Overview
Armstrong X-500B & X-1000B AM Transmitters
The Armstrong design team has done it again. This time creating a Low Power AM transmitter line that continues Armstrong's legacy and reputation for reliability and quality. The "X" series of AM Transmitters.
These rugged and reliable transmitters are designed for low maintenance and high quality audio.
Offered at 500 watts and 1KW these compact Solid State Transmitters are HD Radio ready. They feature Optimized multiphase modulation, 90% PA efficiency with 80% overall efficiency (AC in to RF out).
Housed in a heavy duty aluminum chassis they easily fit into a 19" rack taking up only 7 rack spaces (12.25")and they feature hot pluggable 600 watt modules. The "X" series has three power level settings, that can be easily field set, to give you versatility for full power and pre sunrise/post sunset power adjustment. They are capable of 150% positive modulation and offer complete remote control capability via a rear mounted DB 25 connector.
These compact, rock solid, performers offer the perfect solution for the replacement of the older style Solid State and tube AM transmitters.
Armstrong's "X" series is HD Radio* compatible, featuring an external RF input which can be used for digital signal injection..
* HD Radio is a registered trademark of iBiquity Digital Corporation
- 90% RF PA efficiency
- Optimized multiphase modulator (flat group delay, low source impedance)
- Capable of +150% positive modulation
- Hot pluggable modules (X1000B)
- Designed to easily accept the new digital IBOC signal
- Three preset power levels and full remote control capability
- Fully redundant RF, modulator, cooling system and power supplies
Specifications
Electrical Specifications
Power Output
- X-1000B 1KW (rated), 1,200 (capable).
- X-500B 500 Watt Rated, 600 (capable).
- Continuously adjustable
- Three power level presets
- Frequency Range: 530kHz to 1700kHz
- Output Impedance: 50 ohms unbalanced, Type PL259
- Modulator Type: Pulse Duration Modulation (PDM)
- Audio Frequency Response: +\- 0.5db, 30-10,000Hz
- Square Wave Overshoot: 2% at 400 Hz
- Square Wave Tilt: 3% or less at 40Hz
- Audio Harmonic Distortion: Better than 1%(THD) at 95% modulation 30-10,000Hz(reduced antenna bandwidth may degrade specifications)
- Audio Intermod: 1% or less at 1KW 60/7000Hz 4:1ratio SMPTE Standards Distortion at 85%modulation
- Modulation Capability: 150%(rated) 165% (capable)
- Carrier Shift: Not to exceed 1%
- RF Harmonics: 73d B or more below 1KW
- Spurious Outputs: 73 dB below 1KW
- Noise and Hum: 60db or more below 100% modulation at 1KW
- Frequency Stability: +\-5 ppm
- Audio Input: 600 ohms active balanced +10dBm nominal
- Power Input: 190-260 VAC, single phase
- Power Consumption:X-1000B 1400 Watts at 1KW 0% modulation 1750 Watts at 1KW, 100% continuous sine wave modulation. X-500B 600 Watts at 500W 0% Modulation, 900 Watts at 500W 100% continuous sine wave modulation
- Remote control/monitor: DB25 Connector
Mechanical and Environmental Specifications
- Ambient Temperature: -10oC to 50o C
- Humidity Range: 95% max, non-condensing
- Altitude 8,000: feet
- Size: 12.25” high x 19” wide x 20” deep
- Weight: X-1000B 132 lbs // X-500B 98lbs
