Garmin GPSCOM 190 - Manual (Page 75)

R e f e r e n c e
DGP5 Interface
Setup
ZHTERFñCE
RTCil/NMEfi
NtlEñ 0183 2.0
^800 baud
EEñCDH REOEIUER
FREC: IQD.DKH s
RHTE: SSbpf
DIST
SMR _.4R
No Status
130.75 ilS.00
DGP5 Interface
Once an RTCM interface
option is selected, must
míinuaíly tune the beacon
receiver from the frequency
field.
accepted on RTCM-104 v.
2.0 format. The GABMIN
GBR 21 is the recommend­
ed beacon receiver jor use
with the GPSCOM 190.
Other receivers with the
correct RICM format may
he used, hut may not cor­
rectly display status or
allow tuning control.
Once a NMEA setting has been selected (with or
without RTCM input), the NMEA setting of 0183 version
2.0 with a baud rate of 4800 will automatically appear
and is not selectable.
DGFS Interface Setup
The two RTCM settings allow the GPSCOM 190 to
accept DGPS corrections in RTCM 104 version 2.0 for­
mat. The RTCM/NONE format will allow you to connect
any manually-tuned beacon receiver to the proper inter­
lace, with the baud rate selectable from the GPSCOM
190. The RTCM/NMEA selection controls the GARMIN
GBR-21 beacon receiver.
Once a RTCM setting has been selected, the
GPSCOM 190 will automatically try to tune the last fre­
quency and bit rate selected, or it will switch to the
default frequency of 304,0 kHz with a bit rate of 100 bps
if no previous beacon has been tuned. You may also enter
your own frequency and bit rate if desired.
To enter a DGPS beacon frequency:
1. Highlight the 'FREQ' field,
2. Enter the desired frequency and press
3. Highlight the 'RATE' field and press
4. Select the rate and press
When the GPSCOM 190 is receiving DGPS correc­
tions, the ‘beacon receiver’ section of the I/O setup page
will display the frequency and signal strength, as well as
the distance from the transmitter to the beacon receiver.
A status message will constantly keep you informed of
DGPS activity:
* A ‘tuning’ message will be displayed while a beacon
signal is being tuned. Once the signal has been
tuned, the message ‘receiving’ will be displayed,
■ If a signal is tuned and no corrections are being
received, a ‘no data’ message will be displayed.
• If a beacon signal cannot be tuned, a ‘no status’
message will be displayed.