Specifications - Promax MO-170 Manual De Instrucciones

Modulador cofdm dvb-t
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1.3 Specifications

INPUTS
MPEG-2 Transport Stream
Operating modes
Master
Slave
IF OUTPUT
Type
Frequency range
Spectrum polarity
Power level (average)
In-band amplitude ripple
In-band group delay ripple
Frequency stability
Out-of-band spectral
1
characteristics
@ ± 3.805 MHz
@ ± 4.25 MHz
@ ± 5.25 MHz
Level of harmonics and spurious ≤ -50 dBc
2
MER
1
Frequencies are referred to the central frequency for an 8 MHz channel. Peak levels measured using a 10 kHz
bandwidth are referred to the carriers located on either side of the spectrum. Values shown are the worst case and
correspond to guard intervals of 1/32.
Value measured in master mode. In slave mode, the MER is greater than 38 dB for 8 MHz channels, and around 35
2
dB for 7 and 6 MHz.
Page 4
Two DVB-ASI inputs, 75 Ω female BNC
One DVB-SPI input, LVDS DB-25
TS packets of length 188 or 204 bytes
(automatic detection)
Support for burst and continuous packet mode
Input TS bit rate strictly below the value given in
the DVB-T specification
Packet stuffing for bit rate adaptation and PCR
re-stamping are carried out automatically
Input TS bit rate constant and equal to the
value given in the DVB-T document (no
stuffing). Tolerance ±0.1l
50 Ω BNC female connector
Variable between 31 and 36 MHz in steps of 1
Hz; fixed at 36 MHz when RF output is off
Selectable via front panel controls
0 dBm (107 dBµV) fixed
< 0.5 dB
<10 ns
20 ppm
0 dBc
-39 dBc (2k), -47 dBc (8k)
-52 dBc
> 40 dB
USER'S MANUAL. MO-170
12/2006

Capítulos

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