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authorPau Espin Pedrol <pespin@sysmocom.de>2019-12-20 23:31:05 +0100
committerPau Espin Pedrol <pespin@sysmocom.de>2020-01-07 16:04:04 +0100
commite947db8d98fc873b06e7b42abc51f0109810e640 (patch)
tree49d1537670e1a4b56adf410efb21f0c77a7c5991
parent9279e0e12303fb91c351075c74e4dab5dc2251a7 (diff)
doc: clarify number of channels on B210 with multi-arfcn enabled
-rw-r--r--doc/manuals/chapters/configuration.adoc9
1 files changed, 5 insertions, 4 deletions
diff --git a/doc/manuals/chapters/configuration.adoc b/doc/manuals/chapters/configuration.adoc
index 2f4986f..a194537 100644
--- a/doc/manuals/chapters/configuration.adoc
+++ b/doc/manuals/chapters/configuration.adoc
@@ -46,15 +46,16 @@ Multi-ARFCN support is available since osmo-trx release `0.2.0`, and it was
added specifically in commit `76764278169d252980853251daeb9f1ba0c246e1`.
This feature is useful for instance if you want to run more than 1 TRX with an
-Ettus B200 device, or 2 TRX with an Ettus B210 device, since they support only 1
-and 2 physical RF channels respectively. No device from other providers or even
-other devices than B200 and B210 from Ettus are known to support this feature.
+Ettus B200 device, or more than 2 TRXs with an Ettus B210 device, since they
+support only 1 and 2 physical RF channels respectively. No device from other
+providers or even other devices than B200 and B210 from Ettus are known to
+support this feature.
With multi-ARFCN enabled, ARFCN spacing is fixed at 800 kHz or 4 GSM channels.
So if TRX-0 is set to ARFCN 51, TRX-1 _must_ be set to 55, and so on. Up to
three ARFCN's is supported for multi-TRX.
-From BTS and BSC point of view, supporting multiple TRX through multi-ARFCN
+From BTS and BSC point of view, supporting multiple TRXs through multi-ARFCN
feature in OsmoTRX doesn't make any difference from a regular multi-TRX setup,
leaving apart of course the mentioned ARFCN limitations explained above and as a
consequence physical installation and operational differences.