Moseley Associates Inc 08MUD1F ユーザーズマニュアル
1-7
System Description
602-13729-01 Rev B
Expedio Digital Electronic News Gathering Radio
providing field upgrade capability. A Windows-based PC interface is available for connection at
the rear panel DATA port.
the rear panel DATA port.
1.5.2 COFDM Modulator / IF Upconverter
A S I to S P I
Convertor
DV B -A S I
I/P
FE C
Reed S olom on
Interleaver
V iterbi
M apping
M odulation
Invers e
FFT
2K
DA C
B P Filter [9M Hz]
&
G ain c ontrol
9M H z
IF
Control
Lines
Co
nt
ro
ro
l f
rom
Hi
ta
Hi
ta
c
h
i
C O FD M M O D U LA TO R
Figure 6: COFDM Block Diagram
The COFDM (Coded Orthogonal Frequency Division Multiplex) Modulator is the transmit portion
of the card. The unit also houses the IF Upconverter.
of the card. The unit also houses the IF Upconverter.
The COFDM Modulator accepts the aggregate data stream via the DVB-ASI Port on the rear
panel (see Figure 6 above).
panel (see Figure 6 above).
The modulated signal is provided via low IF of 9MHz which is converted ---------------