Search found 658 matches

by glovisol
Sat Jul 27, 2019 4:04 pm
Forum: SDR Antennas
Topic: Receive Antenna & Impedance "Matching"
Replies: 114
Views: 18091

Re: Receive Antenna & Impedance "Matching"

CLARIFICATION ON SENSITIVITY PERFORMANCE COMPARISON RSP-1A VS. RSPduo & FOCUS ON NEGATIVE S/N 11. APPENDIX - Looking at WSPR reception @ 14 MHz from the perspective of RSP Processors 4-3 Noise meas. 14 MHz.jpg With the cited modification the Beverage antenna Noise Floor increased less than at the l...
by glovisol
Fri Jul 26, 2019 5:03 pm
Forum: General
Topic: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF
Replies: 19
Views: 3891

Re: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF

2.3. A DIGRESSION - NARROW BAND PRE-SELECTORS COMPUTER SIMULATION Uploaded below Figures 16 & 17 showing simulated performance @ 30 MHz. Figure 16 (under top title) shows the following parameters: CF- Center Frequency: 30 MHz Qu - Unloaded Q: 140 QL- Loaded Q: 40 IL - Insertion loss: 2.9 db L - Coi...
by glovisol
Fri Jul 26, 2019 4:57 pm
Forum: General
Topic: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF
Replies: 19
Views: 3891

Re: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF

2.3. A DIGRESSION - NARROW BAND PRE-SELECTORS COMPUTER SIMULATION Uploaded below Figures 14 & 15 showing simulated performance @ 20 MHz. This is an overlap, having switched from the 8-20 MHz to the 20-30 MHz band. Figure 14 (under top title) shows the following parameters: CF- Center Frequency: 20 ...
by glovisol
Fri Jul 26, 2019 6:23 am
Forum: General
Topic: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF
Replies: 19
Views: 3891

Re: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF

2.3. A DIGRESSION - NARROW BAND PRE-SELECTORS COMPUTER SIMULATION Uploaded below Figures 12 & 13 showing simulated performance @ 20 MHz. Figure 12 (under top title) shows the following parameters: CF- Center Frequency: 20 MHz Qu - Unloaded Q: 180 QL- Loaded Q: 40 IL - Insertion loss: 2.2 db L - Coi...
by glovisol
Fri Jul 26, 2019 6:16 am
Forum: General
Topic: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF
Replies: 19
Views: 3891

Re: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF

2.3. A DIGRESSION - NARROW BAND PRE-SELECTORS COMPUTER SIMULATION Uploaded below Figures 10 & 11 showing simulated performance @ 8 MHz. This is an overlap, having switched from the 4-8 MHz to the 8-20 MHz band. Figure 10 (under top title) shows the following parameters: CF- Center Frequency: 8 MHz ...
by glovisol
Thu Jul 25, 2019 8:17 pm
Forum: SDR Antennas
Topic: Receive Antenna & Impedance "Matching"
Replies: 114
Views: 18091

Re: Receive Antenna & Impedance "Matching"

CLARIFICATION ON SENSITIVITY PERFORMANCE COMPARISON RSP-1A VS. RSPduo & FOCUS ON NEGATIVE S/N 10. Conclusion The theory and practice of the performance analyses we have seen in the above titled series of posts can be found in these two basic studies available on this Forum: ASSESSING THE PERFORMANC...
by glovisol
Thu Jul 25, 2019 7:22 pm
Forum: SDR Antennas
Topic: Receive Antenna & Impedance "Matching"
Replies: 114
Views: 18091

Re: Receive Antenna & Impedance "Matching"

Dear Bill, I indeed welcome your tractation and I am glad to have found a Forum member founding his Antenna Noise analysis on the notorious ITU publication 372. I really would like you to examine my one year old work and Antenna measurement cycle based on the mentioned publication here: https://www....
by glovisol
Thu Jul 25, 2019 6:20 pm
Forum: SDR Antennas
Topic: Receive Antenna & Impedance "Matching"
Replies: 114
Views: 18091

Re: Receive Antenna & Impedance "Matching"

CLARIFICATION ON SENSITIVITY PERFORMANCE COMPARISON RSP-1A VS. RSPduo & FOCUS ON NEGATIVE S/N 9. Looking at WSPR reception @ 7 MHz from the perspective of RSP Processors - an example 3-3. Noise meas. 7.2 MHz.jpg This post is an explanation of the calculation/detection mechanics involved in very wea...
by glovisol
Thu Jul 25, 2019 3:44 pm
Forum: General
Topic: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF
Replies: 19
Views: 3891

Re: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF

2.3. A DIGRESSION - NARROW BAND PRE-SELECTORS COMPUTER SIMULATION Uploaded below Figures 8 & 9 showing simulated performance @ 8MHz. Figure 8 (under top title) shows the following parameters: CF- Center Frequency: 8 MHz Qu - Unloaded Q: 320 QL- Loaded Q: 50 IL - Insertion loss: 1.5 db L - Coil indu...
by glovisol
Wed Jul 24, 2019 5:55 pm
Forum: General
Topic: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF
Replies: 19
Views: 3891

Re: BUILDING SELECTIVITY PROTECTION INTO THE RSP FRONT END IN LF/HF

2.3. A DIGRESSION - NARROW BAND PRE-SELECTORS COMPUTER SIMULATION Uploaded below Figures 6 & 7 showing simulated performance @ 4 MHz. This is an overlap, having switched from the 2-4 MHz to the 4-8 MHz band. Figure 6 (under top title) shows the following parameters: CF- Center Frequency: 4 MHz Qu -...