NDB-200G
l Pulse width modulation (PWM), Class D amplifiers, Power synthesiger.
l Output power: 100W/200W, adjustable.
l Frequency range:150~800KHz 1KHz frequency
channel spacing, Frequency synthesizer.
l Frequency stability: better than 0.005%.
l Two identical channel in single cabinet, One operating and one stand by, Automatic switch over.
l 2 lines remote control and monitoring, no attendance operation.
l Ambient temperature:-25~+55℃, continuous operation.
l AC or DC power supply, switch power supply technology.
AC power requirement: 220V, 50Hz, 2.3A(100W), 3.4A(200W)
DC power requirement: 48V, 4.1A(100W), 7.1A(200W)
Technical Specifications
1、 Frequency range 150kHz～800kHz.
2、 Channel 651 channels (frequency interval 1 KHz).
3、 Frequency tolerance ±50×10-6 of nominal.
4、 Output Power 100W, 200W Continuingly adjustable on the rating output power range.
5、
Amplitude
Modulation
Range Up to 95%, total harmonic distortion of audio tones less than 5%.
6、 Amplitude modulation audio 1020Hz±50Hz.
7、
Working
State and mode
8、 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.
9、 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.
10、 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.
11、 Carrier harmonic level £－50dBc.
12、
Antenna
Equivalent
Impedance
Range
Resistance: 5W～25W;
Capacitance: 300pF～1200pF（exclude 50pF distributing capacitance）.
13、 Antenna Automatic Tune
Automatic tune to resonance when output power descends to 70% caused by antenna mistuning
14、 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.
15、Ambient Temperature
Working temperature: －25°C~＋ 55°C
Storing temperature: －45°C~＋70°C
Relative Humidity Up to 95±3%（＋40°C）
16、Working Hours 24h continuous work.
17、Storing period of equipment One year
.
