GENERAL
POWER
OUTPUT: 8,000 to 25,000 watts (FCC type-notified range)
FREQUENCY
RANGE: 87.5 to 108 MHz in 50 kHz steps. Tuned to single
frequency.
EXCITATION:
Harris THE-1 High Power FM Exciter
PA Tube: 8990
TYPE OF
MODULATION: Direct carrier frequency modulation (DCFM)
MODULATION
CAPABILITY: ±200 kHz
RF LOAD
IMPEDANCE: 50 ohms
RF OUTPUT
TERMINATION: 3-1/8" EIA flange, female
PA MATCHING
RANGE: 1.7:1 VSWR, maximum for full output power; automatic
power reduction into high VSWR's
RF
HARMONIC/SPURIOUS OUTPUT: Suppression meets or exceeds FCC/DOC/CCIR
specifications
AC INPUT
POWER: 197-250 VAC, 50/60 Hz, three phase, 3-wire closed delta
or 4-wire 360-415 VAG WYE.
POWER
CONSUMPTION: 37.5 kW typical at 25 kW RF output (0.95 PF)
AMBIENT
TEMPERATURE RANGE: -20 to +50°C at sea level; derated 2°C/1000
ft altitude
MAXIMUM
ALTITUDE: 10,000 ft (50/60 Hz)
MAXIMUM
HUMIDITY: To 95% non-condensing
AIR
REQUIREMENTS: Main Cabinet: 760 CFM (60 Hz), 710 CFM (50 Hz);
Power Supply: 250 CFM (60 Hz), 200 CFM (50 Hz) at zero back
pressure
CABINET
SIZE: 33.4"W (85 cm) x 30.2"D (77 cm) x 72"H (183 cm);
Power
Supply: 48"W (122 cm) x 24.1 "D (61 cm) x 60.25"H (153 cm)
WEIGHT/VOLUME: 2,700 Ibs/150 cu. ft., domestic packed
WIDEBAND COMPOSITE OPERATION (STANDARD)
INPUTS:
Two; one balanced, floating and one unbalanced.
INPUT
IMPEDANCE: 2000 ohms resistive.
INPUT
CONNECTORS: Female BNC (rear panel).
INPUT
LEVEL: 1.0 volt RMS nominal for ±75 kHz deviation.
AMPLITUDE
RESPONSE: ±0.1 dB, 30 Hz to 53 kHz; -0.2 dB at 100 kHz.
FM SIGNAL
TO NOISE: 80 dB below 100% modulation (reference 400 Hz at ±75
kHz deviation with 75 microsecond de-emphasis, 20 Hz to 200 kHz
bandwidth).
HARMONIC
DISTORTION: 0.08%
INTERMODULATION DISTORTION: 0.02% (60 Hz/7 kHz 1:1 tone pair).
CCIF
INTERMODULATION DISTORTION: All distortion products below 80 dB
(reference 14 kHz/15 kHz test tone pair).
ASYNCHRONOUS AM SIGNAL TO NOISE: 55 dB below equivalent 100%
amplitude modulation
SYNCHRONOUS
AM SIGNAL TO NOISE: 50 dB below equivalent 100% amplitude
modulation of output carrier with 75 microsecond de-emphasis (FM
modulation ±75 kHz @ 400 Hz).
PHASE
RESPONSE: +0.5/-1.0 degrees from linear phase, 20 Hz to 53 kHz.
TRANSIENT
INTERMODULATION DISTORTION: 0.05%, 2.96 kHz square wave/14 kHz
sine wave modulation.
TEST INPUT
(FRONT PANEL): Nominal 1.0 volt for ±75 kHz deviation at 400 Hz
(10,000 ohm input impedance, BNC female connector)
TEST OUTPUT
(FRONT PANEL): Nominal 1.0 volt for ±75 kHz deviation at 400 Hz
(200 ohm source impedance, BNC female connector)
MONAURAL OPERATION (STANDARD)
AUDIO INPUT
IMPEDANCE: 600 ohms. balanced, resistive, transformerless.
AUDIO INPUT
LEVEL: +10 dBm, ±1 dB for ±75 kHz deviation at 400 Hz.
AUDIO
FREQUENCY RESPONSE: Standard 75 microsecond FCC pre-emphasis
curve ±0.5 dB, 30 Hz-15 kHz. Selectable: flat, 25, 50 or 75
microsecond pre-emphasis.
HARMONIC
DISTORTION: 0.08%, 30 Hz to 15 kHz, de-emphasized.
INTERMODULATION DISTORTION: 0.04%, 60 Hz/7 kHz test tone pair,
4:1 ratio.
CCIF INTER
MODULATION DISTORTION: All distortion products down 70 dB
(reference 14 kHz/15 kHz test tone pair).
TRANSIENT
INTERMODULATION DISTORTION: 0.05%, 2.96 kHz square wave/14 kHz
sine wave modulation
FM SIGNAL
TO NOISE RATIO: At least 80 dB below 100% modulation (reference
400 Hz @ ±75 kHz deviation, measured 20 Hz to 200 kHz band
width, 75 microsecond de-emphasis).
SCAINPUTS (STANDARD)
EXTERNAL
SCA GENERATOR INPUTS: Two
INPUT
CONNECTORS: BNC female (rear panel).
INPUT
IMPEDANCE: 10,000 ohms, unbalanced.
INPUT
LEVEL: 0.1V (nominal) for 10% injection.
RANGE OF
SUBCARRIER FREQUENCIES: 57 kHz to 92 kHz (25 kHz to 92 kHz in
monaural operation).
AMPLITUDE
RESPONSE: +0.1 dB, -0.2 dB; 20 kHz to 100 kHz.
SPECIFICATIONS ARE REFERENCED TO
25 kW
OPERATION, EXCEPT WHEN NOTED
