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Calculate message transmission time

This topic has 1 reply, 2 voices, and was last updated 1 year, 3 months ago by Renzo Mischianti.

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- 8 August 2023 at 02:10 #26943
  george_santiago
  Participant
  1) What is the best technique to calculate message transmission time?
  
  2) Is it possible to calculate the transmission time using a 100 Mhz Oscilloscope, with the probe in the antenna connector? Or is it only possible to calculate the transmission time using a Spector Analyzer?
  
  3) Which E220 settings directly impact message transmission time? Just the SpeedAirDataRate?
  
  4) I need this information to try to identify the transmission time of a message sent by the E220, with the following characteristics:
  
  E220 – 920 Mhz Channel
  SpeedAirDataRate : 0 -> 9.6k (AIR_DATA_RATE_100_96)
  OptionSubPacketSett: 1 -> 32 bytes (SPS_032_11)
  Message Size: 15 bytes
  and Message Size: 20 bytes
  
  This information is important, as there are countries that only allow transmissions lasting up to 400 milliseconds.
  - This topic was modified 1 year, 3 months ago by george_santiago.
- 10 August 2023 at 14:12 #27108
  Renzo Mischianti
  Keymaster
  Hi George,
  I think the way to calculate that is to connect a logic analyzer and check the serial input and response time (change AUX state).
  The baud rate, SpeedAirDataRate, and also the LBT that is monitoring the ambient noise and can delay the sending of the message.
  Bye Renzo
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