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d-star:data [2018/11/15 20:12]
f4hof [Mini header]
d-star:data [2018/11/15 20:19] (current)
f4hof
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 ====== Data frames in D-Star ====== ====== Data frames in D-Star ======
-====== Data Frames in D-Star ====== 
  
 ===== Mini header ===== ===== Mini header =====
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 Example of data configuration on the transmitting side / receiving side when transferring user's data communication by simple data communication Example of data configuration on the transmitting side / receiving side when transferring user's data communication by simple data communication
 +
 +<pic>
 +
 +===== Messaging function =====
 +
 +This function is used to send and receive 20-character messages to be displayed on the radio. It is specified as follows. The characters that can be used depending on the radio used.
 +
 +<pic>
 +
 +===== Header retransmission =====
 +
 +Header information retransmission
 +
 +It is possible to transmit by using a data frame in a state where error correction is not applied to information excluding bit synchronization and frame synchronization in radio section header information. In the case of transmission,​ it occupies nine frames of data frame after the [Sync] frame, (further in the case of transmitting the code squelch information,​ thereafter) and transmits one header information at a cycle of 420 ms.
 +
 +Note: Since the occupancy rate of the header information is high in the retransmission of the header information,​ there are cases where the retransmission of the header information is not performed in the case of performing simple data communication by the user or during the message transmission of the message function.
 +
 +===== Code Squelch =====
 +When using the digital code squelch (CSQL) feature, the following two-digit code is transmitted as a data frame. The code data is transmitted at a cycle of 420 ms using the data frame of two frames immediately after the [Sync] frame.
 +
d-star/data.txt ยท Last modified: 2018/11/15 20:19 by f4hof