From e947db8d98fc873b06e7b42abc51f0109810e640 Mon Sep 17 00:00:00 2001 From: Pau Espin Pedrol Date: Fri, 20 Dec 2019 23:31:05 +0100 Subject: doc: clarify number of channels on B210 with multi-arfcn enabled Change-Id: I082d4d8c346f1be1569fe63baa856029e439cb2c --- doc/manuals/chapters/configuration.adoc | 9 +++++---- 1 file 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. -- cgit v1.2.3