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AM-PDM Transmitter PDF Print E-mail
Written by Eddy Santoso   
May 05, 2010 at 01:18 PM
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AM-PDM Transmitter
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AM PDM Transmitter• 500W (AM-500), 1000W (AM-1), 2500W (AM-2.5), 3000W (AM-3), or 5000W (AM-5) output power in continuous service : all parts used in these transmitters are oversized to guarantee the full power 24/24 hours even in hard environmental conditions.

• 522 – 1750 KHz: the frequency of these amplifiers can be easily field tuned from 522 KHz to 1750 KHz without any parts modification.

• High Efficiency Output. The amplifier uses strong and reliable Cold-Mosfets in modern Class-E configuration for RF Power Amplifier and Class-D (digital) configuration for PDM (Pulse Duration Modulation) Power Modulator, minimizes the losses, increases amplifiers efficiency and Lowering the power consumption. These systems are widely used in the broadcast field, that assure long life and low maintenance costs.

• Modularization System. Designed for the best system reliability

• Adjustable output power. The Solid state allows the adjustment of output power simply varying the input one.

• Electronic protections system assures an affordable and stable operation protecting units against major fault conditions. Every alarm event is displayed by front panel LEDs and can be resetted by manual control and/or automatic reset control.

• Full metering. All the main parameters of the amplifiers are front panel displayed by a complete measurement system.

• Soft-start circuit control: the gradual insertion of power supply eliminate transient problems during start-up.

• Forced air cooling. An oversized cooling system guarantees regular functioning and long life for the high power amplifier Module set even in hard environmental places.

• Meets or exceeds international standards for safety and electrical specifications.

Specification for AM-PDM Transmitter :

1. Rated Carrier Output :
• AM-500 : 500Wp-p
• AM-1 : 1000Wp-p
• AM-2.5 : 2500Wp-p
• AM-3 : 3000Wp-p
• AM-5 : 5000Wp-p

2. Radio Frequency Range : 525Khz – 1700Khz
3. Modulation System : Final Stage Series Pulse Duration Modulation
4. Audio Frequency Response : 50Hz – 7,5KHz Flat Within +/- 1dB
5. Audio Frequency Distortion : Less Than 3% at 95% Modulation
6. Noise Level : Better than -60dB, 1Khz at 100% Modulation
7. Carrier Shift : Less Than 3% (1Khz, 100% Modulation)
8. Carrier Frequency Stability : Within +/- 2Khz
9. Audio Input Level : 0 to +10dBm Adjustable at 1Khz for 100% Modulation
10. Audio Input Impedance : 600?, +/-10%, Balanced
11. Audio Input Connector : XLR, Balanced, both L and R Audio Input
12. Output RF Impedance : 50?, Unbalanced
13. RF Output Connector : PL-259-Male, others on request
14. Modulation Capabilities : From 50Hz-7500Hz at 100% Continuous Modulation
15. Spurious : Below -45dB
16. Power Consumption : More than 65%
17. Ambient Temperature : From -10 to +45°C
18. Humidity : Less than 95%
19. Cooling System : Forced-Air Cooling
20. Power Requirement : AC-220 Volts, 50/60Hz, single phase
21. Protections (depends on models) :
• SWR, RF PWR Limit, Temperature
• PSU Over Current, Over Voltage
• Reset, on/off, stand-by (others on request)

Features and specifications subject to change without notice.

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Last Updated ( May 05, 2010 at 04:54 PM )

AM stereo, salah satu sistem yang direkomendasikan oleh FCC adalah AM-Stereo C-QUAM. Sistem AM Stereo pada Pemancar maupun Penerima Radio, jauh lebih kompleks dari pada Sistem FM Stereo.

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