Topcon SRL-35 - Transmission Delays When the Radio TX Frequency Is Changed; Transmission Delays When Using a 12.5 Khz Radio Channel; Transmission Delays Without FEC-Function (Forward Error Correction)

Appendix B
Transmission Related Delays
54
SRL-35 Operator’s Manual P/N: 1003224-01
Transmission Delays When the Radio TX Frequency is
Changed
• If the modem’s transmitter frequency (TX) is different than the receiver frequency (RX), there has to
be at least 40 ms delay from the Receive Data (RX) to Transmit Data (TX).
• If the transmitter frequency is changed by an SL-command, there has to be at least 40 ms delay after
the SL-command before the Transmit Data.
• If the transmitter frequency is changed from TX1 to TX2 by an SL-command during the transmission,
there has to be at least 40 ms delay after the SL-command before the Transmit Data.
Transmission Delays When Using a 12.5 kHz Radio
Channel
Transmission Delays without FEC-function (Forward Error Correction)
Delays are in milliseconds and with a 10% margin.
Figure 15: 12.5 kHz Radio Channel without Error Correction
Table 27. Number of Bytes Sent
Bps 1 10 100 500
1200
40 40 29 22
4800
34 34 31 22
9600
32 32 32 27
19200
32 35 64 193
38400
32 36 91 352