Jerry, What sampling rate are you using on the D44?
Also, what do you set your DSP buffer size to? -Tim ---- Integrated Technical Services www.itsco.com "Si fractum non sit, id reficere" -Unknown Roman consultant -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gerald Capodieci Sent: Sunday, December 17, 2006 6:34 PM To: flexradio@flex-radio.biz; [EMAIL PROTECTED] Subject: [Flexradio] AGC and Other Optomized Receiver Settings I. M-Audio Software Changes 1. DMA buffer to 1024 2. Codec Sample Rate: Uncheck the "Rate Locked" box and the "Reset Rate When Idle" box. 3. Variable Signal Levels: Outputs= -10dBv, Ins1= +4, Ins2= +4, Ins3= -10 In upper left hand corner of the PowerSDR main screen click the 'Setup" option. II. Audio Tab PowerSDR Software: Buffer = 1024 III. DSP Tab V. Options Tab: 1. NR: Taps = 90, Delay = 20, Gain = 50, Block LMS is checked 2. Buffer Size = 1024, Window = Hanning, Noise Blanker = 20, Noise Blanker 2 = 14 VI. AGC Changes 1. Go back to the AGC Button on Main Screen set to "Custom" and the Preamp = "Med", Audio ~ 75 2. Click the Setup tab on the main screen followed by the DSP tab. 3. Then Click 'AGC/ALC" tab, set Slope(db) = 3, MaxGain~ 75 (this also changes the gain on Main Screen), Attack= 4, Decay = 10, Hang= 140, Hang Threshold= all the way to the left. VIII. Optional Filter Settings Suggest below matrix of settings I suggest an an arbitrary button-labeling convention to indicate its underlying settings. The first number is the band pass width; the second is the low cutoff. Example: [ 4 .1 ] has a band pass of 4 KHz and a low cut off of 100 Hz. 1. On the main screen, lower right, right click any one of the filters buttons and select "Configure". This brings up a screen that allows the individual filters to be reconfigured. Adjust the High and the Low cutoffs, the Width (band pass) on the bottom will adjust it self. CAUTION: the database can take only a limited number of settings at once, perhaps 10. Then it locks showing a memory exception causing all previous settings to be lost. To prevent the loss, Exit the software completely periodically to automatically save current work 2. I'm using the following matrix of filter settings: [4 .3] [4 .2] [4 .1] [3 .3] [3 .2] [3 .1] [2 .3] [2 .2] [2 .1] [1.7 .3] [VAR] [1.7 .1] I start with [3 .2] and select around till I find a best fit. Under very high noise conditions such as today, 16Dec2006, during a high sunspot condition [2. .3] seems to be most readable. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/flexradio_flex-radio.biz/attachments/20061217/397953fd/attach ment.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 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
