Wavecom W74PC V8.7.0 - Manual (Page 71)

WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V8.7.0 First start
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Input Parameter Value
Input Name The name of the custom input
Device Select Network in the list
Port number Enter the a port number. The data source must be configured with the same port num-
ber
Format Select VITA-49
Sampling Rate (Hz) The sampling rate used by the data source
Channel In the list box the channel(s) to be used are displayed: Mono, Left, Right, Left +
Right (PCM) and Left & Right (IQ).
VITA-49 Event Tag Size The size (in bits) of the VITA-49 event tag. This parameter is ignored by W-CODE.
VITA-49 Channel Tag
Size
The size (in bits) of the VITA-49 channel tag. This parameter is ignored by W-CODE.
VITA-49 Item Packing
Field Size
The size of the item packing field. This field contains the event tag, the channel tag and
the data item, so the size must be at least (Event Tag Size) + (Channel Tag Size) +
(Data Item Size).
VITA-49 Data Item Size The size of a data item. The data item contains the actual sample data.
VITA-49 Repeat Count The repeat count. It is not supported by W-CODE and should be set to 1 as default.
VITA-49 Vector Size The vector size. W-CODE does not support vectors, so this value should be set to 1 as
default.
VITA-49 Data Sample
Format
VITA-49 supports the following data sample formats:
 Real: Real samples. Each sample consists of 1 data item.
 Complex Cartesian: Each sample consists of 2 data items, which are the real
and imaginary parts of a complex number.
 Complex Polar: Each sample consists of 2 data items, which are the vector
length and the angle of a complex number.
VITA-49 Data Sample
Format
The format of a data item. VITA-49 supports the following data item formats:
 Signed Integer
 Signed VRT (1-6 bits)
 Unsigned Integer
 Unsigned VRT (1-6 bits)
 IEEE 754 Float (32 bits)
 IEEE 754 Double (64 bits)
VRT is a special floating-poiint format of VITA-49, using 1 to 6 bits for the exponent and
the rest for the mantissa. Using VRT instead of one of the IEEE formats can reduce the
amount of TCP/IP data stream, and save streaming bandwidth.
VITA-49 Sample Com-
ponent Repeating
Sample Component Repeating. Not supported by W-CODE.
VITA-49 Link Efficient
Packing
This flag decides if data items should be packed to reduce the data size in some cases.
VITA-49 Stream ID The VITA-49 stream id. Stream IDs are accepted but ignored. No filtering is done.
VITA-49 Radio Link
Packets
Enables the use of VITA-49.1 packets. Those packets, in addition to normal packets,
contain a unique identifier at the beginning and also support a CRC. This makes a VITA-
49 link much more robust.
Note: The VITA-49 parameters are default values. If a matching context packet is received that contains a
data stream format description, those values are overwritten by that context packet.