USER’S MANUAL__________________________________________________________________
86 __________________________________________________________________ M211322EN-D
mode sense command is replaced by the "STAT|" command. The SCSI
write command is replaced by the "WRIT|..." command. You should get
your code working first without using the RDAV command or using
compression.
There is a significant difference between the RVP7 and RVP8/RVP900 in
regards to the FIFO reset command. This is the RVP900 command 0x008C
(see Reset (RESET) on page 307). The RVP900 is unable to read incoming
commands if the output FIFO is entirely full. Therefore, if you put the
RVP900 into continuous output mode, then issue the FIFO reset command
to return to interactive mode, it may hang. We have added special dsp
library support to solve this. To see how we have handled this problem,
look in the source file DspResetFifo.c.
3.4 Digital AFC Module (DAFC)
The Digital AFC Module (DAFC) is a small, self-contained circuit board,
which can passively "eavesdrop" on the RVP900 serial uplink
transmissions. Its purpose is to generate a set of digital AFC control lines
that could be applied, for example, to a custom STALO frequency
synthesizer. A full size (3 in x3.75 in) assembly diagram of the board is
shown in Figure 22 on page 85. It can be installed in the radar system as a
bare board, or packaged into a small metal enclosure. The RVP900 uplink
transmission come from J15 port of the IFDR. A question within dspx
settings sets the function of J15 port between generalized trigger function
or DAFC uplink.
Digital I/O Model – 0:Common, 1:TDWR, 2:WSR88D : 0
Trig–A SMA – 0:Trig1, 1:PBit1, 2:DAFC : 2
Trig–B SMA – 0:Trig2, 1:PBit2, 2:ExtIn : 0
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