Icom IC-R8600 About The Hdsdr Software Operations - Page 5
To remove a sharp spike when setting a low sampling rate value, To adjust the IQ balance, RF Gain
View all Icom IC-R8600 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 5 highlights
To remove a sharp spike when setting a low sampling rate value If the sampling rate value is too low, a sharp spike (a DC) is displayed at the LO frequency position. The DC is a constant offset in voltage, the Left and Right (I and Q) ADCs produce, due to error. a sharp spike (a DC) To remove the sharp spike: ••Set a higher sampling rate value. or ••Adjust the IQ balance. (Option [F7] ➔ Calibration Settings ➔ DC Removal Calibration for RX) To adjust the IQ balance 1. Set RF Gain to "MIN" on the IC-R8600 I/Q Settings screen. (p. 3) •• Only the sharp spike is displayed. 2. Open "DC Removal Calibration for RX." 3. Click the displayed mode to set "IIR-Highpass (Auto)." •• The software automatically adjusts the IQ balance. 4. Set Mode to "Constant (On)." LLIf this setting remains "IIR-Highpass (Auto)," the software removes signals near the LO frequency. 5. Adjust RF Gain on the IC-R8600 I/Q Settings screen. NOTE: When you change the sampling rate value, adjust the IQ balance again. 5 A7438-2EX © 2017 Icom Inc.