Low Power Broadcast 30W FM Transmitters Radio
NEURAL

High Efficiency DDS Frequency Modulation & Dinamic RDS Radio Station Equipment
SFN Single Frequency Network-WEB TCP/IP Telemetry

TX-DDS Exciter/Transmitter is a Family of DDS Direct to Channel Digital FM stereo Exciters/Transmitters that guarantees a superior transmission quality and top performances.
Output power from 30 W to 1200W using High Efficiency last LDMOS technology is housed into an ultra-compact cabinet of only 2U heigh.
TX-HE is available also in JPN and OIRT frequencies.
TX-HE can be used as ultra-compact stand alone station, as well as driver in complex high power transmitters and N+1 systems.
For any application TX-DDS is the ultimate solution that meets most demanding customer’ requirements and guarantees professional features at affordable price.

TECHNICHAL CHARACTERISTICS

EXCITER 30W TO 1200W ANALOG HE AND DIGITAL DDS SERIES
Frequency Range: 87.5 ÷ 108.00 MHz, Programmable in 10 KHz steps
On request 66 ÷ 74 MHz (OIRT), 76 ÷ 90 MHz (JPN) Bands.
Frequency Stability: better than ±150Hz from -10 to +50°C
Max deviation: +/-150kHz.
Reference: TCXO 12.8 MHz. Can be synchronized by 1-2-2.5-5-10 MHz self select external clock (optional).
Frequency Control: Synthesizer μprocessor control.
EPower Output: 30W, 50W, 100W, 150W, 300W, 600W, 1200W. Adjustable from 0W to maximum power.
Output Impedance: 50 ohm.
Display: forward/reflection power and modulation indicator
Type of Modulation: Direct frequency modulation of carrier frequency, F3E Stereo with Subcarrier and Mono.
Lock in Time: Typ. 4 second.
Off Lock Attenuation: ≥ -80 dBc.
Modulation Capability: ±150 KHz.
Modulation Mode: Mono, Stereo, Multiplex, SCA, RDS, Aux.
Preemphasis: Flat(0)/50/75 μs selectable from front panel.
Asynchronous AM S/N Ratio: -60 dB below reference carrier with 100% AM modulation @ 400 Hz, without FM modulation.
Synchronous AM S/N Ratio: -60 dB below reference carrier with 100% AM modulation@ 400 Hz with FM modulation ±75 KHz @ 400 Hz.
RF Harmonics: Exceeds ETSI/EBU/CCIR/FCC requirements.
better than 84 dbc
RF Spurious: Exceeds ETSI/EBU/CCIR/FCC requirements.
better than 84 dbc
Output Connectors: 30W to 600W N type connector, 1200W DIN 7/16 type connector Output power on/off and adjustable from front panel and remotely.
Overall Efficiency up to 80%.
Monitor RF: -60 dBc, BNC connector
VSWR: 1.5:1 Maximum with automatic fold-back at higher VSWR

MONAURAL OPERATION

Audio Input Impedance: 600 ohm balanced, 15 Kohms unbalanced.
Audio Input Level: -12 to +12 dBm. (Other range on request)
Input Connector: XLR female.
Audio Frequency Response: ±0.15 dB, 30 Hz to 15 KHz.
Total Harmonic Distortion + Noise: 0.03% @ 400 Hz
Intermodulation Distortion: 0.03%, 1 KHz/1.3 KHz, 1:1ratio
Transient Intermodulation Distortion: 0.03%, 2.96KHz square wave and 14 KHz sine wave.
FM S/N Ratio: -89 dB RMS detector, -85 dB below ±75 KHz deviation, 50 μs de-emphasis, weighted.

MULTIPLEX OPERATION

Composite Input Impedance: 5 Kohm unbalanced.
Composite Input Level: 3.5Vp-p for ±75KHz deviation.
Input Connector: BNC female.
Composite Amplitude Response: : ≤ ± 0.1dB, from 30Hz to 53kHz
Total Harmonic Distortion + Noise: 0.03% @ 400 Hz
Intermodulation Distortion: 0.03%, 1 KHz/1.3 KHz, 1:1 ratio
Transient Intermodulation Distortion: 0.03%, 2.96 KHz square wave and 14 KHz sine wave.
FM S/N Ratio: -89 dB RMS detector, -85 dB below ±75 KHz deviation, 50 μs de-emphasis, weighted.

STEREO OPERATION

Audio Input Impedance: 600 ohm balanced, 15 Kohm unbalanced.
Audio Input Level: -12 to +12 dBm.
Input Connector: XLR female.
Audio Frequency Response: ±015 dB from 30 Hz to 15 KHz.
Total Harmonic Distortion + Noise: 0,03% @ 400 Hz
Intermodulation Distortion: 0,02%, 60Hz /7kHz 4:1 ratio +4dBu
Transient Intermodulation Distortion: 0.03%, 2.96 KHz square wave and 14 KHz sine wave.
FM S/N Ratio: -85 dB RMS detector, -82 dB below ±75 KHz deviation, 50 μs de-emphasis, weighted.
Stereo Separation: 30÷80 Hz ≥ -53 dB, 80Hz÷15 KHz ≥ -65 dB (Typ. 70 dB).
Crosstalk attenuation: Main to Sub -55 dB 30 Hz to 15 KHz
38 KHz Suppression: ≥ -70 dB (typ. -85 dB).
Pilot Frequency: 19 KHz ± 1 Hz
Phase Pilot: ± 2° adjustable
Output Pilot: 1 Vpp., BNC female
Audio Filter Attenuation: ≥ -55 dB @ 19 KHz, > -45 dB 20 KHz to 100 KHz.
Modes: Stereo, Mono L+R, Mono L, Mono R. AES/EBU OPERATION
Input Level: -10dBfs to 0dBfs
Input Connector: XLR female, optical TOS-LINK.
Input Impedance: 110 ohm.
Data Format: S/PDF,AES/EBU, IEC958, EIAJCP340/1201.
D/A Converter: 24 bit.
Sampling Frequency: from 32 to 96 KHz with automatic selection
Stereo separation (crosstalk): ≥50dB,100Hz to 5kHz
Amplitude response: ≤ ± 0.1dB, from 30Hz to 15kHz
FM S/N Ratio: -85 dB below ±75 KHz deviation, 50 μs de-emphasis, weighted.

SCA, RDS, AUX OPERATION

Input Connector: BNC female
Input Impedance: 3 Kohm.
Input Level: -3 to +6 dBm.
Frequency Response: ±0.2 dB, 40 KHz to100 KHz.
Input Connector: BNC female. Most SCA, RDS, AUX, performance parameters are determined primarily by the generator used.

AUXILIARY CONNECTIONS

USB: connector Type B female front panel.
N°2 RS485: Serial Interface connector RJ45 back panel.
Telemetry Interface: connector DB25F back panel.
External Clock: connector SMA female (optional).

OPTIONS

External clock: for PLL synchronization purpose 1-2-2.5-5-10 MHz external r eference oscillator with self selection of the incoming frequency.
DOUBLE EXCITER WITH AUTOMATIC CHANGEOVER SYSTEM
SNMP TELEMETRY INTERFACE
GSM AND PSTN TELEMETRY
TCP/IP TELEMETRY INTERFACE
SINCH-MODULE FOR SFN APPLICATION
OIRT & JPN VERSION
DIGITAL AUDIO INPUTS
LPFM CODE STATION:FCC IDENTIFICATION CODE
RDS CODER : EASY PROGRAMMABLE BY PC
SCA Encoder
Digital Composite 192kHz Input
ELECTRICAL (for 10kW to 40kW Transmitter)
AC Input Power: 230/400 VAC ±15%, 50/60 HZ(+/- 3HZ) single phase or 3-phase+N
Power factor > 0.99
Cooling: Forced air
MTBF > 20.000 Hours

ENVIRONMENTAL

Operating temperature: -10°C to +50°C.
Max Operating Altitude: 4000 mt.
Relative Humidity Range: 0 to 95% non condensing.
Protection against Lightening, Dust and Corrosion
PHYSICAL DIMENSIONS (For typocal 10kW Transmitter)
Mounting: 2 unit cabinet
Size: 88mm. (H) x 484mm. (W) x 478mm. (D)
Weight: ~ 11 Kg.