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The final byte of the sync (0x2A) along with it's start and stop bits are discarded as part of the processing.
Landis+Gyr GridStream Protocol (view source)
Revision as of 15:34, 14 January 2023
, 15:34, 14 January 2023→Sync and Header: Added GNURadio v4/v5 sync data
|[11] '''11111111''' 1
|}
----Using GNU Radio it was found that shortening the Sync requirements a bit and incorporating part of the header leads to the cleanest data for further downstream processing. The modified sync shown in 8 bit chunks is shown below. These two sync's are both loaded into the '''PDU Align''' block and if either one is matched the full packet is passed downstream.
{| class="wikitable"
|+Sync Word used with GNURadiofor v4
!0xAA
!0xAA
!0x00
!0x5F
!0xF
|-
|10101010
|10101010
|00000000
|01011111
|1111
|}
{| class="wikitable"
|+Sync Word used with GNURadio for v5
!0xAA
!0xAA
!0xA00x00!0x050x7F!0xFF0x1F
|-
|10101010
|10101010
|1010101000000000|1010101001111111|10100000|00000101|1111111111111
|}
----<br />
====Type, Length and Sub Type====
