The 3KW FM transmitter, EM 3000 HE DIG PLUS, has
been created by the OMB center of development for high efficiency transmitters.
It consists on the high efficiency 3KW amplifier, FMA 3000 HE, with 72%
efficiency and the EM 25 DIG PLUS, a 25W FM transmitter. The high efficiency
3-3.5KW amplifier has an approximate consumption of 4200VA at 230Vac, so it pays
for itself in a short period of time due to its low consumption. This 3KW FM
transmitter is also available in Dual Drive version
Product Discription:
MAIN FEATURES OF THE
3KW FM DIGITAL TRANSMITTER MANUFACTURED BY OMB:
- AC Efficiency: 72% (typical
value). RF Efficiency RF: 84% (typical value)
- 4 amplifying modules of
900W with MOSFET technology
- 3 independent switching
power supplies connected in parallel so if there is a failure in any of them
the equipment maintains its operation
- TFT screen and touch
keyboard for the control and visualization of operational parameters.
- Memory registration of
events
- Control of the speed of
cooling fans depending on the temperature at the power modules for
optimizing power consumption and decreasing acoustic contamination
- Advanced protection
against load mismatches without interrupting the transmission and ultra-fast
protection in case of excessive reflected power and input power
- Analog telemetry, digital
RS232 remote control and telemetry, remote control by opened/closed contacts.
- Low pass filter, EMI
filters and internal single-phase transient suppressor
- Automatic power reduction
at night if the amplifier is combined with the EM 25 DIG PLUS
- Automatic power reduction
in case of high temperature, the equipment returns automatically to its
rated power value when the temperature reaches back an average value
- Automatic power reduction
in case of failure of one of the power supplies and in case of excessive
reflected power.
- Automatic voltage control
for efficiency optimization
GENERAL CHARACTERISTICS
|
AMPLIFIER FMA 3000 HE |
|
FREQUENCY RANGE |
87.5-108MHz |
|
INPUT RETURN LOSS |
-20dB |
|
INPUT POWER |
<25W |
|
OUTPUT POWER |
3-3.5KW nominal, manual and automatic adjustable |
|
POWER GAIN |
>21.3dB minimum |
|
TOTAL EFFICIENCY |
>73% typical |
|
RF EFFICIENCY |
84% typical |
|
COOLING |
Forced air, speed control of fans |
|
HARMONICS LEVEL |
-82dBc |
|
INPUT/OUTPUT IMPEDANCE |
50Ω |
|
RF INPUT CONNECTOR |
N(F) |
|
RF OUTPUT CONNECTOR |
7/16"or EIA 7/8" (under request) |
|
RF MONITOR CONNECTOR |
BNC(F) |
|
POWER SUPPLY |
230VAC ±15% → 195 ÷ 265VAC, 50/60Hz |
|
CONSUMPTION |
4200VA (@3000W output power) |
|
PROTECTIONS |
Reflected power, forward power, overdrive, and overcurrent in power
modules. Smart temperature protection. Ultra-fast protection against
reflected and input power. Real time registration of events. Exciters
inhibition |
|
TELEMETRY AND REMOTE CONTROL |
Analog telemetry (direct and reflected power measurements). Digital
telemetry and remote control RS232. Remote control by opened/closed
contacts |
|
OPERATION TEMPERATURE |
-5
to +40°C |
|
WEIGHT |
45Kg approx. (without rack) |
|
DIMENSIONS |
5
standar |
EXCITER EM 25 DIG PLUS
|
| FREQUENCY
RANGE |
87.5-108MHz
|
| FM MODULATION
|
75KHz (adjustable)
peak deviation. Mono 180kF3E and Stereo 256kF3E |
| AUDIO/MPX
INPUT LEVEL |
-3.5 @ +12.5dBm @
75KHz deviation |
| AUDIO INPUT
CONNECTORS |
XLR(F)
|
| AUXILIARY
CHANNEL (RDS/SCA) INPUT LEVEL |
7.5KHz deviation:
-12.5 to 3.5dBm and 2KHz deviation: -24 to -8dBm |
| AUX. CHANNEL
INPUT IMPEDANCE |
10kOhm
|
| MODULATION
DISTORTION |
7.5Khz deviation:
<0.05%, 0.02% typical; 2KHz deviation: <0.2%, 0.05% typical |
| S/N MONO RATIO
|
30 to 20000Hz:
>76dB, 86dB typical, CCIR: >75dB, 81dB typical |
Technical specifications:
| S/N STEREO
RATIO |
30 to 20000Hz:
>72dB, 77dB typical, CCIR: >68dB, 72dB typical |
| AUDIO CHANNELS
BANDWIDTH |
30 to 15000Hz
±0.1dB |
| PRE-EMPHASIS
TIME CONSTANT |
Selectable,
25/50/75 microseconds |
| RF NOMINAL
OUTPUT POWER |
25W |
| TUNING STEPS
OF TRANSMITTER |
10/100KHz
|
| ALC OUTPUT
POWER STABILITY |
±3% |
| SPURIOUS AND
HARMONIC EMISSIONS |
<80dBc
|
| RF OUTPUT
IMPEDANCE |
50Ω |
| RF INPUT POWER
CONNECTOR |
N |
| RF SAMPLING
CONNECTOR |
BNC |
| POWER SUPPLY
|
110-230Vac ±15%
50-60Hz |
| OPERATION
TEMPERATURE RANGE |
0 to 40°C
recommended, -10 to 55°C max. |
| RELATIVE
HUMIDITY |
Up to 95% without
condensation |
| DIMENSIONS
|
484x300x90mm, 2
standard rack units of 19" |
| WEIGHT
|
7Kg |
Levertijd:
5 - 10 werkdagen
