Technical Specification
Instruction Manual: evolution 5000 E5500 Mobile Contribution Encoder
Page B-11
ST.TM.E10033.3
Table B.18: IF OUT MAIN Specification
Item
Specification
Safety status:
SELV
Connector designation:
IF OUT MAIN
Connector type:
BNC, female 75
Ω
Output impedance:
75
Ω
Return loss:
>18 dB, 35 < f < 105 MHz
Output power:
–20 to +5 dBm in 0.1 dB steps
Power level stability:
±
0.5 dB
Signal type:
QPSK per EN 300 421
Symbol-rate (minimum)
0.46875 Msymbol/s
Fc (MHz)
50-60
60-80
80-90
Symbol rate (maximum) vs
carrier frequency Fc:
Symbol-rate
Msymbol/s
Fc – 30
30
110 – Fc
Transmit symbol-rate accuracy:
Within 15 ppm
Convolutional FEC rates:
1/2, 2/3, 3/4, 5/6 and 7/8
Bit-rate (204 byte format:
2 x Rs x FEC Mbit/s
where
Rs = Symbol-rate (Msymbol/s)
FEC = FEC ratio (values listed above)
Power spectrum:
Square root raised cosine,
α
= 0.35 per EN 300 421
Power spectrum (detail, nominal):
Bandwidth/Rs ratio (BW/Rs) at power spectral density Co values (dB)
relative to the power spectral density Coo at the carrier (center)
frequency:
Co-Coo (dB) BW/Rs
-3 1.0
-6 1.13
-10 1.21
-20 1.32
-30 1.37
Carrier frequency Fc:
50 – 90 MHz
Carrier frequency step:
125 kHz
Carrier frequency accuracy:
Within
±
7.5 kHz
Carrier suppression:
>40 dB
IF spectrum inversion:
Selectable on/off
Residual carrier, carrier OFF
state:
< -70 dBm
Spurious outputs, modulated
carrier:
< -60 dBc/4 kHz relative to unmodulated carrier, 0 < f < 500 MHz
excluding
±
1.06
×
Symbol Rate about the carrier frequency
Spurious outputs, unmodulated
carrier
< – 50 dBc
< - 55 dBc typical
0 < f < 500 MHz, each component
Carrier phase noise:
Phase noise density (dBc/Hz) Frequency offset from carrier
< –85 100 Hz
< –85 1 kHz
< –95 10 kHz
< –110 100 kHz
Transmission modes:
Modulation on/off
Carrier on/off
