[Flexradio] Receiver sensitivity of the SDR1000
Hi. I am a complete newby to SDR, and am considering purchasing an SDR1000. When reading the specifications, I have noticed that the MDS is -130 dBM, which seems to pale in comparison to other popular rigs such as the IC756proIII, Orion2 and K2. For anyone who has used these other rigs, do the numbers translate into a real disadvantage in sensitivity, or they just numbers? Also- is receiver MDS something that can be improved with later editions of software? Many thanks and 73 Steve WA2DTW No need to miss a message. Get email on-the-go with Yahoo! Mail for Mobile. Get started. http://mobile.yahoo.com/mail -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070218/9fbe9c02/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Receiver sensitivity was "deaf receiver"
I had a situation in my early SDR where the diode protection across the preamp was not present. I managed to blow out the preamp from a strong RF field in my multi transmitter station. My RX was deaf to say the least. The fix was easy put in a new amp and add the diodes. So check to see if the diode protection is present. My other SDR had the diodes and exposure to similar RF fields has caused no problem 73 W9OY Yahoo! Music Unlimited Access over 1 million songs. http://music.yahoo.com/unlimited ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Receiver sensitivity was "deaf receiver"
Ross, It should be -107 dBm. Mine fluctuates around -107 to -108. Bob K5KDN -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Ross Sent: Friday, February 02, 2007 7:58 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] Receiver sensitivity was "deaf receiver" I appear to have made the 1 watt receiver operate. Can someone tell me please, using the 1microvolt output on an XG1 what db reading one could expect at the moment using the panadaptor on avg, the signal peak is 32db above the noise. what sensitivity should I be looking for. Thanks and best wishes to all Flexers Ross ZL1WN -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20 070203/c5331b2e/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Receiver sensitivity was "deaf receiver"
Sorry Ross, I have my SDR disassembled at the moment. Can not tell you good luck 73 peter pa0pvn groeten Peter petervn(a)hetnet.nl <mailto:[EMAIL PROTECTED]> ; pa0pvn(a)hetnet.nl <mailto:[EMAIL PROTECTED]> ; pa0pvn(a)gmail.com ; pa0pvn(a)amsat.org . Van: [EMAIL PROTECTED] namens Ross Verzonden: za 3-2-2007 2:57 Aan: FlexRadio@flex-radio.biz Onderwerp: [Flexradio] Receiver sensitivity was "deaf receiver" I appear to have made the 1 watt receiver operate. Can someone tell me please, using the 1microvolt output on an XG1 what db reading one could expect at the moment using the panadaptor on avg, the signal peak is 32db above the noise. what sensitivity should I be looking for. Thanks and best wishes to all Flexers Ross ZL1WN -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070203/c5331b2e/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070203/4ef067bc/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Receiver sensitivity was "deaf receiver"
I appear to have made the 1 watt receiver operate. Can someone tell me please, using the 1microvolt output on an XG1 what db reading one could expect at the moment using the panadaptor on avg, the signal peak is 32db above the noise. what sensitivity should I be looking for. Thanks and best wishes to all Flexers Ross ZL1WN -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070203/c5331b2e/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Receiver Sensitivity
Bob, Depending on the signal source, you may not hear an audible difference between the various Preamp modes because the AGC is normalizing the audio to roughly the same levels. Note that the software compensates for the various Preamp modes by adjusting the display and s-meter in order to accurately reflect the signal as seen by the antenna. Generally, the best way to test receiver sensitivity is to do a level calibration (requires a known level signal source) and then check the signal level at 14.0MHz in 500Hz with no signal present, Preamp on High. Depending on which preamplifier you are using, you should get something in the -130 to -127 range. If you see something much higher than that, let us know. Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Sunday, September 25, 2005 1:04 PM To: FlexRadio@flex-radio.biz Subject: [Flexradio] Receiver Sensitivity Is there a simple way to confirm receiver sensitivity? My receiver front end seems to have lost sensitivity; I don't hear any change when switching Preamp from "Off" to "Low." There is a slight change from "off" to "Med." There is an very slight increase from "Med" to "High." However, "High" is down significantly from comparison with my FT-1000D (about 3-4 S units). The difference many times between hearing and not hearing. It's been my habit to disconnect the antenna when not using the radio. To trouble shoot, I've changed the entire antenna input (changes coax and switches / exchanged connections with the FT-1000D) line-up to the SDR with no change. My guess is the receiver front end (Preamp) is out. Using PowerSDR V1.4.5, Computer - Gateway 3.2 GHz with Delta-44 Thanks, Bob K8MLM
Re: [Flexradio] Receiver Sensitivity
The High Preamp initialization was an issue before the Beta 1.4.5 Preview 1. This should not be an issue going forward. Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Sunday, September 25, 2005 2:11 PM To: [EMAIL PROTECTED]; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] Receiver Sensitivity John, I Tried different versions of PowerSDR... no difference in receiver sensitivity. SDR runs several S-units behind the FT-1000D. Now that I think back several weeks ago, when turning on the SDR, if the Preamp was in the "High" position, I had to first turn it to the "Mid" or lower position before I would hear anything from the radio. I thought it was a software thing... It doesn't do it now. Bob In a message dated 9/25/2005 2:38:04 P.M. Eastern Daylight Time, W5gi writes: 2 Things try a different version of Power SDR and A/B with FT1000. The SDR should to equal to or better than the Yaesu. I won't be on this afternoon due to a cocktail party from 4-6. 73, John
Re: [Flexradio] Receiver Sensitivity
Bob, I can confirm Willi's advice. I had the same problem. My solution was the USB to PIO adapter. You may possibly try to increase the LPT delay, if you don't want to use the adapter. 73, Ahti OH2RZ - Original Message - From: Willi Reppel To: [EMAIL PROTECTED] ; [EMAIL PROTECTED] ; FlexRadio@flex-radio.biz Sent: Monday, September 26, 2005 12:27 AM Subject: Re: [Flexradio] Receiver Sensitivity Hi Bob, I had once problems with reduced sensivity. Make sure that you can hear a distinct relay click each time when you step through the positions of the preamplifier from off to high gain and back. Missing relay clicks indicate that you may have a problem with the parallel port connection. Best 73 de SM6OMH Willi - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] ; FlexRadio@flex-radio.biz Sent: Sunday, September 25, 2005 9:11 PM Subject: Re: [Flexradio] Receiver Sensitivity
Re: [Flexradio] Receiver Sensitivity
Hi Bob, I had once problems with reduced sensivity. Make sure that you can hear a distinct relay click each time when you step through the positions of the preamplifier from off to high gain and back. Missing relay clicks indicate that you may have a problem with the parallel port connection. Best 73 de SM6OMH Willi - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] ; FlexRadio@flex-radio.biz Sent: Sunday, September 25, 2005 9:11 PM Subject: Re: [Flexradio] Receiver Sensitivity John, I Tried different versions of PowerSDR... no difference in receiver sensitivity. SDR runs several S-units behind the FT-1000D. Now that I think back several weeks ago, when turning on the SDR, if the Preamp was in the "High" position, I had to first turn it to the "Mid" or lower position before I would hear anything from the radio. I thought it was a software thing... It doesn't do it now. Bob In a message dated 9/25/2005 2:38:04 P.M. Eastern Daylight Time, W5gi writes: 2 Things try a different version of Power SDR and A/B with FT1000. The SDR should to equal to or better than the Yaesu. I won't be on this afternoon due to a cocktail party from 4-6. 73, John ___FlexRadio mailing listFlexRadio@flex-radio.bizhttp://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Receiver Sensitivity
John, I Tried different versions of PowerSDR... no difference in receiver sensitivity. SDR runs several S-units behind the FT-1000D. Now that I think back several weeks ago, when turning on the SDR, if the Preamp was in the "High" position, I had to first turn it to the "Mid" or lower position before I would hear anything from the radio. I thought it was a software thing... It doesn't do it now. Bob In a message dated 9/25/2005 2:38:04 P.M. Eastern Daylight Time, W5gi writes: 2 Things try a different version of Power SDR and A/B with FT1000. The SDR should to equal to or better than the Yaesu. I won't be on this afternoon due to a cocktail party from 4-6. 73, John
[Flexradio] Receiver Sensitivity
Is there a simple way to confirm receiver sensitivity? My receiver front end seems to have lost sensitivity; I don't hear any change when switching Preamp from "Off" to "Low." There is a slight change from "off" to "Med." There is an very slight increase from "Med" to "High." However, "High" is down significantly from comparison with my FT-1000D (about 3-4 S units). The difference many times between hearing and not hearing. It's been my habit to disconnect the antenna when not using the radio. To trouble shoot, I've changed the entire antenna input (changes coax and switches / exchanged connections with the FT-1000D) line-up to the SDR with no change. My guess is the receiver front end (Preamp) is out. Using PowerSDR V1.4.5, Computer - Gateway 3.2 GHz with Delta-44 Thanks, Bob K8MLM
