Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Miscellaneous Sections
Tech Head - The Technology Section
SDR radio, Software Defined Radio
The Aero Thread..
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Vipersan" data-source="post: 967041" data-attributes="member: 325666"><p>Installed the new Titanium C1PLL ...and tested it with SDR# ..</p><p>What have a learned so far ..</p><p>Signals are more pronounced and the background noise is much reduced ..</p><p>The signals really 'pop' out now ...so perhaps the old C1PLL was not working as well as it could.</p><p></p><p>I can now use this PLL combo with SDR# ...which means I can perhaps try for 2 x channels ?</p><p></p><p>But to the main question ...the very evisent drift ..</p><p>Well ..there were 2 possibilites ..SDRplay thermal drift ..or LNB drift..</p><p>Removed the SDR play and lifted it clear of the Optiplex ..so not affected by internal heat sources ..and powered up the PC and ran up SDR# ..</p><p>Switched on the C-band lnb ...and took my first screen grab at 19:05 ...</p><p>It was immediately apparent I was in the right spectral region ...</p><p>I then took further screen images at 19:15 ...then 19:30 and lastly 20:00</p><p>a tiny drift was evident but not enough to be an issue ..</p><p>This was NOT the case with the ESX non Pll ..which powered up miles off target ..and drifted quite substantially over time...</p><p>See for yourself with the 4 images ...</p><p>So imo PLL is important..</p><p>BUT ..this is not the end of the story ...</p><p>without powering anything down I re-buried the SDRplay under the DVD drive and directly on to of the Optiplex hard drive ...thus will inevitably get warm ..</p><p>That was at 20:15 ...and it is now 20:40 ..</p><p>Unsurprisingly the chosen frequency has drifted ..but Surprisingly is still within the correct region of the spectrum ...</p><p>The amount drifted is roughly so far is about the width of one of aero data burst streams ..</p><p>So ..my thoughts on this ..errr...problem .</p><p>Well I can't keep the SDRplay unit cool ...but what I can do is rely on the sandwiched position and the heat from the hard drive to stabilise the SDRplay once the PC has been on for about 10 minutes.</p><p>..thus hopefully preventing SDRplay vxo drift of huge proportion once the pcs internal temerature reaches optimum.</p><p>What I can say is that imo the largest problem of the 2 was indeed the LNB ..and that PLL IS important to this particular experiment.</p><p>rgds</p><p>VS[ATTACH=full]92086[/ATTACH] [ATTACH=full]92087[/ATTACH] [ATTACH=full]92088[/ATTACH] [ATTACH=full]92089[/ATTACH]</p></blockquote><p></p>
[QUOTE="Vipersan, post: 967041, member: 325666"] Installed the new Titanium C1PLL ...and tested it with SDR# .. What have a learned so far .. Signals are more pronounced and the background noise is much reduced .. The signals really 'pop' out now ...so perhaps the old C1PLL was not working as well as it could. I can now use this PLL combo with SDR# ...which means I can perhaps try for 2 x channels ? But to the main question ...the very evisent drift .. Well ..there were 2 possibilites ..SDRplay thermal drift ..or LNB drift.. Removed the SDR play and lifted it clear of the Optiplex ..so not affected by internal heat sources ..and powered up the PC and ran up SDR# .. Switched on the C-band lnb ...and took my first screen grab at 19:05 ... It was immediately apparent I was in the right spectral region ... I then took further screen images at 19:15 ...then 19:30 and lastly 20:00 a tiny drift was evident but not enough to be an issue .. This was NOT the case with the ESX non Pll ..which powered up miles off target ..and drifted quite substantially over time... See for yourself with the 4 images ... So imo PLL is important.. BUT ..this is not the end of the story ... without powering anything down I re-buried the SDRplay under the DVD drive and directly on to of the Optiplex hard drive ...thus will inevitably get warm .. That was at 20:15 ...and it is now 20:40 .. Unsurprisingly the chosen frequency has drifted ..but Surprisingly is still within the correct region of the spectrum ... The amount drifted is roughly so far is about the width of one of aero data burst streams .. So ..my thoughts on this ..errr...problem . Well I can't keep the SDRplay unit cool ...but what I can do is rely on the sandwiched position and the heat from the hard drive to stabilise the SDRplay once the PC has been on for about 10 minutes. ..thus hopefully preventing SDRplay vxo drift of huge proportion once the pcs internal temerature reaches optimum. What I can say is that imo the largest problem of the 2 was indeed the LNB ..and that PLL IS important to this particular experiment. rgds VS[ATTACH=full]92086[/ATTACH] [ATTACH=full]92087[/ATTACH] [ATTACH=full]92088[/ATTACH] [ATTACH=full]92089[/ATTACH] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Miscellaneous Sections
Tech Head - The Technology Section
SDR radio, Software Defined Radio
The Aero Thread..
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top
