1 Introduction
NDB-200G Non-Directional Beacon is medium frequency radio navigation equipment, technical performance meet applicable requirements of ICAO Annex 10. NDB-200G can be installed in the navigation spot of airport, airway, maritime or land oil platform, used as a navigation aid.
2.Component, dimension and weight
2.1 Name：NDB
Dimension(mm)：1950×695×645
Quantity：1
Weight(kg)：5
Remark：190
2.2 Name：Remote control unit
Dimension(mm)：1950×695×645
Quantity：1
Weight(kg)：5.5
3.Frequency range
150kHz～800kHz.
4.Channel
651 channels (frequency interval 1 KHz).
5.Frequency tolerance
±50×10-6 of nominal.
6.Output Power
100W, 200W
Continuingly adjustable on the rating output power range .
7.
Amplitude
Modulation
Range
Up to 95%, total harmonic distortion of audio tones less than 5%.
8.Amplitude modulation audio
1020Hz±50Hz.
9.
Working
State and mode
There are five working states: Auto-amplitude-modulation message(auto-tone-keying), auto-equiamplitude message (auto-carrier-keying),manual-amplitude modulation message (manual-tone-keying), manual-equiamplitude message(manual-carrier-keying), amplitude modulation word(voice modulation).
There are five working modes: unit A service 、unit B service、A service & B standby、B service & A standby and remote control.
10.Remote Control
Remote control turning on and turning off, remote control working mode choosing, remote inspect the identification code, RF output, power supply alarm signals of NDB.
Remote control use a pair of 600W telephone line, when loop resistance £2kW, effect distance³10Km.
11.Dual-machine Automatic changeover
Machine A&B can automatically change from host machine to standby machine. When output power descend 3dB, or power failure, host machine out of service and standby machine automatic start service, while Remote control unit will also emit sound and light alarm in the event of alarm or failure condition.
12.Carrier harmonic level
£－50dBc.
13.
Antenna
Equivalent
Impedance
Range
Resistance: 5W～25W;
Capacitance: 300pF～1200pF（exclude 50pF distributing capacitance）.
14.Antenna Automatic Tune
Automatic tune to resonance when output power descends to 70% caused by antenna mistuning
15.Power Supply Requirement
AC: 220V+10-15%, 50Hz single-phase. When RF power output is 200W, current does not exceed 3A.
DC: 48V battery, when RF power output is 200W, current does not exceed 7A.
16.Ambient Temperature
Working temperature: －25°C～ ＋ 55°C
Storing temperature: －45°C ～＋70°C
Relative Humidity
Up to 95±3%（＋40°C）
17.Working Hours
24h continuous work.
18.Storing period of equipment
One year
