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Outputs, If outputs (1u, e5714), B.3 outputs – TANDBERG E5714 User Manual

Page 245

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Technical Specification

Instruction Manual: evolution 5000 E57xx DSNG and DENG Voyager Encoder

Page B-9

ST.TM.E10076.3

B.3

Outputs

B.3.1

IF Outputs (1U, E5714)

Table B.12: IF OUT MAIN Specification (1U, E5714)

Item

Specification

Safety status:

SELV

Connector designation:

IF OUT MAIN

Connector type:

BNC, female 75

W

Output impedance:

75

W

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,

a = 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 (centre)
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
< –83 100 Hz
< –85 1 kHz
< –95 10 kHz
< –110 100 kHz

Transmission modes:

Modulation on/off
Carrier on/off

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