Phillip,
If I understand your question, you want to 'turn on' the recording upon receiving an "enable" stream tag. I would look at the following blocks or maybe use a simple Embedded Python block: https://wiki.gnuradio.org/index.php/Mute https://wiki.gnuradio.org/index.php/Burst_Tagger https://wiki.gnuradio.org/index.php/Power_Squelch https://wiki.gnuradio.org/index.php/Standard_Squelch Note: Mute outputs zeros when muted; the Selector outputs nothing when disabled. For additonal ideas, look at https://github.com/duggabe/gr-control Think outside the box. --- Barry Duggan KV4FV https://github.com/duggabe On Fri, 10 Dec 2021 03:42:26 +0000, Phillip Kwan wrote: Hello, I am new to GNU Radio and am wondering question in the subject is possible. In my application, I am transmitting a signal from a file source and need to record sections of that signal at periodic intervals into a file sink. However, I noticed that the E320 receives noise before the desired signal begins transmitting and results in noise being recorded at the beginning of the file. Is it possible to use a selector block to switch the output to the file sink path after receiving some "enable" stream tag in order not to record noise at the beginning? Any alternative solutions would also be appreciated. Thank you in advance. Regards, Phillip
