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NAUTEL FM 10, Solid State, FM Transmitter Specifications

 

General

Configuration: 6 Power Modules and

6 Switching Regulators 1 IPA Module and IPA Switching Regulator

Power Output: 5,000- 11,000W

RF Frequency Range: 87.5-108.0 MHz,

tuned to specific operating frequency

RF Terminating lmpedance: 50 ohms

unbalanced, 3-l/8 inch EIA flange, female

VSWR: 1.5:1 (automatic power reduction into high VSWR) Output level stabilized against

moderate VSWR's (1.1:1)

RF Harmonics/Spurious Output:

Exceeds FCC/DOC/CCIR requirements

Excitation: NAUTEL NE50 Exciter.

Frequency Stability: 250Hz, OC to

50"C ambient temperarure range.

Modulation Type: Direct Digital

Synthesis using a 32 bit NCO

(numerically controlled oscillator)

Modulation Capability: 150% (x7 5kJIz

reference standard)

Asynchronous AM S/N Ratio: 65dB

minimum below reference carrier with

100% amplitude modulation using 75ųs

de-emphasis (no FM modulation present)

Synchronous AM S/N Ratio: 50dB

below reference carrier with 100%

amplitude modulation at 400Hz with

75ųs de-emphasis.

AC lnputVoltage: 208 VAC, 3-phase,

50/60Hz 380 VAC, 3-phase, 50/60Hz

200-250VAC, single phase, 50/60Hz

Power Consumption: (typical) 15.4kW

at 10 kW out (15.7kVA)

Power Factor:0.98

Power Line Harmonics: IEEE 519-1992

Overalf Efficiency: 65% typical rf out

to ac in

Ambient Temperature: 0 to 5OC

(derate 3C per 500m, 2C per 1000 ft.

above sea level)

Altitude: Up to 4000 meters (13,000 ft)

Humidity Range: Up to 95o/o non-condensing

Airflow: 1300 cfm

Size: Centimeters 81.25W x 105D x

186H, Inches 32W x 41.5D x 73.5H

0.85 sq.me.,9.22 sq ft of floor space

Weight: 544 kg, 1200 lbs.

Stereo Performance with Digital lnput Module (Standard)

lnput Connector: Two total; one XLR

female, one optical input receiver

XLR lnput lmpedance: 110 ohms, nominal

lnput Level: -4.0dB full scale reference, factory programmed

Data Format: AES/EBU (reference

standards; AES5- 1984, ANSI S4.28-1984,

AES3-1985, ANSI S4.40-1992 and AES3-1992)

Data Rate: Any in range 25kHz to 55kHz

(32, 44.1 or 48kHz typically)

Digital Stereo Generator: The digital

input module generates the composite

stereo baseband signal from the left and

right digital audio present in the AES/EBU data

Pre-Emphasis:0, 25, 50 or 75ųs, locally selectable

Pilot Carrier: 19kHz 0.1Hz. 9% injection level, factory programmed. Locally selectable on or off. Available on rear panel BNC jack, as TTL or lvpp sine for RBDS operation.

38kHz Suppression: 80dB below 75Hz deviation reference

Stereo Separation: Better than 60dB, 30Hz to 15kHz

Amplitude Response (L or R): 0.2dB,

30Hz to 15kHz, referenced to 0dB at 400Hz

FM Signal to Noise Ratio (L or R): 80dB

below 100% modulation (Reference 400Hz, measured in a 22Hz to 22kHz bandwidth with 75ųs de-emphasis and DIN ‘A’ weighting)

Stereo Total Harmonic Distortion (L or R): 0.025% or less, 30Hz to 15kHz, measured in 22Hz to 22kHz bandwidth with 75ps de-emphasis

lntermodulation Distortion (L or R):

CCIF: 0.008% or less (14/15kHz 1:1); SMPTE: 0.025% or less (60 and 7000Hz 1:1)

Transient lntermodulation Distortion (DlM) (L or R): 0.05% or less (2.96kHz square wave/l4kHz sine wave)

Stereophonic Crosstalk: 60dB below 100% (30Hz- 15kHz) modulation reference: L+R to L-R and L-R to L+R

Stereo/Monaural Mode Control: Local

control. Configures the digital audio

receiver to accept both L and R (Channel

A and B) in stereo mode or L only

(Channel A) in monaural mode

Backup Analog Composite Mode:

Local/Remote control. Disables digital

stereo generator and reconfigures digital

input module to accept analog composite

stereo on existing composite input

connector located on rear panel. All SCA

inputs remain valid.

 

Monaural Performance with Digital lnput

Module

FM Signalto Noise Ratio: 90dB below

100% modulation (Reference 400H2 at

75kHz deviation with 75ųs de-emphasis

and DIN ‘A’ weighting in a 22Hz to 22kHz

bandwidth)

Harmonic Distortion: 0.005% or less 30Hz

to 1 5kHz (22H2 to 22kHz bandwidth with

75ųs de-emphasis)

 

Wideband Composite Operation with

Analog lnput Module

lnputs: One balanced (floating BNC jack),

one unbalanced (BNC jack), one unbalanced front panel test input (BNC jack)

lnput lmpedance: Balanced – 10k ohm

selectable, Unbalanced - 10k ohm

lnput Level: 3.5V p-p nominal for 75kHz deviation

Amplitude Response: 0.05dB 30Hz to 53kHz

FM Signal to Noise Ratio: 90dB below 100% modulation (Reference 400Hz at 75kHz deviation with 75ųs de-emphasis and DIN ‘A’ weighting 20Hz to 80kHz bandwidth)

Harmonic Distortion: 0.005% or less at

400Hz measured in a 22Hz to 80kHz

bandwidth with 75ųs de-emphasis

CCIF lntermodulation Distortion: 0.009%

or less (15kHz/14kHz 1:1 ratio)

SMPTE lntermodulation Distortion:

0.015% or less (60Hz/7kHz 1:1 ratio)

Transient lntermodulation Distortion:

0.015% or less (2.96kHz square wave/14kHz sine wave)

Composite Phase Response: 0.5 from

linear phase 30Hz to 53kHz

Stereo Separation: Better than 50dB, 30Hz

to 15kHz when measured in conjunction

with a high quality stereo generator and

demodulator

 

Monaural Performance with Analog lnput

Module

lnput lmpedance: 600 ohms balanced, resistive, transformerless

lnput Level: 10 dBm nominal for 75kHz deviation at 400Hz (adjustable)

Frequency Response: 0.5dB (30Hz to

15kHz) selectable flat, 25, 50, or 75ųs pre-emphasis

FM Signal to Noise Ratio: 90dB below

100% modulation (Reference 400Hz at

75 kHz deviation with 75ųs de-emphasis and DIN ‘A’ weighting in a 22Hz to 22kHz bandwidth)

Harmonic Distortion: 0.005% or less at 400Hz measured in a 22Hz to 22kHz bandwidth with 75ųs de-emphasis

CCIF lntermodulation Distortion: 0.009%

or less (15kHz/14kHz 1:1 ratio)

SMPTE lntermodulation Distortion:

0.015% or less (60Hz/7kHz 1:1 ratio)

Transient lntermodulation Distortion: 0.015% or less (2.96kHz square

wave/14kHz sine wave)

 

SCA (RBDS/RDS) Performance

lnputs: 3 Unbalanced (BNC jack)

lnput lmpedance: 10K ohm

lnput Level: 2.8V p-p nominal for 7.5kHz deviation

Amplitude Response: 0.5dB 20kHz to

100kHz

Subcarrier Frequency Range: 57kHz to

92kHz (25kHz to 92kHz monaural)

 

Analog Backup Operation with Digital

lnput Module

lnput Connector: One unbalanced (BNC jack)

lnput lmpedance: 10K ohm

lnput Level: 3.5V p-p nominal for 75kHz

deviation

Amplitude Response: 0.2dB, 30Hz to 53kHz

FM Signal to Noise Ratio: 85dB below 100% modulation (Reference 400Hz at 75kHz deviation with 75ųs de-emphasis and DIN ‘A’ weighting 20Hz to 80kHz bandwidth)

Harmonic Distortion (plus noise): 0.02%

or less, 30Hz to 53kHz, measured in 22Hz to 80kHz bandwidth with 75ųs de-emphasis

Stereo Separation: Better than 38dB, 20Hz

to 15kHz when measured in conjunction

with a high quality stereo generator and

demodulator.

CCIF lntermodulation Distortion: 0.009%

Or less (15kHz/14kHz 1:1 ratio)

SMPTE Intermodulation Distortion: 0.02%

or less (60Hz/7kHz 1:1 ratio)

Transient Intermodulation Distortion: 0.015% or less (2.96kHz square wave/14kHz square wave/14kHz sine wave)