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The EM 20/30 is an FM transmitter (87.5~108MHz) externally synthesized with a step of 10KHz, microprocessor controlled and with LCD display for the visualization of transmission parameters (forward and reflected power, deviation level…). It includes fold back protection, Mono/Stereo audio (MPX) input, 3 SCA inputs and telemetry output. User can adjust output Power from 0 to 30W. The EM 20/30  can be supplied with an internal digital stereo generator board (60dB separation).
 

technical features

 

operating frequency range

87.5 ~ 108.0MHz

modulation

FM CLASS F3E, F8E (± 75KHz maximum deviation)

VCO tuning  

25MHz

frequency stability

± 2.0ppm

frequency tuning step

10KHz

RF power output

 0 ~ 30Wrms adjustable

spurious

< - 80dBc

harmonics

< - 70dBc

STEREO CHANNEL SEPARATION

> 55dB / 1KHz

T.H.D. distortion

< 0.1 % / 1KHz (0.08% typical)

BaseBAND FREQUENCY RESPONSE

0.15dB  from 30Hz  to 60KHz

unweighted S/N ratio

> 78dB from 30Hz to 15KHz (Mono input, Pre-emphasis of 50ms)

asynchronous AM S/N ratio

> 65dB Ref. 100 % AM / 400Hz

synchronous AM S/N ratio

> 60dB with FM / 75KHz. / 400Hz

Pre-énphasis

50 or 75ms internally selectable

RF output impedance

50W asymmetrical. N Female Connector

MPX input connector (main program)

BNC Female

stereo input impedance (main program)

High-Z 2KW

SCA input connectors

BNC Female

SCA input impedance

High-Z 2KW

Remote control interface

Serial RS232

cooling

Air forced (Axial blower)

operating temperature range

- 10 ~ + 45ºC

maximum relative humidity

90% (without condensation)

AC power supply

110 ~ 240VAC, 47/63Hz

Dimensions

2RU (19" rack), 410mm depth

weight

4.8Kg (10.56lbs)