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EM250 Dig FM TRANSMITTER  

EM 250

A 250W FM transmitter, microprocessor controlled, that allows a lot of applications like power level control at nights to save energy, and the complete monitoring and adjusting of several parameters of the equipment (input level, deviation, etc.).

 

EM 250 COMPACT DIG includes a 300 high-efficiency amplifier and a restrictive 7-order filter.
The switching power supply allows stable output power with input voltage from 90 to 260 VAC. EM 250 COMPACT DIG can be supplied with an internal digital stereo generator board (60 dB separation).
Technical
Audio
 
S/N Ratio (30 ~ 20000hz)
 

Mono

≥78dB (86dB typical)

Stereo

≥72dB (77dB typical)

Weighted S/N Ratio (Ccir)

 

Mono

≥75dB (81dB typical)

Stereo

≥68dB (72dB typical)

T.H.D. Distortion (Limiting Threshold Adjusted At 150 KHz Deviation)

75 KHz Deviation

<0.05% (0.02% typical)

150 KHz Deviation

<0.2% (0.05% typical)
Stereo Channels Crosstalk (L / R)

 
With External Encoder

<-50dB
With Internal Encoder (100 ~ 5000hz)

<-60dB
With Internal Encoder (30 ~ 15000hz)

<-50dB
Audio Input Frequency Response

 
30 Hz ~ 15 KHz (Pass Band)

±0.1dB
F >19 KHz (Rejected Band)

> 50dB
Stereo Input (MPX) Frequency Response

±0.1dB from 10 Hz to 100 KHz
Aux. Input (SCA/RDS) Frequency Response 

±0.2dB from 10 KHz to 100 KHz
Input Levels   

 
Audio And MPX (At ?75 KHz Deviation)

-3.5 ~ +12.5dBm adj.
SCA/RDS (At ?7.5 KHz Deviation)

-12 ~ +3.5dBm adj.
SCA/RDS (At ?2 KHz Deviation)

-24 ~ -8dBm adj.
Input Impedance   

 
Audio And MPX

10KΩ  balanced and 600Ω unbalanced (selectable)
Auxiliary SCA/RDS

10KΩ
Connectors   

 
Audio

XLR Female
MPX, Auxiliary (SCA/RDS)

BNC Female
Common Mode Input Rejection (20 ~ 15000hz)

>50 dB (>60 dB typical)
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