Javad Beacon, Руководство пользователя

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available the searching cycle is continued until one
reference station is found. The Master Beacon locks
to the first found reference station and starts RTCM
data demodulation while the Slave Beacon continues
searching in the background. If a synchronization loss
occurs on Master Beacon then it switches to the best
RTCM signal (which has the highest RSSI) from the list
of Beacon reference stations recorded by Slave Bea-
con.
The following are the Beacon reference station
searching criteria used in the algorithm of Automatic
scanning mode.
1.1. Frequency scanning criteria
• Full range scanning with 500 Hz step – full fre-
quency range is scanned with 500 Hz step (83 steps
in the range from 283.5 kHz to 325 kHz);
• Frequency map scanning – only the frequencies
defined in the frequency map are scanned.
1.2. Signal type scanning criteria
• All – On each step of frequency scanning all sig-
nal types are scanned (200bps, 100bps, 50bps)
• • 200 bps – only 200 bps signals are taken into ac-
count;
• 100 bps – only 100 bps signals are taken into ac-
count;
• 50 bps – only 50 bps signals are taken into ac-
count.
Note:
If in Automatic scanning mode the frequency channel
or signal type is selected (by LINK CHAN and LINK SIGTYPE com-
mands correspondingly) then the scanning mode is switched to
Manual by the firmware automatically.
2. Manual
In this mode operator specifies the frequency (in the
range from 283.5 kHz to 325 kHz) and signal type (200
bps, 100 bps or 50 bps) for Master Beacon to tune. The
Slave Beacon performs Full range scanning for all sig-
nal types and fills the Almanac table in parallel.
ANTENNA
The ANTENNA command is used to set the antenna
power state of the external connector.
ANTENNA [Parameter Name] [Parameters List]
[/?]
Parameter
Name
Parameter List
POWER
0 - Switches off the antenna power on connector
1 - Switches on the antenna power on connector
Serial Interfacing Commands
ALARM
The ALARM command is intended to set up the alarm
indication mode and alarm control lines’ behavior.
ALARM [Parameter Name] [Parameters List]
[/?]
Parameter
Name
Parameter List
TTL1
0 – TTL_OUT1 = logic “1”
1 – TTL_OUT1 = TTL_IN, received from remote
unit (default settings)
TTL2
0 – TTL_OUT2 = logic “1”
1 – TTL_OUT2 = TTL_IN2, received from remote
unit (default settings)
2 – TTL_OUT2 = SYNC Loss
BOOT
The BOOT command is intended to reboot the unit
using selected user settings.
HELP
The HELP command types the list of all available
commands:
HELP - Display this usage
XMOD - Activate X-Modem Protocol
BOOT - Reboot the unit
LINK - Set RF Link Operation Mode
SCAN - Set scanning options and criteria
PORT - Set Data Port Configuration
STATE - Display Status and Statistics
SAVE - Save Current Configuration into Con-
figuration File
INFO - Display Product ID along with Hard-
ware/Software Versions
MAP - Operate with Channel Map
ANTENNA - Set the State of antenna power
and selects the RF connector
for Beacon receiver
DATAMODE - Exit Command Mode
COMMAND /? - Display Command Usage
SAVE
The SAVE command is intended to store the unit’s
currently used configuration into the User
Configuration file. The configuration stored in the
User Configuration file is used for next boots.
SLEEP