AE–1800 Instruction Manual
Specifications
9 . Sp e ci fi c a ti o n s
(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 or by
*
1
proprietary command sentence via RS–422 port
(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 Input:
Coaxial: 50
Ω
(
nominal
)
, matched with
ANT–2000M
active 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–2000M
) 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.
(7) Message Display:
5.7”
(diagonal) color TFT, QVGA (320
X
240
pixels)
(8). Receiver Sensitivity:
Better than the following value for message reception
with character error rate (CER) of less than 4%
:
･
1
μ
V e.m.f.
to coaxial input
(9) Demodulator:
Quadrature detector, crystal–controlled
(10) Mode of Reception:
F1B with forward error correction
(Annex
Ⅱ
to ITU–R
REC. 476–3, M.540–2 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.
(11) Second Receiver Selection:
490 kHz or 4209.5 kHz selectable via menu system or
*
1
proprietary command sentence via RS–422 port
*
1
:
See paragraph 7.4.6 for detail.
(12) Source of Time:
Derived from CPU clock 24.00 MHz for calculation of
time passage to handle message aging. No real time
clock (RTC) is used.
(13) User Interface Language:
English ( menus, status, prompts, cautions)
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continued on next page
)
