Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 343)

343 Appendix H Technical Reference Manual-4.0.0en
Highlight the reference station you
wish to use. CONT (F1) returns to the
previous panel. The number of the
selected reference station is taken
over into the Ref Stn Id line.
Note that setting Ref Stn Ids is only
possible without a survey or stakeout
operation running.
Repeaters and Repeater Box
Firmware 3.00 and higher supports
the use of repeaters.
A repeater is a radio, which is set up
for repeater mode. A repeater
receives data from the reference and
broadcasts the data further to the
rover. Consequently, the range
increases. The total range depends
on the set up of reference, repeater
and rover.
With User defined you may press
SCAN (F5) to access a list of refer-
ence stations transmitting on the
particular channel. The list shows the
reference station IDs, the RTK format
used for transmitting and the latency
(time delay) with which the messages
are sent. This SCAN functionality is
independant from time slicing and
can therefore always be used to
check the RTK format of the refer-
ence.
Since not all radio modems are
suitable as repeaters, we recommend
the Satelline 3AS(d) and all Pacific
Crest RFM96 and PDL Models.
A radio, which is programmed as a
repeater, can still be used for refer-
ence and rover applications. How-
ever, this is not recommended for
power consumption reasons.
It is important that all radio modems
at reference, repeater and rover
operate on the same frequency. For a
channel switch, the repeater requires
connection to the sensor.
The GHT38 is a repeater box for the
Leica housings for radio modems. By
using this box, the housings can be
fixed to a tripod. The power supply for
the modem is enabled with an exter-
nal battery and a power cable.
For more information on how to set
up a repeater with a repeater box see
section 2.13.