Icom IC-7760 Operating Manual page 29

C. Using CW Skimmer with HDSDR (For a narrow 24 kHz bandwidth)
D Troubleshooting
If the straight line as shown to the right is displayed on
CW Skimmer, adjust the IQ-Gain setting on HDSDR.
The straight line is displayed because of a sharp spike
(a DC), if the noise floor is too low.
L The IQ-Gain setting is displayed by <Options> and set
"Output Channel Mode for RX" to
"IF as I (Left) / Q (Right)." (pp. 8, 13, 18, 24)
TIP: When adjusting the IQ-Gain setting
• The IQ-Gain should not be too high. After the straight line has disappeared, do not set the gain higher than that level.
• If the IQ-Gain is too high, CW Skimmer becomes easily saturated when receiving a strong signal. If CW Skimmer is
saturated, lower the IQ-Gain or lower the input level on the IC-7760.
- Turn OFF the Preamplifier.
- Turn ON the Attenuator function.
- Lower the RF gain.
- Turn ON the Digital Selector function.
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