DX® AM Transmitter Family

10, 15 and 200-2000 kW Solid-State AM Transmitters

The Harris® DX® family — made up of the DX 10, DX 15 and DX 200-2000 kW solid-state AM transmitters — will stay on the air no matter how demanding the broadcast needs. Hundreds of broadcasters have benefited from the superior performance and reliability provided by Harris-patented digital amplitude modulation. DX transmitters provide unsurpassed audio performance, improved coverage, simple operation, the lowest cost of operation and the highest reliability of any medium-wave transmitter. Extensive options are available to tailor the DX system to facility needs, including both air- and liquid-cooling options.

A digitally modulated transmitter, the DX system is ready for DRM (Digital Radio Mondiale) or HD Radio™. Simply add the appropriate exciter, and DX is on the air in digital broadcast mode. DX transmitters are also now able to provide IP-based control and monitoring using Harris WEB Remote tied to the station's LAN or directly to the Internet.

HD Radio is a trademark of iBiquity Digital Corp.

Features

Digital — DX transmitters have Direct Digital Synthesis of the RF envelope using true digital modulation, not PDM
Reliable — DX transmitters have set a new standard for RF amplifier reliability and ruggedness. The RF modules run exceptionally cool
Simple — Simple to operate and maintain, DX transmitters use standard off-the-shelf components, which are easily accessible and field repairable
Efficient — DX transmitters are proven to yield typical efficiency of over 83 percent, resulting in the industry’s lowest power cost.
Rugged — Failures are virtually eliminated through a patented lightning protection system. Built-in surge protection is standard on all AC mains lines and internal power supplies
Redundant — In critical areas, DX transmitters use redundant circuit designs. Soft failure and FLEXPatch reassignment ensure uninterrupted broadcasting without significant degradation in performance. Broadband, interchangeable RF amplifier modules simplify maintenance
Future Compatibility — Future digital broadcast compatibility is ensured with high peak-to-average power capability, exceptional audio bandwidth and virtually no audio-to-RF group delay variation. DX transmitters have been used for IBOC field tests

Specifications

Specifications and designs are subject to change without notice.

General
Type of Modulation	Harris-patented AM Digital amplitude modulation
Transmitter Type	Medium-wave, 100 percent solid state

Power Output Range
DX 10	1 to 11 kW
DX 15	2 to 15 kW
DX 200 to 2000	40 to 200 kW All 3 models are capable of combined operation, 3 adjustable pre-set power levels are provided

Frequency Range
DX 10/15	531 to 1705 kHz
DX 200 to 2000	531 to 1620 kHz All 3 models supplied, tuned and tested to 1 frequency, as specified

AC Mains Input
DX 10/15	197 to 281 VAC, 3-phase, 341 to 468 VAC, 3 phase, 4 wire
DX 200 to 2000	380 to 20 k VAC, 3-phase user specified 360 to 500 VAC, 3-phase 190 to 260 VAC, single phase

Power Supply Variation
DX 10/15	±10% voltage, 48 to 63 Hz
DX 200 to 2000	+10/-15% voltage, 48 to 63 Hz

Transient Protection
DX 10/15	Meets IEC 587 requirements
DX 200 to 2000	Meets ANSI/IEEE C62.41-1980 requirements

Power Factor
DX 10/15	0.98% typical
DX 200 to 2000	0.95% typical, with optional correction

Frequency Stability
All three models	±10 Hz, 0 to 50° C, ±2 Hz at typical conditions

Audio Input
All three models	-10 to +10 dBm, adjustable transformerless input; 600, 150, and 50 ohms terminators provided

RF Output
DX 10/15	15/8 in. EIA flange
DX 200 to 2000	4-1/16 in. EIA flange (female), 50 ohms unbalanced Other impedances available upon request per quotation

RF Load
DX 10/15	50 ohms, unbalanced
DX 200 to 2000	50 ohms, nominal Front-panel matching adjustments Antenna matching range 1.2:1 VSWR minimum

Cabinet and Harmonic/Spurious Radiation
DX 10/15	Meets FCC, CCIR and IC requirements
DX 200 to 2000	Meets CCIR requirements

Overall AC Efficiency
DX 10/15	Typically 83% at 10 and 15 kW
DX 200 to 2000	Typically 86% at 200 kW

General Specifications Specifically for DX 200 to 2000 kW Model

RF Monitor Provisions
DX 200 to 2000	Up to 10 V RMS RF modulated output sample (up to 6v pp constant sample level for high-, medium- or low-power settings) 5 V RMS RF frequency monitor sample

Power Consumption
DX 200 to 2000	229.9 kW or less (typical) at 200 kW, 0% modulation; 348.8 kW or less (typical) at 200 kW, 100% tone modulation

Audio Performance

Audio Frequency Response
DX 10/15	+0.2/-0.8 dB, 20 Hz to 10 kHz, reference 1 kHz at 95% modulation
DX 200 to 2000	+0.2/-0.8 dB, 50 Hz to 10 kHz, reference 1kHz

Total Harmonic Distortion
DX 10	0.8% or less at 95% modulation, 30 Hz to 10 kHz, at 10 kW; 0.5% typical
DX 15	1.0% or less at 95% modulation, 30 Hz to 10 kHz, at 15 kW, 0.3% typical
DX 200 to 2000	0.8% or less THD at 95% modulation, 50 Hz to 10 kHz at 200 kW

Intermodulation Distortion
DX 10	0.8% or less, 1:1, 60/7000 Hz; 1.3% or less 4:1, 60/7000 Hz; SMPTE at 95% modulation, no audio filters required
DX 15	1.0% or less, 1:1, 60/7000 Hz; 1.4% or less 4:1, 60/7000 Hz; SMPTE at 95% modulation, no audio filters required
DX 200 to 2000	1.5% or less, 1:1, 60/7000 Hz; 2% or less, 4:1, 60/7000 Hz; SMPTE at 95% modulation, no audio filters required

Transient Intermodulation Distortion
DX 10	0.3% or less at 95% modulation
DX 15	2.96/8.0 kHz, 4:1, no audio filters required. 0.5% or less at 95% modulation, 2.96/8.0 kHz, 4:1, no audio filters required
DX 200 to 2000	0.7% at 95% modulation, 2.96/8.0 kHz, 4:1, no audio filters required

Squarewave Overshoot
DX 10/15	0.3% or less at 400 Hz, 85% modulation, measured pk-pk, no audio filters required
DX 200 to 2000	1% or less at 400 Hz, 80% modulation

Squarewave Tilt
DX 10/15	0.5% or less at 40 Hz, 80% modulation, no audio filters required
DX 200 to 2000	2% or less at 50 Hz, 80% modulation, no audio filters required

Carrier Shift
All three models	Less than 1%, referenced to 1 kHz, 100% modulation

Hum and Noise
All three models	-65 dB or better below 100% modulation (unweighted)

Positive Peak Capability
DX 10	+145% at 10 kW; +125% at 11 kW (program modulation)
DX 15	+135 at 15 kW (program modulation)
DX 200 to 2000	+125%

Duty Cycle
DX 10/15	Continuous, 100% modulated sine wave
DX 200 to 2000	100% single tone for 10 minutes, followed by 75% single tone modulation for 50 minutes, at normal factory ambient temperature

Audio Performance Specifications Specifically for the DX 10/15 kW Models
IQM	DX 10/15: -32 dB at 1 kHz, 95% modulation; -40 dB typical

Service Conditions

Ambient Temperature
DX 10/15	-10° C to +50° C; derated 2° C per 1,000 feet (305 m) of altitude
DX 200 to 2000	0° C to +45° C, (derate 2° C/1,000 ft of altitude)

Altitude
DX 10/15	Up to 13,000 ft (3,962 m)
DX 200 to 2000	Up to 6,000 ft (1,829 m); higher altitudes available on request for quotation

Humidity Range
DX 10/15	0 to 95%, non-condensing
DX 200 to 2000	0 to 95%, non-condensing

Dimensions (H x W x D)
DX 10/15	78 x 72 x 33 in. (198 x 183 x 84 cm)
DX 200 to 2000	78 x 160 x 48 in. (198 x 406 x 122 cm)

Weight
DX 10	1,535 lbs. (698 kg)
DX 15	1,700 lbs. (773 kg)
DX 200 to 2000	5,450 lbs. (2,472 kg) unpacked

Service Conditions Specifically for the DX 10/15 kW Models
Temperature Rise (Inlet/Outlet Air)	DX 10/15: Approximately 6° C

RF Monitor Provisions	DX 10/15: Up to 10 volt RMS RF modulated output sample (constant sample level at high-, medium- or low-power setting) 5 volt RMS RF frequency monitor sample, nominal over specified power range

Power Consumption
DX 10	11.6 kW typical at 10 kW, 0% modulation; 17.4 kW typical at 10 kW, 100% tone modulation
DX 15	17.4 kW typical at 15 kW, 0% modulation; 26.2 kW typical at 15 kW, 100% tone modulation

Notes 1. All measurements made into test load at rated power. 2. Noise may degrade if AC lines are unbalanced.