CHINOWING V Series Poor Video Link Signal User Guide
- July 9, 2024
- CHINOWING
Table of Contents
CHINOWING V Series Poor Video Link Signal
Product Information
Specifications:
- Ground Antenna Installation: Maximum height for stability
- Air Antenna Installation: Avoid blockage by fuselage or wings
- RF Values for Testing: Adjust to [-20~-40] on both air and ground units
- IP Addresses: Air – 192.168.168.12, Ground – 192.168.168.11
Product Usage Instructions
Troubleshooting Poor Video Link Signal:
- Antenna and Cable Check: Ensure proper installation and no damage.
- Obstacle Assessment: Identify obstacles between units.
- Parameter Verification: Check settings.
- Interference Evaluation: Check for interference.
Antenna Installation Guidelines:
- Ground Antennas: Install at maximum height.
- Air Antennas: Avoid blockage by fuselage or wings.
Pre-Troubleshooting Preparation:
Review DRPR Log for insights. Set RF values to [-20~-40] on both units.
Accessing DRPR Logs and Setting RF Values:
- Visit IP Address: Enter the designated IP in the browser.
- Log In: Visit as Management Login and set RF values.
Analyzing DRPR Log:
- Focus on: RSRP, SNR, and DISTANCE
- Troubleshooting SNR Discrepancies: Address based on differences.
FAQ
-
How to address high absolute differences in SNR?
If there is a high absolute difference, check antenna installation or feeder line issues. Adjust antenna direction or consider replacements if needed. -
What does SNR value indicate?
The SNR value indicates signal quality. A higher SNR value signifies better signal quality.
Essential Steps
- Antenna and Cable Check: Ensure antennas and cables are properly installed and not damaged.
- Obstacle Assessment: Identify any obstacles between ground and air units during testing.
- Parameter Verification: Review and check parameter settings are correct.
- Interference Evaluation: Determine if interference is present in the testing area.
Antenna Installation Guidelines
- Ground Antennas: Install at maximum height for stability.
- Air Antennas: Avoid blockage by fuselage or wings.
Pre-Troubleshooting Preparation
Review DRPR Log for insights during flight testing. Simulate testing environment by adjusting RF values to [-20~-40] on both air and ground units.
Accessing DRPR Logs and Setting RF Values:
-
a. Visit the IP Address: Enter the designated IP address in your web browser’s address bar.
V series IP address
Air: 192.168.168.12
Ground: 192.168.168.11 -
b. Log In: visit as Management Login.
And then enter the RF value setting interface. For more setting instructions, pls refer to Support- User Manual-.
Analyzing DRPR Log
Key Data Sections: Focus on RSRP, SNR, and DISTANCE
SNR (signal-to-noise ratio) shows the current signal quality. The bigger
the SNR value is, the better the signal quality.
Take the picture below as an example: SNR > 19 section means the best signal.
Troubleshooting SNR Discrepancies: Address antenna or feeder line issues based on SNR differences.
- High absolute difference (> 7) between two SNRs suggests potential antenna installation or feeder line issues, particularly on the side with the smaller SNR.
- Adjust the direction for one antenna and observe changes in the DRPR log. If no improvement, inspect feeder lines or consider replacements.
Example 1
Referring to the provided images, it’s evident that there are issues with the
SecondAntenna side based on the Center Node DRPR Log.
Example 2
In the Access Node DRPR Log, both antenna SNRs are below 7, indicating poor
signal quality from both antennas. Meanwhile, in the Center Node DRPR Log, the
SNR for the Main antenna is also below 7, with an absolute difference of over
10 between the two SNRs. This suggests issues with the Main Antenna for the
center node, necessitating adjustments and corrective actions, such as
changing the antenna angle while monitoring DRPR log changes. This systematic
troubleshooting approach allows for the identification and resolution of
antenna and feeder line issues for both center nodes and access nodes, step by
step.
Interference Detection: Use the Background Noise formula to assess environmental interference.
- Once the antennas and feeder lines are confirmed to be in good working condition, the next step is to assess the flying environment for potential interference.
- Start by checking if the SNR is less than 15. If it is not, consider adjusting the distance between the ground unit and the air unit, or reducing the RF power.
- To determine if there is environmental interference, use the formula: Background Noise =RSRP – SNR
- No environmental interference is present when the Background Noise is less than -118
Notes
- a. The noise primarily originates from the surrounding flying area, but it could also stem from the antenna circuit or other devices such as screens, FPC, high-speed data cables, power supplies, and so on.
- b. It’s important to reset the devices to factory default settings if there are any special configurations during testing, to ensure they do not impact their actual usage.
Example 3:
Based on the Center Node DRPR Log image provided, the Background Noise Value
for the Main Antenna is -120, while for the Second Antenna it’s -118. This
indicates the absence of environmental interference. However, environmental
interference is detected for the access node, as indicated by the Access Node
DRPR Log.
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