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Technical Specifications

 

FM 4C - Technical Specifications

Mar 27, 2014

RF Specs

Output Power:
Range2 kW to 4 kW
Accuracy10%
Resolution10 W
PA Efficiency81% typical at 4 kW (actual dependent on line voltage and carrier frequency)
Overall AC Efficiency64% typical at 4 kW (actual dependent on line voltage and carrier frequency)
VSWRRated power into 1.35:1 maximum, capable of operating into higher VSWR with automatic power reduction, open and short circuit protected at all phase angles
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 500 Exciter Audio Specifications

General
RF Power Output25-550W
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 Ratio64dB 75dB 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 Factor0.95 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:
Unpacked30.64” W x 64” H x 30” D (77.83cm W x 162.56cm H x 76.2cm D)
Weight:
Unpacked525 lbs (238 kg)
Airflow:
Outlet Size672 square inches (4362 square cm); top, back and front of unit
RF Output Connector1-5/8” EIA flange

Environmental

Temperature Range0 degrees C to +50 degrees C
Altitude10,000 ft. (3048 M) @ 60 Hz. 7500 ft. (2286 M) @ 50 Hz
Humidity0-95% Non-Condensing

Electrical

AC Input Voltage
3 Phase, Closed Delta:196-252 VAC, 50/60 Hz
3 Phase, 4 wire, WYE:339-437 VAC, 50/60 Hz
Single Phase:196-252 VAC, 50/60 Hz
Disconnect Size70 A Single Phase; 50 A Three Phase
AC Wire Size#4 Copper AWG Type THHN Single Phase; #6 Copper AWG Type THHN Three Phase
Current Draw50 A Max Single Phase; 30 A Max Three Phase
Power Consumption8 kW at 4 kW RF Output into 50 Ohm load
Cooling Air Requirements2200 CFM (62.3 M3/min) filter required
Heat Dissipation4 kW at 4 kW RF output into 50 Ohm load
BTU13680 BTU/H at 4 kW RF output into 50 Ohm load
Power Factor0.99 at full load
Surge Protection275 V MOV

All Specifications Subject to Change Without Notice


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