diff options
| author | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2021-01-11 01:03:20 +0100 |
|---|---|---|
| committer | Vadim Yanitskiy <vyanitskiy@sysmocom.de> | 2021-01-19 17:47:09 +0100 |
| commit | b726afe50826daa4fd54510d96f57baf6f35c03a (patch) | |
| tree | 4322bdbefc346d1a294d8c09518055f791c3c77f | |
| parent | fef1710137325bd20d16a491503c58264f170722 (diff) | |
TRXD: clarify the meaning of field 'PWR' in Downlink messages
| -rw-r--r-- | common/chapters/trx_if.adoc | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/common/chapters/trx_if.adoc b/common/chapters/trx_if.adoc index 02633ab..cf2687d 100644 --- a/common/chapters/trx_if.adoc +++ b/common/chapters/trx_if.adoc @@ -516,8 +516,9 @@ FN: 32 bits (4 bytes):: GSM frame number, big endian. PWR: 8 bits (1 byte):: -Contains the relative (to the full-scale amplitude) transmit power level in dB. -The absolute value is set on the control interface. +Contains the relative (to the full-scale amplitude) transmit power *reduction* +in dB. The absolute value is set on the control interface, so the resulting +power is calculated as follows: `full_scale - (absolute_red + relative_red)`. Hard-bits: 148 bytes for GSM, 444 bytes for EDGE:: Contains the downlink burst. Each hard-bit (1 or 0) of the burst is represented |