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EM 20/30 FM transmitter
EM 20 30 eciter
An FM transmitter (87.5~108MHz) externally synthesized with a step of 10 KHz, microprocessor controlled
With LCD display for the visualisation of transmission parameters (forward and reflected power, deviation level).
It includes:
Fold back protection,
Mono/Stereo audio (MPX) inputs,
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 (60 dB separation).
Technical

operating frequency range

87.5 ~ 108.0MHz

modulation

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

VCO tuning 

25 MHz

frequency stability

±2.0ppm

frequency tuning step

10 KHz

RF power output

0 ~ 30Wrms adjustable

spurious

< - 80dBc

harmonics

< - 70dBc

STEREO CHANNEL SEPARATION

> 55dB / 1 KHz

T.H.D. distortion

< 0.1 % / 1 KHz (0.08% typical)

Base BAND FREQUENCY RESPONSE

0.15dB  from 30 Hz  to 60KHz

unweighted S/N ratio

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

asynchronous AM S/N ratio

> 65dB Ref. 100 % AM / 400 Hz

synchronous AM S/N ratio

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

Pre-Emphasis

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 2 kW

SCA input connectors

BNC Female

SCA input impedance

High-Z 2 kW

Remote control interface

Serial RS232

cooling

Air forced (Axial blower)

operating temperature range

- 10 ~ + 45șC

maximum relative humidity

90% (without condensation)

AC power supply

110 ~ 240 VAC, 47/63 Hz

Dimensions

2 RU (19" rack), 410 mm depth

weight

4.8Kg (10.56lbs)

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