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Surplus Equipment

Used AM Transmitters

 
Used FM Transmitters
 
 
 
 
 
 
 
 
 

 

BE FM-5A TECHNICAL SPECIFICATIONS

 

GENERAL

POWER OUTPUT: 5kW (from 2.5kW to 5.5kW).

FREQUENCY RANGE: 87.5 to 108 MHz, tuned to specified operating frequency.  Exciter programmable in 10kHz increments.

RF OUTRUT IMPEDANCE: 50 ohms (others on special request).

OUTPUT CONNECTOR. 1 5/8” EIA flange.

VSWR: 1:8:1 maximum (will operate into higher VSWR with automatic power reduction).

FREQUENCY STABILITY: +/- 30OHz, 0 to 50C, temperature compensated crystal oscillator.

TYPE OF MODULATION: Direct frequency modulation of carrier frequency.

MODULATION CAPABILITY: Greater than +/-200 kHz.

MODULATION INDICATION: Peak reading, color coded, LED display with baseband over-modulation indicator.

EXCITER:Solid state, 30 watt output, Model FX-30; incorporates digitally programmed synthesizer (10 kHz increments).

PRE-EMPHASIS: FCC 75uS, CCIR 50uS (where specified), or 25uS (Dolby).

ASYNCHRONOUS AM S/N RATIO: 55dB below reference carrier with 100% AM modulation @ 40OHz, 75 microsecond de-emphasis. (no FM modulation present).

SYNCHRONOUS AM S/N RATIO: 40dB below reference carrier with 100% AM modulation @ 40OHz, 75 microsecond de-emphasis. (FM modulation +/- 75kHz @ 400Hz).

TUBE COMPLEMENT: 4CX3500A (1).

RIF HARMONICS: Supression meets all FCC/DOC requirements and CCIR recommendations.

POWER SUPPLY RECTIFIERS: Silicon.

ELECTRICAL/MECHANICAL

AC INPUT POWER: 208V WYE/240V Delta, 50/60Hz, three phase. (Taps for 196 to 252V). (Other voltages are available upon request).

POWER CONSUMPTION: 8.5kW, 0.9PF @ 5kW output.

SIZEIWEIGHT/CUBAGE: 34.5" W (87.63 cm) x 70" H (177.8 cm) x 37.25" D (94.61 cm).  Weight 1000 lbs. (455 kg unpacked; 1200 lbs. packed 545 kg.) Cubage: Net 53 cu. ft. (1.5 cu.m.) Packed 60 cu. ft. (2 cu. m.)

ALTITUDE:    7500 ft. @ 50 Hz (2286 M) 10,000 ft. @ 60 Hz (3048 M).

AMBIENT TEMPERATURE RANGE: -10C to +50C.

FINISH:      BE blue with anodized aluminum control center panel and anodized aluminum trim,

 

*MONAURAL OPERATION

 AUDIO INPUT IMPEDANCE: 600 ohms balanced, resistive, adaptable to other impedances, 50 dB common mode supression.

AUDIO INPUT LEVEL: +10 dBrn nominal for +/- 75 kHz deviation @ 400 Hz.

AUDIO FREQUENCY RESPONSE: +/-0.5 dB, 30 Hz to 15 kHz, selectable flat, 25, 50 or 75 microsecond pre-emphasis.

HARMONIC DISTORTION: 0.08% or less, 30 Hz to 15 kHz.

INTERMODULATION DISTORTION: 0.08% or less, 60 Hz/7 kHz, 4:1 ratio.

TRANSIENT IMD: 0. 1 % or less (square wave/ sine wave).

FM S/N RATIO: 75 dB below +/-75 kHz deviation @ 400 Hz (78 dB typical) measured in a 30 Hz to 15 kHz bandwidth with 75 microsecond deemphasis.

 

*WIDEBAND COMPOSITE OPERATION (Thru FM-5A using FX-30)

COMPOSITE INPUTS: 3 total, (1) unbalanced and (1) balanced plus front panel test.  BNC connectors.

COMPOSITE INPUT IMPEDANCE: 10 k ohm, nominal, resistive.

COMPOSITE INPUT LEVEL: 3.5 VP-P nominal, for +75 kHz deviation.

COMPOSITE FM S/N RATIO: 75 dB below +/-75 kHz deviation @ 400 Hz (78 dB typical).  Measured in a 30 Hz to 100 kHz bandwidth with 75 microsecond de-emphasis.

COMPOSITE HARMONIC DISTORTION: O.08% or less (.04% typical).

COMPOSITE INTERMODULATION DISTORTION: 0.08% or less (.04% typical).

COMPOSITE TRANSIENT IMD: 0. 1% or less (square wave/sinewave).

COMPOSITE AMPLITUDE RESPONSE: 0.1 dB, 30 Hz to 53 kHz.

COMPOSITE PHASE RESPONSE: +/-0.5 from linear phase, 30 Hz to 53 kHz.

COMPOSITE GROUP DELAY: 390 nanoseconds +/-25 nanoseconds, 30 Hz to 53 kHz.

COMPOSITE SLEW RATE: 12 V/microsecond (symmetrical).

STEREO OPERATION (Thru FM-5A using FS-30 Stereo Generator)

AUDIO INPUT IMPEDANCE: 600 ohms balanced, resistive, floating. (Adaptable to other impedances).

AUDIO INPUT LEVEL: +10 dBm, +/-1 dB for 100% modulation @ 400 Hz. (Adaptable to other input levels).

AUDIO INPUT FILTER: 15 kHz LPF with delay equalization for minimum overshoot.

FREQUENCY RESPONSE: +/-0:5 dB, 30-15,000 Hz, 75 usec pre-emphasis (flat, 25 or 50 usec pre-emphasis selectable).

TOTAL HARMONIC DISTORTION: 0.08% or less, 30-15,000 Hz.

INTERMODULATION DISTORTION: 0.08%, 60 Hz/7 kHz; 4:1 ratio.

TRANSIENT INTERMODULATION DISTORTION: 0.1%(Square wave/sine wave).

FM NOISE: 72 dB or better below 100% modulation @ 400 Hz, 75 usec de-emphasis.

STEREO SEPARATION: 45 dB or better; 30-15,000 Hz (sine wave).

DYNAMIC STEREO SEPARATION: 40 dB or better; 30-15,000 Hz (normal program content).

LINEAR CROSSTALK: Main to Sub/Sub to Main due to amplitude and phase matching of left and right channels, 30-15,000 Hz, 45 dB minimum below 100% modulation.

NON-LINEAR CROSSTALK: Main to Sub/Sub to Main due to distortion products. 70 dB minimum below 100% modulation.

38 kHz SUPPRESSION: 70 dB minimum below  100% modulation.

PILOT STABILITY: +/-0.5 Hz, 0 to 50 c.

MODES: Stereo, Mono L+R, Mono (L) and Mono (R) remote controlled (See FS-30 data sheet for full details).

 

*SCA OPERATION (Thru FM-5A using FC-30 SCA Generator)

MODULATION: Direct FM

SUBCARRIER FREQUENCY: 67 kHz (39 to 95 kHz to order).

SUBCARRIER FREQUENCY STABILITY:

0.5% (330 Hz @ 67 kHz), 0-50C.

SUBCARRIER HARMONIC CONTENT: Less than 0.3%.

SUBCARRIER ENVELOPE DECAY: Greater than 100 msec. from 90% to 10% subcarrier levels.

MODULATION CAPABILITY: 20% of subcarrier frequency.

AUDIO INPUT IMPEDANCE: 600 ohm balanced resistive.

DATA INPUT IMPEDANCE: 75 ohm unbalanced resistive DC coupled.

INPUT LEVELS: (Audio) Adjustable, +10 dBrn to -10 dBrn for +/-6 kHz deviation @ 400 Hz. (Data) Adjustable, 1.0 to 4.0 V p-p for +/-6 kHz deviation (D.C. coupled).

PREEMPHASIS: (Audio) 150 microseconds standard (75 usec with internal jumper). (Data) no-pre-emphasis.

FREQUENCY RESPONSE: (Audio +/-0.5 dB, 10-10,00OHz, exclusive of audio low-passfilter. (Data) +/-0.5dB, dc-10,000 Hz.

AUDIO LOW-PASS FILTER: Sixth order, -3 dB @ 4.3 kHz, standard (resistor changes for other values).

DATA LOW-PASS FILTER: Same as AF filter or may be bypassed.

TOTAL HARMONIC DISTORTION: Less than 0.5% throughout AF pass band.

INTERMODULATION DISTORTION: Less than 0.5%, 6OHz/7kHz; 1:1 ratio (audio pre-emphasis and LPF bypassed).Typical 0.I%.

CROSSTALK, SCA TO STEREO: -60 dB or better below l00% modulation of left or right..75 usec de-emphasis.

CROSSTALK, STEREO TO SCA: -50 dB or better below 6 kHz deviation of SCA using 150 usec de-emphasis and FS-30 stereo generator.

FM NOISE: 72 dB below +/-6 kHz deviation @ 400 Hz (150 usec de-emphasis).

AUTO MUTING LEVEL: Adjustable from 10 to 30 dB below program level.

AUTO MUTING DELAY-.  Adjustable, 0.5 to 10.0 seconds.

(See FC-30 data sheet for full details).