APPENDIX 7 DIGITAL INTERFACE (IEC 61162-1 EDITION 4(2010-11))
AP-13
• HBT: Heartbeat Supervision Sentence
• HDT: Heading, true
• MSK: Receiver Interface Command
• MSS: MSK Receiver Signal Status
• THS: True Heading And Status
$**HBT,x.x,A,x*hh<CR><LF>
1 2 3
1. Configured repeat interval (1 to 999(s))
2. Equipment status (A=Normal V=System fail)
3. Sequential sentence identifier (0 to 9)
$**HDT, xxx.x,T*hh<CR><LF>
1 2
1. Heading, degrees (0.0 to 360.0)
2. True (T)
$**MSK,x.x,a,x.x,a,x.x,x,a *hh<CR><LF>
1 2 3 4 5 6 7
1. Beacon frequency, kHz (283.45 to 325.04)
2. Auto/Manual frequency (See note 2) (A=Auto, M=Manual)
3. Beacon bit rate, bits/s (25, 50, 100, 150, 200)
4. Auto/Manual beacon bit rate (See note 2) (A=Auto, M=Manual)
5. Interval for sending $**MSS (status) in seconds (See note 1) (1 to 99, null))
6. Channel number (See note 3) (Fixed at 1)
7. Sentence status flag (See note 4) (R, C) (R=Sentence status is a report of current settings (use for
a reply to a query, C=Sentence is a configuration command to change settings. A sentence
without “C” is not a command.)
Notes:
1) When status data is not to be transmitted this field is "null".
2) If Auto is specified the previous field value is ignored.
3) Set equal to “1” or null for single channel receiver.
4) This field is used to indicate a sentence that is a status report of current settings or a configuration
command changing settings. This field should not be null.
$ ** MSS,x.x,x.x,x.x,x.x,x *hh <CR><LF>
1 2 3 4 5
1. Signal strength (SS), dB/(1μV/m) (0.0 to 999.94)
2. Signal-to-noise ratio (SN), dB (0.0 to 999.94)
3. Beacon frequency, kHz (283.5 to 325.04)
4. Beacon bit rate, bits/s (25, 50, 100, 200)
5. Channel number (1,null)(Set to “1” or “null” for single channel receivers.)
$**THS,x.x,a*hh<CR><LF>
1 2
1. Heading, degrees True (0.0 to 360.0)
2. Mode indicator (A=Autonomous, S=Simulator)
To Next Page
Loading...
