| Digital & Microwave System Technology Co., Ltd. |
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Item Number:
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FMT67 |
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Product Name:
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65W FM Exciter |
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Description:
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The FMT67 is a solid-state wideband FM exciter providing a continuously variable RF output form 0 to 65 watts into a 50 Ohm load at any frequency within the 87.5 to 108 MHz FM broadcast band in 10 kHz increments. |
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Features:
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● Easy and direct programming of the frequency, by Dip-Switches, Step 10 KHz.
● Soft-start from RF mute status.
● Adjustable power output from 0 to 65 W with automatic power control, maintaining the output at any fixed level.
● Available with External AUX/MPX input connectors.
● Meets or exceeds all FCC and CCIR requirements.
● High reliability provided by conservatively rated components.
● Modular layout with Plug-in, easy replaceable circuits and parts.
● Built-in stereo coder. |
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Specification:
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TECHNICAL SPECIFICATIONS
�� Rated output power: 0-65 W continuously variable(A.L.C.)
�� R.F output connector: ¡§N¡¨ type
�� R.F output impedance: 50 Ohm
�� Frequency range: 87.5 MHz to 108 MHz
�� Frequency stability: better than ¡Ó100 Hz
�� Modulation type: direct carrier frequency modulation
�� Spurious & Harmonic suppression: meets or exceeds all FCC and CCIR requirements
�� Modulation capability: meets or exceeds all FCC and CCIR requirements
�� Asynchronous AM S/N ratio: 70 dΒ below reference carrier with 100％ Amplitude modulation at 400 Hz. Without de-emphasis, no FM modulation present
�� Synchronous AM S/N ratio: 60 dΒ below reference carrier with 100% amplitude modulation at 400 Hz. Without de-emphasis, FM modulation =¡Ó75KHz at 400 Hz
�� Transient intermodulation distortion: less than 0.1% measured with a 3 KHz square wave and a 15 KHz sine wave at 100% modulation(typical 0.05%)
�� AC power source: 85 to 265 V¡Ó10%, 50-60 Hz, single phase
�� Power consumption: approx 170 W from AC
�� Panel size: 483 mm (19¡¨)W x 132.5 mm (5.2¡¨)H (3 standard rack spaces high)
�� Overall depth: 400 mm (15.7¡¨)
�� Ambient temperature range: -10℃ to +50℃
�� Preemphasis: for FCC 75 microsec, for CCIR 50 microsec Composite operation
�� Composite inputs 1 for External (BNC)
�� MPX input: 2 balanced XLR connector
�� MPX input impedance: 10 K Ohm / 600 Ohm
�� MPX input level: adjustable from -24 to ¡V6 dΒm nominal for ¡Ó75 KHz deviation, adjustable
�� Composite FM S/N ratio: >75dΒ below ¡Ó75KHz deviation at 400 Hz measured in a 30 Hz to 100 KHz bandwidth with 50 or 75μs de-emphasis(RMS)
�� Composite amplitude response: ¡Ó0.5dΒ, 30 Hz to 100 KHz
�� Composite total harmonic distortion: less than 0.1% (0.05% typical)
�� Composite intermodulation distortion: 0.05% or less, measured with a 1 KHz and a 1.3KHz tones, 1:1 ratio, at 100% modulation
�� Stereo separation: >60dΒ(65dΒtypical)
Monaural operation
�� Audio input impedance: 600 Ohm / 10 K Ohm balanced XLR connector 50 d common mode suppression
�� Audio input level: adjustable from -6 to +9 dΒm for ¡Ó75KHz,adjustable
�� FM S/N ratio: >80dΒ below¡Ó75KHz deviation at 400 Hz measured in a 30 Hz to 15 KHz bandwidth with 50-75 microsec de-emphasis(RMS)
�� Audio frequency response: ¡Ó0.5dΒ,30Hz to 75 KHz
�� Total harmonic distortion: 0.05% or less, measured with a 1 KHz
�� Intermodulation distortion: 0.05% or less measured with a 1KHz And a 1.3 KHz tones,1:1 ratio, at 100% modulation
Stereo operation
�� Audio input impedance left/right: 600 Ohm / 10 K Ohm balanced XLR connector
�� Audio input level: adjustable from -6 to +9 dΒm
�� Total harmonic distortion: less than 0.07%(0.05% typical)
�� Audio amplitude response: ¡Ó0.3dΒ, 30 Hz to 15 KHz
�� Stereo separation: >60dΒ
�� Stereo FM S/N ratio: >75dΒ below ¡Ó75 KHz deviation at 400 Hz measured in a 30 Hz to 100 KHz with deenphasis(RMS)
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