OMB EM 100 DIG - 1.4 Technical specifications

FM Transmitter
Sistemas Electrónicos S.A EM 100 DIG
Technical Manual - v1.2 - November 2005 12
1.4 Technical specifications.
SIGNAL TO NOISE RATIO Monaural
>78dB. typical 86dB from 30 to 20,000Hz.
Stereophonic
>72dB. typical 77dB from 30 to 20,000Hz.
CCIR WEIGHTED S/N Monaural
>75dB. typical 81dB
Stereophonic
>68dB. typical 77dB
HARMONIC DISTORTION
1
For ± 75KHz dev:
<0.05%. typical 0.02%
For ±150KHz dev:
<0.2%. typical 0.05%
STEREO CROSSTALK w/External Encoder: <-50dB
w/Internal Encoder.From 100 to 5000Hz: <-60dB
w/Internal Encoder.From 30 to 15000Hz: <-50dB
PROGRAM AUDIO CHANNEL FREQUENCY RESPONSE
FROM 30 TO 15000 HZ
± 0.1dB
ATTENUATION AT AUDIO FILTER REJECTION BAND (F
=19KHZ)
>50dB
DEVIATION LIMITER THRESHOLD Adjust.between 0 and +7dBm
STEREO MULTIPLEX INPUT FREQUENCY RESPONSE.
FROM 10HZ TO 100KHZ
±0.1dB
AUXILIARY INPUT FREQUENCY RESPONSE .
FROM 10 TO 100KHZ
±0.2dB
MAINS SUPPLY REQUIREMENTS 115 /230VAC ± 15%.50/60Hz
POWER CONSUMPTION AT 250 WATTS RF OUTPUT LEVEL 250VA / 200W
OPERATING TEMPERATURES RANGE 0 ~+35ºC recomm.
-10 ~ +45º C max.
MOUNTING DIMENSIONS (W/O HANDLES) Width:19" height: 5 1/8".Standard 19" Rack.
DIMENSIONS 483 mm width x 125 mm height x 334 mm depth.
MODULATION Frequency, ± 75KHz. peak dev.
MODULATION CLASS F3E, F8E.
OSCILLATOR'S SYNTHESIS STEPS 10 /100KHz
FREQUENCY ERROR <±200Hz
FREQUENCY DRIFT <250Hz over temperature <100Hz/year.
RF OUTPUT POWER adjustable between 2 and 100Wrms. nominal.
MAXIMUM ALLOWABLE REFLECTED RF POWER 10W
RF HARMONIC PRODUCTS < -70dBc
RF SPURIOUS PRODUCTS <-80dBc. typical -95 dBc.
RF OUTPUT IMPEDANCE
50: unbalanced.N Female connector.
AUDIO /MULTIPLEX INPUT LEVEL Adjustable between -3.5 and +12.5dBm for ±75KHz
peak dev.
AUDIO /MULTIPLEX INPUT IMPEDANCE
Select. 10K: /600:,bal./unbal.
COMMON MODE INPUT REJECTION FROM 20 TO
15000HZ
>50 dB.typical >60dB
AUDIO INPUT CONNECTORS XLR Female balanced
SCA/RDS CHANNEL INPUT LEVEL ±7.5KHz dev. Adjust. between -12.5 and +3.5dBm
±2.0KHz dev. adjustable between -24 and -8dBm
SCA/RDS CHANNEL INPUT IMPEDANCE
10 K: unbal.BNC Female conn.
MODULATION OUTPUT LEVEL 0 to +10dBm at ±75KHz peak dev.
PRE-EMPHASIS TIME CONSTANT Variable 0 /50 /75µsec.± 2%.
1
: Limiter set to 150KHz deviation threshold.