18 /87
3
TECHNICAL SPECIFICATIONS
RF FEATURES
RF Output impedance
50
Ω
unbalanced
Frequency range
87.5 to 108 MHz
Frequency control
Synthesizer
µ
processor controlled
Off-lock attenuation
> 75 dBc (typical -80 dB)
Type of modulation
F3E / F8E direct FM at the carrier frequency
Modulation mode
Mono, Stereo, Multiplex, SCA, RDS, AUX (input selected by front
panel)
Frequency deviation
±75 kHz =100 %, ±150 kHz capability (others on request)
Reference
VCTCXO 10 MHz ± 1ppm or 10 MHz external (Optional)
Constancy of freq. dev.
±1 % over six months
Variation of freq.
± 1ppm/year
Short term stability
± 1 ppm from -5 to +45
°
C
Instantaneous BW
>20 MHz
RF harmonics
Exceeds EBU/CCIR/FCC requirements > -75dBc
RF spurious
Exceeds EBU/CCIR/FCC requirements < -100 dBc @ ± 1 MHz min.
out of carrier (typical -110dB)
Pre-emphasis
Flat/50/75µs selectable via front panel
Pre-emphasis precision
Nominal 1% (typical 0.4% )
Stereo operation
CCIR 450/S2 "pilot tone system"
STEREO OPERATION
1.
Audio response
±
0.3 dB da 20 Hz to 15 kHz
2.
Audio filter attenuation
>
55 dB @ 19 kHz, >45dB 19 to 100kHz
3.
Common mode rejection
20 Hz to 15 kHz
>
45 dB
4.
Stereo Separation
30-80Hz >53dB (typ. 56), 80Hz-15kHz >60 dB (typ.70)
5.
Crosstalk attenuation (M / S)
>
40 dB 30 Hz to 15 kHz (typ. 52dB / 400Hz to 5kHz)
6.
Spurious products
>
53 kHz
>
50 dB
7.
38 kHz suppression
>
70 dB (Typ -85dB)
8.
Subcarrier frequency
38 kHz
±
2 Hz
9.
Subcarrier generation
Internal crystal
10.
Pilot frequency
19 kHz
±
1 Hz
11.
THD+N on encoded channels
<
0.03 % 30 Hz TO 15 kHz ( typ -75dB)
12.
Nominal pilot deviation
±
7 kHz
MONO OPERATION
Audio response
±
0.3 dB 20 Hz to 15 kHz (+0/-2%)
THD+N on encoded channels
30 Hz to 15 kHz
<
0.06% ( typ. 0.03 % ) typ. -78dB
