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7cfedb David Marsh 2026-04-16 04:47:29
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# Mid Testing
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90de3b David Marsh 2026-04-26 01:16:29
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Sydney is currently split into two distinct and incompatable[^bridges] radio settings.
7cfedb David Marsh 2026-04-16 04:47:29
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* **Narrow**: This is primarily used in the Northeast Sydney and Newcastle
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* **Wide**: This is used in Western Sydney, Southwest Sydney, and the Blue Mountains.
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There is a new setting that is being tested by several people dubbed "Mid".
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24256f David Marsh 2026-04-26 01:03:04
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| Name | MHz | BW | SF | CR |
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| --------- | -------:| -----:| --:| --:|
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| Mid | 915.075 | 125.0 | 9 | 5 |
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| MidNarrow | 915.075 | 62.5 | 7 | 8 |
7cfedb David Marsh 2026-04-16 04:47:29
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Problems that are trying to be solved:
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1. Sit at the bottom of the AU ISM Band and avoid conflicts with [LoRaWAN](https://www.thethingsnetwork.org/country/australia/) gear (which starts at 915.200 MHz).
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2. More speed benefits closer to Narrow; by increasing the Bandwidth
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3. Distance benefits of Wide; Western Sydney has a sparse node distribution with long distance links.
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4. Find common settings that the whole Sydney Mesh can agree upon to resolve the Wide/Narrow split.
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## Testing
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If you want to temporarily test these settings on a router:
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71c33c David Marsh 2026-04-26 00:59:21
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```
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tempradio {freq},{bw},{sf},{cr},{minutes}
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tempradio 915.075,125,9,5,120
fb6abe David Marsh 2026-04-26 01:00:20
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tempradio 915.075,62.5,7,8,1440
71c33c David Marsh 2026-04-26 00:59:21
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```
7016b4 David Marsh 2026-04-26 00:58:12
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7cfedb David Marsh 2026-04-16 04:47:29
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This changes a repeater to the mid settings for 120 mins. It will revert to the previously configured settings after 2 hours or if the repeater is rebooted.
4ee8ac David Marsh 2026-04-26 01:15:50
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90de3b David Marsh 2026-04-26 01:16:29
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[^bridges]: Bridges allow traffic across the boundries