BR FM35T, 35 kW, Single Tube FM
Transmitter
Note;
The transmitter you are viewing is a 35A upgraded by BE to 35T in
2001. This transmitter will not have the same color scheme as the
one shown below.
Key Features
- The patented folded half-wave cavity eliminates troublesome
and unreliable DC plate blocking capacitors and all sliding RF
contacts
- True proportional (VSWR) foldback protects the transmitter
under all antenna load conditions
- Advanced transmitter controller design monitors virtually
all operating parameters of the transmitter and facilitates
remote monitoring and full connectivity
- High volume low pressure air flow improves heat transfer
while reducing ambient noise
- Extensive metering of PA parameters eases tuning and
adjustment which allows for more efficient operation as proper
operating parameters can be monitored and maintained
- Complete remote control interface built-in allows for
convenient use of all current remote control systems
- The latest MOSFET technology is used in IPAs
- RTDS (Remote Transmitter Diagnostic System) option available
FM 35T - Technical Specifications
RF
Specs
Output Power:
Range: 35 kW (10 kW to 38.5 kW)
Efficiency: Typically 65% (AC line
input to RF output)
VSWR: 1.8:1 maximum (will operate into
higher VSWR with automatic power reduction)
Impedance: 50 ohm
Frequency:
Range: 87.5 MHz to 108 MHz, tuned to
specific operating frequency, exciter programmable in 10 kHz steps
Stability: ±300 Hz, 0 to 50¡ C
RF Harmonics Suppression: Suppression
meets all FCC/DOC requirements and CCIR recommendations
Modulation:
Type: Direct frequency modulation of
carrier frequency
Capabilities: Greater than ±350 kHz
Regulatory: Meets IEC 215 safety
requirements
FM Audio Specifications with FXi 60
Exciter
Modes: Stereo, mono (L+R), L only, R
only
Stereo:
Connector Type:
AES: Wire Ð XLR, Optical Ð Toshiba (TosLink)
L&R: XLR
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 ohm
Impedance:
AES: 110 ohm balanced
L&R: 600 ohm or 10 kOhm selectable;
balanced
Amplitude Response:
AES: ±0.5 dB, 20 Hz to 15 kHz
L&R: ±0.5 dB, 20 Hz to 15 kHz
THD + Noise:
AES: 0.05% or better
L&R: 0.05% or better
Intermod Dist:
AES: 0.05% or better
L&R: 0.05% or better
S/N Radio:
AES: 82 dB or better below 100%
modulation @ 400 Hz
L&R: 82 dB or better below 100%
modulation @ 400 Hz
Separation:
AES: 50 dB, 20 Hz to 15 kHz
L&R: 50 dB, 20 Hz to 15 kHz
Linear Crosstalk: 45 dB below 100%
modulation; 20 Hz to 15 kHz; main to sub and sub to main
Pilot Stability: ±0.3 Hz, 0¼ C to 50¼
C
38, 57, 76, 95 kHz Suppression: 80 dB
below 100% modulation
Asychronous AM S/N Ratio: 55 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with no FM modulation present
Synchronous AM S/N Ratio: 50 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with FM modulation ±75 kHz at 400 Hz
Pre-emphasis: None, 50 μs, or 75 μs;
software programmable
Composite:
Connector Type: BNC (2); unbalanced,
balanced
Input Level: 3.5 V p-p for 100%
modulation into 10 kOhm
Impedance: Balanced: 10 kOhm or 50 ohm
selectable, Unbalanced: 10 kOhm
Amplitude Response: ±0.01 dB 20 Hz to
53 kHz; 0.1 dB 53 kHz to 99 kHz
Phase Response: ±0.1¼ from linear
phase; 53 kHz to 100 kHz
THD + Noise: 0.02% or less
Intermod Dist: 0.02% or less
S/N Radio: 85 dB below 100% modulation
@ 400 Hz
Asychronous AM S/N Ratio: 55 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with no FM modulation present
Synchronous AM S/N Ratio: 50 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with FM modulation ±75 kHz at 400 Hz
Mono:
Connector Type: XLR
Input Level: 3.5 V p-p for 100%
modulation into 600 ohm
Impedance: 600 ohm or 10 kOhm
selectable
Amplitude Response: ±0.5 dB; 20 Hz to
15 kHz
THD + Noise: 0.02% or less; 20 Hz to
15 kHz
Intermod Dist: 0.02% or less; 20 Hz to
15 kHz
S/N Radio: 85 dB below 100% modulation
@ 400 Hz
Asychronous AM S/N Ratio: 55 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with no FM modulation present
Synchronous AM S/N Ratio: 50 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with FM modulation ±75 kHz at 400 Hz
SCA:
Internal:
Input Level: +10 dB for 10% modulation
into 600 ohm
Impedance: 600 ohm or 10 kOhm
selectable
Amplitude Response: ±0.5 dB; 20 Hz to
7 kHz
S/N Ratio: 60 dB or better
Frequency: 20 kHz to 99 kHz; software
programmable
Deviation: 2.5 to 10 kHz; software
programmable
Injection Level: 2% to 15%; software
programmable
External:
Connector Type: BNC
Input Level: 3.5 V p-p for 10%
deviation
Impedance: 10 kOhm unbalanced
Amplitude Response: ±0.5 dB; 20 Hz to
100 kHz
RDS:
Internal:
Frequency: 57 kHz
Injection Level: 2% to 15%; software
programmable
External:
Connector Type: BNC
Input Level: 3.5 V p-p for 10%
deviation
Impedance: 10 kOhm unbalanced
Amplitude Response: ±0.5 dB; 20 Hz to
100 kHz
19 kHz: 19 kHz synchronization clock
for external RBDS/RDS operation 2.5 V p-p into 50 ohm
FM Audio Specifications with FX 50 Exciter
Composite:
Connector Type: BNC (3); un-balanced,
balanced, front panel test
Input Level: 3.5 V p-p nominal, for
±75 kHz deviation
Impedance: Unbalanced: 10 kOhm,
nominal, resistive. Balanced: 10 kOhm or 50 ohm, programmable,
jumper selected
Amplitude Response: ±0.025 dB, 30 Hz
to 53 kHz
Phase Response: ±0.1 degree from
linear phase, 30 Hz to 53 kHz
THD + Noise: 0.02% or less
Intermod Dist: 0.02% or less
S/N Radio: 85 dB below 100% modulation
@ 400 Hz
Asychronous AM S/N Ratio: 55 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with no FM modulation present
Synchronous AM S/N Ratio: 50 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with FM modulation ±75 kHz at 400 Hz
Mono:
Connector Type: Terminal Block
Input Level: +10 dBm nominal for ±75
kHz deviation @ 400 Hz, adaptable to other levels
Impedance: 600 ohm balanced,
resistive, adaptable to other impedances, 60 dB common mode
suppression
Amplitude Response: ±0.5 dB, 30 Hz to
15 kHz; selectable flat, 25, 50, or 75 μs pre-emphasis
THD + Noise: 0.02% or less
Intermod Dist: 0.02% or less
S/N Radio: 85 dB below 100% modulation
@ 400 Hz
Asychronous AM S/N Ratio: 55 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with no FM modulation present
Synchronous AM S/N Ratio: 50 dB below
rated power reference carrier with 100% AM modulation at 400 Hz, 75
μs de-emphasis with FM modulation ±75 kHz at 400 Hz
SCA:
External:
Connector Type: BNC (3); un-balanced
Input Level: 3.5 V p-p nominal for 7.5
kHz deviation
Impedance: 100 kOhm nominal, resistive
Amplitude Response: ±0.2 dB, 40 kHz to
100 kHz
Mechanical/Physical
Size:
Unpacked: Transmitter: 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:
Unpacked: Transmitter: 1500 lbs. (682
Kg) Power Supply: 1750 lbs. (794 Kg)
RF Output Connector: 3-1/8Ó EIA flange
Heat Dissipation: 16 kW (54,608
BTU/hr) at 35 kW RF output
Air Conditioning Sizing: 4.55 ton A/C
Environmental
Temperature Range: -10¡ to +50¡ C
Altitude: 7500 ft. (2286 M) @ 50 Hz;
10,000 ft. (3048 M) @ 60 Hz
Humidity: 0-95% Non-Condensing
Electrical
AC Input Voltage: 208/240 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 Consumption: 51 kW at 35 kW RF
output
