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[Discuss-gnuradio] Regarding correlate access code-tag block not working

From: Maitry Raval
Subject: [Discuss-gnuradio] Regarding correlate access code-tag block not working
Date: Tue, 8 Jan 2019 10:49:24 +0530 (IST)


Please find attached screenshot of GNU flow graph for CCSDS TM transmitter and receiver, in which I have used correlate access code-tag block in order to trigger at CCSDS sync bits and produce tags which is followed by custom block from gr-satellites fixed length packet tagger block in order to extract that sync bits from payload and provide payload file in file sink.

But, the issue is that correlate access code-tag block is not working and producing tags, so that my output file will come blank. as  I am certain that at the output of FEC extended decoder, both the sync bits and payload is available which I have seen by attaching file sink at the output of FEC extended decoder.

that means, there may be an issue to correlate access code-tag block. Can anyone please guide me where am I doing wrong? I have also tried by attaching time sink at the output of correlate access code-tag block and by right clicking the time domain spectrum and selecting trigger-mode-tag , but after executing, following is the message. but not trigger at the tag.
Generating: 'C:\\Users\\maitry.raval\\Desktop\\top_block.py'

Executing: C:\Program Files\GNURadio-3.7\gr-python27\python.exe -u C:\Users\maitry.raval\Desktop\top_block.py

DEBUG: Access code: 1acffc1d
DEBUG: Mask: ffffffff
gr::pagesize: no info; setting pagesize = 4096

I have GNU radio version: in windows OS.

With Best Regards,
Maitry Raval,

Attachment: file transfer with FEC,ASM attach, mod-demod.grc.png
Description: PNG image

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