FM modulator(Exciter)

MODEL: GME3F31

Specifications:The GME3F31 FM radio exciter meets the standards for monaural broadcasting, stereo broadcasting, Supplementary Program (SCA) broadcasting, and Radio Frequency Data (RDS) broadcasting specified in GB/T 4311-2000 Technical Specification for Meter Wave FM Broadcasting, and all indicators meet the requirements of GY/T 169-2001 Technical Requirements and Measurement Methods for Meter Wave FM Broadcasting Transmitters.

Standard: FM

Frequency:  87MHz~108MHz wideband

Outputpower:≥30w

Product introduction:This FM Modulator(Exciter) has a simple structure, excellent performance, stable operation, easy maintenance, and the following outstanding features:
1) The motherboard adopts a brand new direct RF output architecture with excellent performance, simple and fast frequency hopping, and good frequency consistency throughout the entire FM frequency band.
2) The exciter adopts a brand new full broadband loop scheme, which has precise power detection (power detection error ± 10%, typical value ± 5%) and loop control function throughout the entire frequency band.

Overview

 1) The maximum output power of the exciter is 30W; 

2) Supports the following FM radio operating modes: 

a) Single tone broadcasting; 

b) Stereo broadcasting; 

c) 3D vocal cord additional program playback;

 d) FM data broadcasting. 

3) Supports a working frequency range of 87MHz~108MHz;

 4) Support FM synchronous network function; 

5) Support manual and automatic switching between internal reference clock and external 10M reference clock;

 6) Support analog L/R input, 2-channel AES/EBU input, manual and automatic switching; 

7) Support AES/EBU monitoring output;

 8) Supports SCA/RDS input and 19kHz pilot output; 

9) Supports three power control modes: manual, small loop, and large loop; 

10) The monitoring, alarm, and automatic protection functions are as follows: AES/EBU input: interrupt; Reference clock: Fault, turn off RF; Overheating temperature: turn off RF; Overload or other abnormalities during the operation of the small loop: power reduction; Overload, exceeding the manually set threshold, or other abnormalities occurring during the operation of the large loop: power reduction 

11) Supports front panel touch screen control and RS232/485 control; 

12) Support automatic/manual switching between the main excitation machine and the backup excitation machine. 

Dimensions

482.6mm(L)*480mm(W)*88.2mm(H)(2U)

Weight

8.5kg

Ambient Temperature

0℃~45℃

Relative Humidity

≤95%

Atmospheric Pressure

86kPa~106kPa

General indicators

Output power

0~30W

Frequency

87~108MHz,1Hz步进

Frequency Accurate

±1Hz

Frequency stability

10-6(Internal reference)

1010(external reference)

Residual radiation

<-65dB

Parasitic AM noise

<-60dB

Pilot frequency deviation

±0.05Hz

38kHz residual component in S signal

<-60dB

Modulation frequency offset

0~100kHz;(Max 150kHz)

Pre-emphasis

0   50us   75us

Monophonic Broadcasting

Signal-to-Noise Ratio

>80dB(RMS,50us加重去重,75kHz频偏)

Frequency Response

±0.05dB(无加重,无去重)

±0.1dB(50us加重,50us去重)

Distort(THD+N)

<0.05%

Stereo broadcasting

Signal-to-Noise Ratio

>80dB(RMS,50us aggravation,  deduplication,75kHz频偏)

Frequency Response

±0.05dB(No aggravation, no deduplication)

±0.1dB(50us aggravation,50us deduplication)

Distort(THD+N)

<0.05%

Separation degree of left and right channels

>65dB

Power Supply

170~240V AC,50~60Hz

RF Output

50Ω,0~30W

RF Monitor

50Ω,<RF Output -30dBc

L/R Audion Input

600Ω Balance,Max  8dBu

AES/EBU Input

110Ω Balance

SCA/RDS Input

10kΩ Imbalance,Max 4Vpp

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KEEP IN TOUCH WITH US

 

E-mail:dygme@163.com

Add:  No. 21 Shuiyuan West Road, Liandong U Valley Science and Technology Park, Miyun District, Beijing, China