHz ham and micro wave ham bands. I was hoping to use the
LimeSDR as a wide band VNA (Vector Network Analyzer); but the filters
screw up my plans.

At least the LimeSDR builders could provide SPICE models for the
transformers and the LMS7002M RF input and output ports. I suspect that
the LimeSDR could easily provide broadband continuous coverage if the
current RF stage were replaced. Hoping for a positive outcome, but at
currently the LimeSDR is a POS!

Also, the LimeSDR gets HOT!! May be about 110 degrees F.

Rant:

Why the 700 MHZ coverage, unless the evil telcos out there want to steel
the 700 TV broadcast band for their own profit. Best part of steeling
public spectrum is that you can get cell phone users to pay to access
their own spectrum. I know about the FCC auctions; should have been
halted from the very start. Recently many TV broadcasters have elected
to give up their spectrum, they are going off air. The FCC fcc.gov has
identified the broadcasters going off-air.



LimeSDR

Rob Ram
 

Hello,

I started playing around with the LimeSDR. So, far not really
impressive. I Tried using the Noolelec up convertor but has poor
performance compared with the QSR1 16 bit A/D direct sampling SDR
receiver. The specifications state a frequency range of 100 kHz – 3.8
GHz for the LimeSDR with an application for ham radio use. However; the
RF input range is broken into three bands:

1. Low 700 MHz - 900 MHz. That is 700 MHz not 70MHz!!!

2. Wide: 700 MHz - 2.6 GHz

3. High: 2 GHz - 2.6 GHz

What the hell happened to 100KHz to 700 MHZ?

The transmit mode does not even match the receive bands.

Transmit provides two bands:

1. 30 MHz - 1.9 GHz

2. 2 GHz - 2.6 GHz


Obviously the LimeSDR does not serve the HF and the VHF ham bands. OK
for the 900 MHz ham and micro wave ham bands. I was hoping to use the
LimeSDR as a wide band VNA (Vector Network Analyzer); but the filters
screw up my plans.

At least the LimeSDR builders could provide SPICE models for the
transformers and the LMS7002M RF input and output ports. I suspect that
the LimeSDR could easily provide broadband continuous coverage if the
current RF stage were replaced. Hoping for a positive outcome, but at
currently the LimeSDR is a POS!

Also, the LimeSDR gets HOT!! May be about 110 degrees F.


Rant:

Why the 700 MHZ coverage, unless the evil telcos out there want to steel
the 700 TV broadcast band for their own profit. Best part of steeling
public spectrum is that you can get cell phone users to pay to access
their own spectrum. I know about the FCC auctions; should have been
halted from the very start. Recently many TV broadcasters have elected
to give up their spectrum, they are going off air. The FCC fcc.gov has
identified the broadcasters going off-air.


Re: Hermes SDR/anan 10 freezes

Ryan Wesolowski
 

Barry,

Yes i tried it with thetis first. Works just fine. Sdr console freezes after about 5 seconds. I am using preview 5a from the website. I don't see anything newer.

Ryan
KK6DZB


Re: Hermes SDR/anan 10 freezes

Barry Jablonski
 

Hi Ryan,

I updated my ANAN-10 with v10.3 (Protocol 2) and it works with the V3 Console (Apr 23, build 757).
Have you tried it with Thetis?

Barry
WB2ZXJ


Re: Hermes SDR/anan 10 freezes

Ryan Wesolowski
 

Simon,

I am bringing this back from the dead. I have updated to the latest protocol 2 firmware 10.3 for the anan 10 and 100 16 bit hermes (not 10e or 100b) and I am having the same problem. I know you said your software does a strict firmware check so maybe it does not recognize the latest firmware? Really looking forward to testing your software on transmit and receive!

Ryan
KK6DZB


reverting back to version 2 from version 3

bxdobs <bxdobs@...>
 

Tried Version 3 of SDR Console today and now wanting to go back to Version 2 however even after adding the xml registration, Version 2 won't un-grey the Start button for selecting the RTL dongle ... there is also no way to add a scan frequency



Ideas?