Overview
When uploading a recorded study to Nox Connect, the time it takes to complete the upload depends mainly on two factors:
The size of the study file
The upload speed of the internet connection
Other factors like network stability and computer performance can also have a minor impact, but file size and upload speed are the dominant ones.
Typical File Sizes
The size of a study file varies depending on the type of recording, number of channels, and duration of the study. The table below can be used as a guideline for typical file sizes depending on the recording configuration:
| Study Type | Typical File Size | Notes |
|---|---|---|
| PG (Polygraphy) | ~150–200 MB | Typical for home sleep testing with a standard set of signals |
| PSG (Polysomnography) | ~200–600 MB | Depends on number of channels and recording duration |
| In-lab Study (with Audio/Video) | Can exceed several GB | Audio and video data can significantly increase file size and upload time |
Larger files, especially those containing video or audio, will take considerably longer to upload
How Upload Time Is Calculated
Upload time can be estimated using the following formula:
Note: Internet speeds are measured in megabits per second (Mbps), while file sizes are measured in megabytes (MB). Since 1 byte = 8 bits, you divide by 8 to convert speed to MB/s.
Example Upload Times
Assuming a 1 GB (1024 MB) study file, the table below shows approximate upload times for different internet upload speeds:
| Upload Speed (Mbps) | Approx. Upload Time | Notes |
|---|---|---|
| 1 Mbps | ~2 hours 15 minutes | Typical for slow DSL connections |
| 5 Mbps | ~27 minutes | Moderate home connection |
| 10 Mbps | ~13 minutes 30 seconds | Average broadband |
| 20 Mbps | ~6 minutes 45 seconds | Fast broadband |
| 50 Mbps | ~2 minutes 45 seconds | High-speed fiber connection |
| 100 Mbps | ~1 minute 20 seconds | Very high-speed or business connection |
These times are approximate and assume a stable connection with no interruptions. Real-world results may vary.
Tips for Faster Uploads
Use a wired (Ethernet) connection if possible - it’s more stable than Wi-Fi.
Avoid other large uploads or video streaming on the same network during the upload.
Keep the computer awake until the upload completes.
If your connection is unstable, try uploading at a different time of day when network traffic is lower.
Problems using Wi-Fi can often be solved by restarting the wireless router.
In Summary
Upload time is mainly determined by the size of the study and your internet upload speed.
Larger studies or slower connections will take longer to upload.
The example table above can help estimate how long uploads will take based on your connection speed.
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