NT-2000 REF Manual
Specifications
9-1
9. Specifications
(1) IEC 60945–2002 Equipment Category:
･ Receiver Cabinet: Protected
･ Active Antenna Unit : Exposed
(2) Receive Frequencies :
･ First Receiver: 518 kHz
･ Second Receiver: 490 kHz and 4209.5 kHz, front panel–selectable
(3) Type of Receiver:
･ First Receiver: 518 kHz straight amplifier
･ Second Receiver:
- 490 kHz: 490 kHz straight amplifier
- 4209.5 kHz: Down–conversion to 490 kHz
(4) Antenna Inputs (
518, 490 and 4209.5 kHz):
･ Coaxial: 50Ω(
nominal), matched with ANT–2000 active antenna
･ Unbalanced: 10Ω+ 150 pF for long–wire antenna
(5) Input Protection: 30 V
RMS
for 15 minutes over 100 kHz–28 MHz range
(6) Active Antennas:
・ Standard: Preamplified 1.2m glass–fiber whip (ANT–2000) for
reception of 518 kHz, 490 kHz and 4209.5 kHz, with
1–meter RG–58/U coaxial cable attached,
terminated in BNC and PL–259 plugs for cable
extension.
・Option: Preamplified 1.2m glass–fiber whip (ANT–900) for
reception of 518 kHz, with 30 meter RG–58/U cable
・Option: Preamplified 1.2m glass–fiber whip (ANT–2002) for
reception of 490 kHz and 4209.5 kHz with 30 meter
RG–58/U cable
(7). Receiver Sensitivity: Better than the following values for message
reception with character error rate of less than 4%:
･ 1 μV to coaxial 50Ω input
･ 5 μV to unbalanced (
10Ω+150 pF) input
(8) Demodulator: Quadrature detector, crystal–controlled
(9) Mode of Reception : F1B with forward error correction
( ITU–R REC.
476–3, 540–1 and 625 B–mode
)
･ Single Frequency: Automatic reception and display of message
transmitted on 518 kHz or on user–selected second
receiver frequency (490 kHz or 4209.5 kHz)
･ Dual Frequency: Automatic, simultaneous reception of 518 kHz and
user–selected second receiver frequency (490 kHz or
4209.5 kHz), with automatic display of first
receiver’s live messages while storing second receiver
messages in memory when NAVTEX broadcasts
occur at both frequencies simultaneously.
(
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)
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