FlyDog SDR

# Common Troubleshootings

Depending on the problems users may encounter when using the device, some basic troubleshooting methods are provided here.

# Unable to Connect

Description: The router can see the hostname of the FlyDog SDR (flydog-sdr.lan) in the background, but when accessing the corresponding IP, it prompts that the connection is denied or the connection timeout.

Possible Cause:

  • First boot of the system, slightly slow
  • System corruption
  • SD card not fast enough
  • Insufficient power supply current
  • The router hadn't updated the DHCP client list instantly after rebooting FlyDog SDR

Solution:

  • Wait for a while and then visit again
  • Go to github.com/flydog-sdr/raspbian-builder/releases (opens new window) to download and flash the latest distribution
  • Replace the Micro SD card with a Class 10 card with a capacity of 8GB or more
  • Use the official Raspberry Pi power supply or a power supply with a higher full load current
  • Access the FlyDog SDR directly using the hostname or reboot the router

# Device Drops Out

Description: The device drops out for no apparent reason after a period of operation and needs to be re-powered before it returns to normal.

Possible Cause:

  • Insufficient power supply current
  • Aging of the power cable
  • Poor contact with the power socket

Solution:

  • Use the official Raspberry Pi power supply or a power supply with a higher full load current
  • Replace with a good quality Micro-USB, USB Type-C power cable
  • Replace the power socket

# Very Slow Webpage Loading

Description: After several quick refreshes of the FlyDog SDR webpage, the webpage loading speed suddenly becomes extremely slow.

Possible Cause:

  • You are being rate limited

Solution:

  • Close the current tab and wait a few seconds before revisiting

# Can't Receive GPS Signal

Description: The FlyDog SDR expansion board is connected to the GPS antenna, but still cannot locate and calibrate the frequency.

Possible Cause:

  • GPS antenna is damaged
  • FlyDog SDR uses Navstar, QZSS, Galileo satellites for positioning and the signal is weak

Solution:

  • Replace the GPS antenna
  • Place the GPS antenna in an open area

# Intermittent Bursts of Sound

Description: Intermittent bursts of sound when receiving certain stations.

Possible Cause:

  • Short signal overload due to fluctuating signals from shortwave stations
  • AGC-related options are incorrectly set

Solution:

  • Enable the Synchronous Aperture Detection (SAM) function on the dashboard or connect the antenna to HF-1 interface
  • Adjust the AGC-related options in the dashboard until no popping occurs

# Spectrogram is Black

Description: The webpage opens, but the spectrum graph is black and there is no sound, and the Status tab in the dashboard does not output statistics.

Possible Cause:

  • External ADC clock is mistakenly enabled
  • FlyDog SDR failed to initialise the FPGA
  • The FPGA chip has been damaged

Solution:

  • Set External ADC clock to No in the Connect tab in the administration
  • Try to reboot the device by unplugging the power supply
  • Contact the dealer for repair of the FlyDog SDR expansion board

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