JMC NT–2000 - NAVTEX Receiver Masks

NT-2000 REF Manual
Installation
7-16
7.4.2. NAVTEX Receiver Masks
The following command is used to manipulate the configuration masks that control
which messages of which stations are to be received/stored and sent to the RS–422 port
or to the RS–232C port. User settings made via the keypad will be changed accordingly.
$CRNRM
,
X
,
X
,
hhhhhhhh
,
hhhhhhhh
*
hh <CR> <LF>
① ② ③ ④
①Function code: 0 – 9
0 = request messages, 1 = set/report storage mask, 2 = set/report printer mask
3 = set/report INS mask, 4 to 9 = reserved
② Frequency index: 1 – 9
1= 490 kHz, 2 = 518 kHz, 3 =4209.5 kHz, 4 to 9 = reserved
③ Transmitter ID mask (32 bits in total)
LSB = station A, bit 1 = station B, bit 25 = station Z, bits 26 to 32 =
reserved
To select a station, its corresponding bit should be set to “1.” To reject a station, its
corresponding bit should be set to “0.”
For example, to select stations E, J, M and T only, set the bit masks as follows:
00081210 hex
0 0 0 8 1 2 1 0 (hex)
0000 0000 0000 1000 0001 0010 0001 0000 (
binary)
ZY XWVU TSRQ PONM LKJI HGFE DCBA (station)
④ Message type mask (32 bits in total):
LSB = type A, bit 1= type B, bit 25 = type Z, bits 26 to 32 = reserved
To select message types A, B, D, F and L only, set their bit masks as follows:
0000082B hex
0 0 0 0 0 8 2 B (hex)
0000 0000 0000 0000 0000 1000 0010 1011 (
binary)
ZY XWVU TSRQ PONM LKJI HGFE DCBA (type)
NOTE: Message types A, B, D and L must always be selected due to the relevant IMO
resolution, and their corresponding bits cannot be set to “0.”
The equipment accepts the following query command sentence to report the current bit
masks:
$ - - CRQ,NRM
*
hh<CR><LF>
Example: Device identifier = IN (INS), checksum=3A hex
$ INCRQ,NRM
*
3A<CR><LF>