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418G DRM
100kW Shortwave Transmitter
Building on the success of its solid-state modulator product line, Continental Electronics brings high-efficiency DRM transmissions to the world with its 418/419/420 product line of shortwave broadcast transmitters. Whether you are looking for a DRM upgrade, a brand new fully compliant DRM transmitter or even a fully configured DRM content server, Continental has your solution.
C@™º¬™Ñ™º|® E®ÑźÆ@™¬ÅØ 4212 South Buckner Blvd. Dallas, Texas 75227 phone: 214.381.7161 · fax: 214.381.3250 e-mail:
[email protected]
418G DRM Specifications ELECTRICAL
ENVIRONMENT
AUDIO (continued)
RF Carrier Output Power (A3E)
Ambient Temperature Range
Audio Response (h3E & R3E)
100 kW (400 kW PEP)
Indoors: +40 to +111 degrees F (+5 +45 degrees C) Outdoors: +14 to +111 degrees F (-10 to +45 degrees C)
Audio Harmonic Distortion (A3E)
Reduced RF Carrier Output Power (A3E) 25 kW - 100 kW
Relative Humidity Range 200 kW PEP
0 to 95% relative humidity, noncondensing
RF Output Power Program (R3E)
Altitude
RF Output Power 2-Tone (h3E)
300 kW PEP
Up to 6,000 ft (1,829 m) above sea level
RF Output Impedance
Cooling
+/-0.5 dB from 100 to 4,500 Hz at any level up to the average power capability
<2% at 90% modulation from 50 to 4,500 Hz; 3% from 4,500 to 7,500 Hz.
Audio Harmonic Distortion (h3E & R3E) <2% at 90% at full average power capability from 100 to 4,500 Hz.
Intermodulation Distortion (A3E, h3E & R3E)
50 or 75 ohms unbalanced; 300 ohms balanced (balun supplied with transmitter)
Water, heat exchanger (supplied), and air cooling
Standing Wave Ratio
AUDIO
Carrier Reduction (h3E & R3E)
Modes of Emission
-3 to -24 dB relative to PEP, adjustable in 3 dB steps.
2.0:1 VSWR at full power
Tuning Time
AM (A3E), SSB (h3E & R3E)
An average of 10 typical frequency changes take less than 25 seconds each
Modulation Method
Frequency Range
At least -35 dB relative to either tone of a two-tone test signal.
Audio Input Requirements High level plate modulation using high efficiency solid state modulator
Adjustable from -8 to +10 dBm for 100% modulation
Audio Input Impedance Modulation Capability
600 ohms or 10K ohms, balanced
RF CARRIER
AC Power Source
70% continuous; 100% sinusoidal modulation at audio frequencies from 50 to 7,500 Hz for up to 10 minutes per hour
Customer specified: 360-480 VAC, 50/60 Hz, 3-phase, other voltages available on request
Controlled Carrier Modulation (CCM)
3.2-22 MHz continuous in 1 kHz increments, (2.3-16 MHz or 3.95-26.1 MHz optional ranges).
Efficiency Greater than or equal to 70%
MECHANICAL Weight 12,320 lbs. (5,587 kg) before packing
Dimensions 192 in. (488 cm) wide 60 in. (152 cm) deep 85 in. (216 cm) high
Capable of operating in CCM mode, a power saving modulation technique that allows scaling of the carrier amplitude to the modulation percentage, automatically reducing carrier level as much as 6 dB
Carrier Level Shift (A3E) Less than or equal to +/-3% shift at 100% tone modulation with 1 kHz sine wave exclusive of power line variations.
Carrier Noise -56 dB unweighted referenced to 100% modulation with a 1 kHz tone.
Harmonic and Spurious Radiation Meets or exceeds FCC and CCIR requirements
Audio Response (A3E) +/-0.5 dB from 50 to 4,500 Hz, +/-1 dB from 4,500 to 7,500 Hz at less than or equal to 70% modulation
DEMOD3 DRM Exciter
