SATELLINE-M3-TR3,
–
TR4 and -R4
Integration Guide, Version 3.0
56
SATELLINE-3AS mode (FEC OFF) on 25 kHz channel - Transfer delays
Bps
1 byte
10 bytes
100 bytes
500 bytes
1200
30 ms
30 ms
18 ms
16 ms
4800
23 ms
23 ms
21 ms
12 ms
9600
23 ms
23 ms
21 ms
17 ms
19200
22 ms
22 ms
22 ms
19 ms
38400
22 ms
22 ms
38 ms
102 ms
SATELLINE-3AS mode (FEC ON) on 25 kHz channel - Transfer delays
Bps
1 byte
10 bytes
100 bytes
500 bytes
1200
35 ms
34 ms
29 ms
30 ms
4800
28 ms
28ms
27 ms
23 ms
9600
28 ms
28 ms
28 ms
23 ms
19200
28 ms
28 ms
36 ms
64 ms
38400
27 ms
27 ms
58 ms
185 ms
In the PacCrest-4FSK, PacCrest-GMSK and Trimtalk450s modes the whole message is first read
from the serial port. The end of the message is detected when there is a pause in data. After that
data is framed and transmitted over the radio. Likewise the reception is done fully before
outputting the message to the serial port.
Symbol rates of the compatibility modes
The actual raw data rate is appr. 2/3 of the symbol rate.
Compatibility mode Symbol rate on 12.5 kHz channel
Symbol rate on 25 kHz channel
PacCrest 4FSK
9600 bps
19200 bps
PacCrest GMSK
4800 bps
9600 bps
Trimtalk450s
4800 bps
9600 bps
PacCrest FST
9600 bps
19200 bps
The typical latency vs. the size of a message is shown in the tables below for each radio
compatibility mode. The delays are measured from the end of transmitted data to the end of
received data on the serial interface.
Pacific Crest 4FSK mode on 12.5 kHz channel - Transfer delays
Bps
1 byte
10 bytes
100 bytes
500 bytes
9600
74 ms
82 ms
302 ms
1293 ms
19200
73 ms
77 ms
249 ms
1031 ms
38400
72 ms
74 ms
222 ms
900 ms