NT-2000 REF Manual
Specifications
9-3
9. Specifications (
continued
–
3/4
)
(
18) Message Protection: Up to 50 messages can be protected against
automatic erasure, and are saved in a separate area
of the non–volatile message memory. Protection of a
user–selected message can be
*cancelled to allow
automatic erasure after a 60–hour time passage.
Protected messages are indicated with tag
iPROTECTEDi attached to the message ID.
*
Removing the tag requires user confirmation
.
(
19) Message ID Storage:
･ Capacity: 200 IDs of successfully received messages on each of
518 kHz, 490 kHz and 4209.5 kHz
･ Duration: 60 hours
(
20) Stored Message Outputs: The following messages can be selectively output via
rear panel RS–422, RS–232C and I/O DATA ports:
･ All currently displayed messages or currently
displayed messages of user’s choice
･ All stored messages
･ Stored messages of user’s choice by specifying
frequency, transmitter or message type
(
21) External I/O Interfaces:
･ Printer Interface: RS–232C port ( MAX3232 transceiver)
･ IBS/INS
: RS–422 port (MAX3490 transceiver) with input
lines optically isolated
･ NMEA–0183/IEC 61162–1: 8–pin connector (I/O DATA port)
･ Alarm Activation Output: 2 isolated pairs of relay contacts (ALARM port)
(
22) Message Alarm Specifications:
･ Audible Indication: Beeping from front–facing piezoelectric buzzer
- 1–second intervals: Type D messages
- 3–second intervals: Types, A, B and L messages
･ Visual Indication: Red tag iALARM!i attached to ID
ID and message text displayed in red color for type D
messages (SAR).
･
Acknowledgement/Muting: Manually with front panel button or by means of
IEC61162–format command (
IEC 61162–1 compliant
$--ACK command) via RS–422 input port.
･
Alarm Conditions Output: IEC 61162–1 compliant $CRALR sentences
containing local alarm numbers and alarm text via
RS–422 output port. See paragraph 7.4.3 for details.
NOTE: See section 10 (List of Alarms) for additional information on alarms.
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continued on next page
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