The J1000 transmitter provides excellent functionality and flexibility for the broadcaster. The advanced PDM modulation correction and automatically adjusted power supply operation voltages yield low distortion figures from 10 watts to 1100 watts. Direct digital synthesis technology ensures a pure and stable RF carrier frequency that can be interfaced to a GPS reference.
The transmitter features a simple bandpass RF filter network with ferrite-tuned inductors and a frequency synthesizer with dialup frequency selection, allowing quick tuning to a new carrier frequency. With its compact size and ease of frequency change, the J1000 is an ideal solution for a mobile back up transmitter.
Transmitter Type: Medium wave, 100% solid state
Configuration: Two 500 W RF power modules each including eight broadband RF amplifiers and four modulators
RF Output Power:
Rated: 1,000 W
Range: 10 W to 1,100 W
Six preset levels, selected locally or remotely
RF Output Connection: Type N
RF Output Impedance: 50 ohms, unbalanced
Frequency Range: 531 kHz to 1,690 kHz (supplied to one frequency as ordered)
Frequency Stability Internal: ±2 ppm over temperature range
Frequency Stability External: GPS 10 MHz dependent on external source
Modulation Capability: 125% positive peak modulation at rated power Incidental Quadrature Modulation 36 dB below 95% modulation at 1,000 Hz
Spurious and Harmonic: Meets or exceeds FCC, IC, and ITU requirements
Voltage: 170 – 270 V ac, 1 phase, 50 Hz or 60 Hz
1,430 W maximum at 1 kW, 0% modulation
2,140 W maximum at 1 kW, 100% modulation
0°C to +50°C
Derate 3°C per 500 m above sea level
(2°C per 1,000 ft)
Humidity Range: 0% to 95% non-condensing
Altitude: 0 m to 4,000 m (0 ft to 13,000 ft)
Dimensions: 58 cm H x 48 cm W x 51 cm D (23″ H x 19″ W x 20″ D)
Weight: 23 kg (50 lbs)
A U D I O PERFORMANCE
Frequency Response: +0.2 dB/-0.8 dB, 30 Hz to 10,000 Hz.
Total Harmonic Distortion: Better than 0.8% (THD), 30 Hz to 10,000 Hz at 95% modulation. Referenced at 1,000 W.
Better than 1.2% (THD), 30 Hz to 10,000 Hz at 95% modulation. Referenced at 100 W.
Reduced antenna bandwidth may specification.
Carrier Shift: 0.5% or less
Hum and Noise: 65 dB or more below 100% modulation
D I G I T A L COMPATIBILITY
Frequency Response: +0.2 dB/-1.5 dB, 30 Hz to 15,000 Hz. Referenced at 1 kHz
Total Harmonic Distortion: Better than 1% (THD), 30 Hz to 15,000 Hz at 95% modulation. Referenced at 1 kHz
Incidental Quadrature Modulation: 35 dB or better (typical), 30 Hz to 15,000 Hz
Specifications established at rated power unless
otherwise noted. All measurements at 50 ohms
resistive load; AC input voltage at nominal level.