NavCom LAND-PAK Rev.E - Manual (Page 59)

LAND-PAK
™ User Guide – Rev. E
4-57
Channel Spacing
The data speed of the radio interface depends on the
chosen radio channel spacing. Channel spacing is
fixed at 25 KHz in software v2.1.7.
Software v3.0 and
later allows 12.5 or 25 KHz.
Data Speed
If the data speeds of the radio interface and the serial
interface differ, the radio modem temporarily buffers
data being transferred, so no data loss occurs.
A channel spacing of 25 KHz enables a data speed of
19200 bps. Channel spacing of 12.5 KHz enable a
data speed of 9600 bps. The TrimTalk protocol limits
the data rate to 4800bps. However, these rates are
not programmable in the SF-3040.The data speed of
the radio interface is always fixed (19200 bps),
regardless of the data speed of the serial interface.
Transmitter
The transmitter output power is adjustable: It can be
set at 100, 200, 500, or 1000 mW (1 W). To conserve
battery life, the transmitter output power should be set
to the lowest possible level that ensures error-free
connections under variable conditions.
Table 8: Transmission Output Power Values,
Watts vs. dBm
Output Power dBm
100 mW +20
200 mW +23
500 mW +27
1 W +30