RoyalTek REV-2000 - Manual (Page 16)

RoyalTek GPS Receiver REB-2000/REB-12R REV-2000 Operational Manual
12
cycle is 200ms/1000ms = 20%. If the “Update
Rate” is 2 sec and “On Time” is 300 ms, the
duty cycle is 300ms/2000ms = 15%. The duty
cycle is limited to 5% ~ 50%. Since it will do
some estimation in trickle power, please tune
the proper duty cycle that can compromise the
power consumption and acceptable navigation
performance. The “ricklePower Prameters”
dialog is shown as following picture.
To change TricklePower parameters
of REB-2100 from 12 pins interface.
Since it is NMEA output default, it needs to
change to SiRF protocol before change
TricklePower parameters. The procedure is
described as follows:
(1) Use “Set Serial Port” command of SiRF
NMEA input messages.
$PSRF100,0,9600,8,1,0*0C<CR><LF>
It will switch from NMEA to SiRF protocol.
(2) Use “Set Trickle Power Parameters -
Message I.D. 151” to set the trickle power
parameters.
(3) Use “Switch To NMEA Protocol –
Message I.D. 129” to switch back to
NMEA protocol.
To upgrade GPS engine board
program
(1) Turn off the power.
(2) Keep the BOOT jumper short.
(3) Turn on the power.
(4) Run the SiRFProg.exe.
(5) Select the Target Loader File. Select
dltarget.s for REB-12R2/R1. Select
dlgsp2.bin for REB-2100.
(6) Select the Target file that need to be
programmed into flash memory.