[EAS] Sirius/XM on NPT

[Tim Stoffel]

I observed a delay of about six seconds on our ENDEC from when the red light on the front panel first came on  (which exactly coincided with the RX time logged), to when the first header block began to be sent. I wasn't exactly measuring this delay, so it could have been a little more or a little less.

Tim Stoffel

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-----Original Message-----
From: EAS [mailto:eas-bounces at radiolists.net] On Behalf Of Harold Price

Tim,

There is no "processing delay" per se.  For a CAP message with audio, like the NPT, there is a delay after the CAP message is received and logged and before transmit until the audio file is downloaded - your mileage may vary, my several test ENDECs took between one and three seconds to download the 224kb file.  It might be longer.  If it is too long, the ENDEC will do TTS instead.

For an analog alert, the incoming alert isn't logged until at least two of the three headers arrive, if you decode only header 1 and 3, that's longer.  An "automatic" action alert like the NPT won't start relaying until after the end of the incoming headers and the attention tone (but before the rest of the audio and EOM.  For the NPT, about 15 seconds.

Harold