I did more testing. Has anyone monitored themselves on AM, FM, or DSB? Not the Panoramic display, not the Monitor button, but listening to themselves with another receiver?
I soldered a new "Y" cable for Line Outputs and tested with no change. Suspecting a problem with my Delta 44, I put a dual-trace scope on the Line Outputs 3 and 4. As expected, I could see the I and Q sound card outputs for USB and LSB when I spoke into the microphone, or used the tone generator built into the Shure M67. I tried DSB and there was NO output from the sound card! Even though it showed on the display on the PC screen. CW mode showed a signal. AM showed the carrier, but when I added modulation, the sound card outputs were steady carrier. In FM I could see the carrier, but it was rock-steady in frequency, even though I added modulation. I am relieved. This is in the software, not my SDR or cabling. I think that I noticed the same problem in Beta 1.3.12. Can anyone duplicate this problem? Mike AA8K Mike Naruta wrote:
I get modulation on the transmitted signal on SSB, but not on AM, FM, or DSB; just carrier. I can see the modulation on the PowerSDR Console, it looks beautiful in the Spectrum and Panadapter displays, but when I tune it in on my Kenwood TS-430S, I just hear carrier. Frequency 14.286 MHz. The receiver works very nicely; Frequency, Level, and Image Null calibration behaved well. I couldn't get the 100 Watt PA and ATU to calibrate (Calculated Gain Is Invalid); I think my modulation issue might be part of it. I removed the ATU and 100 Watt PA and I'm running directly out of the 1 Watt BNC, to a 1 Meter jumper, to a Bird Watt meter, to a 100 Watt load. I tried swapping my Line-Out and Line-In Y-cables with no effect. I tried some gentle upward pressure on the miniature phone plugs while transmitting just in case my plug was too small in diameter. My tip connections to the Delta 44 are Out 3 and In 1. They are Radio Shack gold Y's, but I used a continuity tester to check my wiring and used a knife to cut off the excess plastic molding on the sleeve of the miniature phone plug. I measured 13.8 Volts at the SDR-1000's binding posts. I'm stumped. Mike AA8K Here are my particulars: RFE, 100W PA (removed), ATU (removed) Power SDR Beta v1.3.8 Audio Buffer Size 2048 M Audio Delta 44 driver 5.10.00.0051 Settings for Delta 44 match the Delta 44 Quick Start Guide (Latency 512 Samples) No ASIO4ALL installed; native ASIO in Delta 44 driver. Microphone into a Shure M-67 mixer, T-R-S balanced output into In 3 of the Delta 44. Windows XP Professional Edition 2002 with Service Pack 2, all critical updates and Microsoft .Net 1.1 PC AMD Athlon 64, 2 GigaHertz, 512 MBytes RAM LPT1 with Flex-Radio cable
