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Technical Specifications

 

FM 250C - Technical Specifications

Nov 20, 2017

General

RF Power Output25-250W
Output Impedance50 Ohms
Frequency Range87.5MHz to 108MHz in 10kHz increments
Frequency Stability+/-300Hz, +32 degrees F to +122 degrees F (0 degrees C to +50 degrees C)

Composite

Connector TypeBNC (3); un-balanced, balanced, front panel test
Input Level3.5 V p-p nominal, for ±75 kHz deviation
ImpedanceUnbalanced: 10 kOhm, nominal, resistive. Balanced: 10 kOhm or 50 Ohm, programmable, jumper selected
Amplitude Response±0.1 dB, 30 Hz to 53 kHz
Phase Response±0.25 degree from linear phase, 30 Hz to 53 kHz
THD + Noise0.02% or less
Intermod Dist0.02% or less
S/N Radio85 dB below 100% modulation @ 400 Hz
Asychronous AM S/N Ratio55 dB below rated power reference carrier with 100% AM modulation at 400 Hz, 75 μs de-emphasis with no FM modulation present
Synchronous AM S/N Ratio50 dB below rated power reference carrier with 100% AM modulation at 400 Hz, 75 μs de-emphasis with FM modulation ±75 kHz at 400 Hz

Mono

Connector TypeTerminal Block
Input Level+10 dBm nominal for ±75 kHz deviation @ 400 Hz, adaptable to other levels
Impedance600 Ohm balanced, resistive, adaptable to other impedances, 60 dB common mode suppression
Amplitude Response±0.5 dB, 30 Hz to 15 kHz; selectable flat, 25, 50, or 75 μs pre-emphasis
THD + Noise0.02% or less
Intermod Dist0.02% or less
S/N Radio85 dB below 100% modulation @ 400 Hz
Asychronous AM S/N Ratio55 dB below rated power reference carrier with 100% AM modulation at 400 Hz, 75 μs de-emphasis with no FM modulation present
Synchronous AM S/N Ratio50 dB below rated power reference carrier with 100% AM modulation at 400 Hz, 75 μs de-emphasis with FM modulation ±75 kHz at 400 Hz

SCA

External:
Connector TypeBNC (3); un-balanced
Input Level3.5 V p-p nominal for 7.5 kHz deviation
Impedance100 kohm nominal; resistive
Amplitude Response±0.2 dB, 40 kHz to 100 kHz

All Specifications Subject to Change Without Notice


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