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Technical Specifications

 

FM 30T - Technical Specifications

Nov 23, 2017

RF Specs

Output Power:
Range30 kW (7.5 kW to 30.0 kW)
EfficiencyTypically 65% (AC line input to RF output)
VSWR1.8:1 maximum (will operate into higher VSWR with automatic power reduction)
Impedance50 ohm
Frequency:
Range87.5 MHz to 108 MHz, tuned to specific operating frequency, exciter programmable in 10 kHz steps
Stability±300 Hz, 0 to 50° C
RF Harmonics SuppressionSuppression meets all FCC/DOC requirements and CCIR recommendations
Modulation:
TypeDirect frequency modulation of carrier frequency
CapabilitiesGreater than ±350 kHz
RegulatoryMeets IEC 215 safety requirements

STXe 60 Exciter Audio Specifications

General
RF Power Output5-66W
Output Impedance50 ohms nominal
VSWRRated power into 1.5:1 VSWR. Open and short circuit protected at all phase angles
Frequency Range87.5MHz to 108MHz; 10kHz increments
Frequency StabilityInternal TCXO: +/-100Hz factory calibration, +/-4ppm agin/temp, -10 degrees C to +50 degrees C; External Input: +/- accuracy of reference source
Audio InputsAES, L&R analog, Unbalanced composite, SCA audio inputs, RDS input
Modulation TypeDirect-to-channel digitally generated FM (no analog up-conversion); FM only
Modulation CapabilityUp to 300kHz
Asynchronous AM S/N Ratio75dB below rated power reference carrier with 100% AM modulation at 400Hz, with no FM modulation present.
Synchronous AM S/N Ratio60dB below rated power reference carrier with 100% AM modulation at 400Hz, with FM modulation +/- 75kHz at 400Hz
Spurious and Harmonic: 85dB or better typical, low pass filter standard
AC Input90 to 264VAC; 47-63Hz
Power Factor0.99 typical at 110VAC, 0.95 typical at 220VAC
AC Inputs TestingTested to EN 301 489-1, including Voltage Dips and Dropouts (Section 9.7B), Voltage Surges (Section 9.8), and conducted immunity and conducted radiation
RegulatoryFCC; IC; CE; BETS-6; IEC 215 Safety
Operational ModesStereo, mono (L+R), L only, R only
Stereo:
Connector Type:
AESWire – XLR
L&RXLR
Input Level:
AES-2 dBfs for 100% modulation; 16-24 bits (32, 44.1, 48 or 96 kHz typical rates for AES/EBU devices)
L&R +10 dBm for 100% modulation into 600 ohms
Impedance:
AES110 ohm balanced
L&R600 ohms or 10 k selectable; balanced
Amplitude Response:
AES±0.25 dB, 20 Hz to 15 kHz
L&R±0.25 dB, 20 Hz to 15 kHz
THD + Noise:
AES0.03 or better @400Hz measured 10 Hz-22Khz, 75 uS deemphasis
L&R0.005 typical @400Hz, measured 10 Hz-22Khz, 75 uS deemphasis
S/N Ratio:
AES95dB typical below 100% modulation @ 400Hz, 10Hz-22Khz bandwidth,A-weighted filter 100dB typical below 100% modulation @ 400 Hz, 10Hz-22Khz bandwidth, CCIR-468 filter
L&R86dB or better below 100% modulation @ 400Hz, 10 Hz-22Khz bandwidth, unweighted
Analog93dB typical below 100% modulation @ 400Hz, 10Hz-22Khz bandwidth,A-weighted filter 98dB typical below 100% modulation @ 400 Hz, 10Hz-22Khz bandwidth, CCIR-468 filter
S/N Ratio Stereo:80dB or better below 100% modulation @ 400Hz, unweighted
Stereo Separation:70dB or better, 20HZ to 15kHz
AES80 dB, 20 Hz to 15 kHz
L&R70 dB, 20 Hz to 15 kHz
Pilot Stability±0.3 Hz, 0º C to +50º C
Audio Overshoot:150% peak deviation max.
Composite Performance:
Connector TypeBNC Unbalanced: BNC
Input Level3.5 V p-p for 100% modulation into 10 kOhms
ImpedanceBalanced: 10 kOhm or 50 ohm selectable, Unbalanced: 10 kOhm
Amplitude Response±0.03 dB 20 Hz to 53 kHz; 0.1 dB 53 kHz to 99 kHz
Phase Response±0.1º from linear phase; 53 kHz to 100 kHz
THD + Noise0.005% or less @ 400Hz, 10-22Khz bandwith, 75 us deemphasis
Intermod DistSMPTE: 0.01% or less (60/7000 Hz, 1:1 ratio) DIM-B: 0.005% typical (14Khz)
FM S/N Radio88 dB below 100% modulation @ 400 Hz, 10Hz-22Khz bandwidth, unweighted
FM S/N Ratio95dB typical below 100% modulation @ 400Hz, 10Hz-22Khz bandwidth, A-weighted filter
FM S/N Ratio100dB typical below100% modulation @ 400 Hz, 10Hz-22Khz bandwidth, CCIR-468 filter
SCA/SCA2/RDS:
Air Conditioning Sizing5.41 ton A/C
Impedance10k ohms unbalanced
Amplitude Response+/- 0.1dB; 53Hz to 100kHz
19kHz Output19kHz synchronization clock for external RBDS/RDS operation 1V pp into high impedance
Physical:
Height3.5 inches (2 RU)
Width19" EIA rack mountable
DepthSTXe 60 19.5 inches
WeightSTXe 60 20lbs. unpacked

Mechanical/Physical

Size:
UnpackedTransmitter: 56.5” W x 31.5” D x 70” H (143.5 W x 80 D x 177.8 H cm) Power Supply: 34.5” W x 31/5” D x 70” H (87.6 W x 80 D x 177.8 H cm)
Weight:
UnpackedTransmitter: 1500 lbs. (682 Kg) Power Supply: 1750 lbs. (794 Kg)
RF Output Connector3-1/8” EIA flange
Heat Dissipation14 kW (47,782 BTU/hr) at 30 kW RF output
Air Conditioning Sizing3.98 ton A/C

Environmental

Temperature Range-10° to +50° C
Altitude7500 ft. (2286 M) @ 50 Hz; 10,000 ft. (3048 M) @ 60 Hz
Humidity0-95% Non-Condensing

Electrical

AC Input Voltage208/240 V Delta or WYE, 50/60 Hz, three phase. (Taps for 196 to 252 V, other voltages and line frequencies are available upon request)
Power Consumption44.0 kW at 30 kW RF Output

All Specifications Subject to Change Without Notice


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