Harris FM35K, 35KW FM Transmitter
POWER OUTPUT:
10
kw-35 kw (FCC type notified range).
PA EFFICIENCY:
80%
minimum (14 kw to 35kw).
FREQUENCY
RANGE:
88 MHz-108 MHz
(Tuned to single frequency).
RF LOAD
IMPEDANCE:
50 ohm.
RF OUTPUT
TERMINATION:
31/8” EIA
female flanged.
PA MATCHING
RANGE:
1.7:1 VSWR.
RF OUTPUT
SPURIOUS AND HARMONIC:
Meets or
exceeds FCC requirements.
AC LINE
VOLTAGE:
208-240 VAC,
50/60 Hz, 3-phase, WYE or closed -delta or 360-415 VAC, 50/60 Hz,
3-phase, 4-wire.
TRANSFORMER
TAPS:
208V, 24OV, (VERNIER:
-10V, 0V, +10V.)
PRIMARY POWER
CONSUMPTION:
Typically 52.2
kw (.95 PF) @ 35 kw.
INLET AIR:
PA:
1650 CFM, HVPS 500 CFM.
SIZE AND
WEIGHT
MAIN
TRANSMITTER CABINET-
Height 72 in.,
Width 33.5 in., Depth 33.5 in., Weight 600 lbs.
HIGH VOLTAGE
POWER SUPPLY-
Height 60.2
in., Width 52 in., Depth 26 in., Weight 1900 lbs.
AMBIENT
TEMPERATURE:
0ºC-50ºC.
ALTITUDE:
10,000 ft.
maximum, maximum temperature decreases 2ºC per 1,000 ft. to 30ºC.
HUMIDITY:
0-95%
non-condensing.
WIDEBAND
COMPOSITE OPERATION
COMPOSITE
INPUT:
One balanced
floating input.
COMPOSITE
INPUT IMPEDANCE:
2000 ohms
resistive.
COMPOSITE
INPUT CONNECTOR:
Female BNC.
COMPOSITE
INPUT LEVEL:
1.0
volt RMS nominal for +75 kHz deviation.
EXTERNAL SCA
GENERATOR INPUTS:
Up to two
unbalanced inputs (optional).
COMPOSITE FM
SIGNAL TO NOISE:
80 dB
below 100% modulation (reference 400 Hz @ +75 KHz deviation
with 75 microsecond de-emphasis, 20 Hz to 200 KHz bandwidth).
COMPOSITE
HARMONIC DISTORTION:
.08%.
COMPOSITE
INTERMODULATION DISTORTION:
.02% (60 Hz/7
KHz 1:1 tone pairs).
COMPOSITE CCIF
INTERMODULATION DISTORTION:
All distortion
products below 80 dB (reference 14 KHz/15 KHz test tone pair).
COMPOSITE
AMPLITUDE RESPONSE:
+0.1
dB, 30 -Hz-53 KHz.
ASYNCHRONOUS
AM SIGNAL TO NOISE:
55 dB below
reference carrier with 100% AM modulation @ 400 Hz, 75
microsecond de-emphasis. (No FM modulation present).
SYNCHRONOUS AM
SIGNAL TO NOISE:
50 dB below
referenced carrier with 100% AM modulation @ 400 Hz, 75
microseconds de-emphasis. (FM modulation ±75 KHz deviation @ 400
Hz).
MONAURAL
OPERATION
AUDIO INPUT
IMPEDANCE:
600 ohms,
balanced, resistive, transformerless, adaptable to other impedances.
INPUT FILTER:
Controlled response low pass filter, defeatable.
AUDIO INPUT
LEVEL:
+10 dBm
+1 dB for 100% modulation 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:
0.15%, 30 Hz
to 15 KHz de-emphasized.
INTERMODULATION DISTORTION:
0.1%,
60 Hz/7 kHz test tone pair, 4:1 ratio.
CCIF
INTERMODULATION DISTORTION: All distortion products down 70
dB (reference 14 KHz/15 KHz test tone pair).
FM SIGNAL TO
NOISE RATIO:
80 dB below
100% modulation (reference 400 Hz @ +75 KHz deviation,
measured 20 Hz to 200 KHz bandwidth, 75 microsecond de-emphasis).
STEREO
OPERATION
TYPE OF
MODULATION:
Digitally
Synthesized Modulation (DSM).
AUDIO INPUT
IMPEDANCE:
Left and right
channels: 600 ohms, balanced, resistive, transformerless, adaptable
to other impedances.
AUDIO INPUT
LEVEL:
±10
dBm, ±1 dB for 100% modulation.
AUDIO
FREQUENCY RESPONSE:
(Left and
right) standard 75 microsecond FCC pre-emphasis curve +0.5
dB, 30 Hz-15 kHz. Selectable: flat, 25 or 50 microsecond
pre-emphasis.
INPUT
FILTERING:
15 KHz low
pass filter, 45 dB rejection at 19 kHz.
OVERSHOOT
PROTECTION:
Harris
patented Dynamic Transient Response (DTR) filter. Defeatable for
test purposes.
AUDIO
TRANSIENT RESPONSE:
2% maximum
overshoot beyond steady state.
HARMONIC
DISTORTION:
(Left or
right) 0.2% or less, 30-15,000 Hz.
INTERMODULATION DISTORTION:
(Left or
right) 0.12% 60 Hz/7 KHz tone pair, 4:1 ratio.
CCIF
INTERMODULATION DISTORTION: (Left or right) all distortion
products down 75 dB (reference 14 kHz/15 kHz test tone pair).
STEREO
SEPARATION:
50 dB, 30
Hz-15 KHz; typically 60 dB at midband frequencies.
DYNAMIC STEREO
SEPARATION:
48 dB under
normal programming conditions.
LINEAR
CROSSTALK:
-50 dB.
NON-LINEAR
CROSSTALK:
-60 dB.
76 KHz
SUPPRESSION:
-68 dB.
38 KHz
SUPPRESSION:
-73 dB.
FM NOISE:
(Left or right) 72 dB minimum below 100% modulation. Reference: 400
Hz, 75 microsecond de-emphasis, +75 KHz
deviation, measured 30 Hz to 15 KHz bandwidth.
PILOT
OSCILLATOR:
Crystal
controlled.
PILOT PHASE:
Harris patented automatic pilot phasing circuit.
PILOT
STABILITY:
19 KHz +1
Hz 0º to 50ºC.
OPERATIONAL
MODES:
Stereo, mono
(left and right), mono (left), mono (right) - remoteable.
SCA OPERATION
MODULATION:
Direct FM.
FREQUENCY OF
OPERATION:
67 or 92 kHz
programmable, any frequency between 25 and 92 KHz on special order.
FREQUENCY
STABILITY:
+500
Hz.
MODULATION
CAPABILITY:
+7.5
kHz.
AUDIO
FREQUENCY RESPONSE:
67 KHz and
92KHz AC coupled inut, 150 microsecond pre-emphasis +1 dB,
standard. Selectable flat, 50 or 75 microsecond pre-emphasis. DC
@coupled input: No pre-emphasis: DC to 4 KHz +0.5 dB.
AUDIO INPUT
IMPEDANCE:
600 ohms
balanced (AC coupled). Also 2000 ohms DC coupled unbalanced input
through rear BNC connector.
AC INPUT
LEVEL:
+10dBrn, +1
dB for 100% modulation at 400 Hz@ 600 ohms.
DC INPUT
LEVEL:
1.0
volt peak for 5 KHz deviation.
INPUT
FILTERING:
Programmable
LPF, 4.5 KHz standard. 3 KHz, 5 KHz, 7.5 KHz selectable. Low pass
filter defeatable.
HARMONIC
DISTORTION:
0.5%, 30-4,
500 Hz +5 KHz deviation.
INTERMODULATION DISTORTION:
1%, 60 Hz/7
KHz, 1:1 ratio (audio low pass filter and pre-emphasis bypassed).
FM NOISE:
(Main channel not modulated) -63 dB (reference: 100% modulation =
+5 kHz deviation at 400 Hz).
CROSSTALK:
(SCA
to main or stereo sub-channel) -60 dB or better.
CROSSTALK:
(Main or stereo sub-channel to SCA) 57 dB below +5KHz
deviation of SCA with mono or stereo channels modulated by
frequencies 30 Hz-15 KHz, SCA demodulated with 150 microsecond
de-emphasis.
CROSSTALK:
SCA
to SCA (67 kHz/92 kHz) -50 dB demodulated with 150 microsecond
de-emphasis.
AUTOMATIC MUTE
LEVEL:
Variable from
0 to -30 dBm.
MUTE DELAY:
Adjustable 0.5 to 20 seconds.
INJECTION
LEVEL:
1% to
30% of composite level (adjustable).
CARRIER MUTE
DECAY:
Greater than
30 milliseconds.
EXCEPT WHEN
NOTED, SPECIFICATIONS ARE REFERENCED TO 35 kW OPERATION.
|
