Product manual
100-M0131X1A 02/10/10 11 of 31
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Field R/W Description
BER Pre Viterbi
R
This read-only field conveys the BER (Bit Error Rate) of the
received signal after Read-Solomon (Outer Code) Forward Error
Correction (FEC) processing and before Viterbi (Inner Code) FEC
processing in the receiver chain. Value expressed in 10
-6
.
BER Post Viterbi
R
This read-only field conveys the BER (Bit Error Rate) of the
received signal after performing all error correction techniques in
the receiver chain. Value expressed in 10
-6
. Any numbers greater
than 0 in this field indicate the presence of un-correctable errors
in the received stream and may result in packet errors.
Demod Lock
Status
R
This read-only field indicates that the demodulator is locked onto
incoming RF input signal. Values are locked or not locked.
Packet Errors
R
Indication of the number of packet errors in the TS. Excessive
packet errors will cause picture glitches and artifacts
Table 2 – Link Status Field Definitions
The above fields are only updated once when the control software is first initialized. They
are not updated further unless the Polling Enabled check box is checked, in which case
polling is turned ON continuously.
Under the “Options” menu there is a menu called “Polling Options”. In this window the user
can set the polling interval (in ms)
Note: When making changes to Receiver OFDM parameters, polling should be disabled
to prevent GUI interfering with User changes.
If the Polling Enabled check box is not checked, an Update Status button appears; by
pressing this button the link status parameters are updated (refreshed) each time the
button is pressed.
2.6.3 Configuration Group
The Configuration Group consists of a pull down box in which one of eight configurations
can be selected along with a LOAD button.
The VETA Receiver can store (in memory) 8 configurations. These are pre-configured before
leaving the factory but can be changed by the user. These 8 configurations are also set to
match the transmitter before leaving the factory.
Warning: If a configuration group is changed, it may not match the
transmitter configuration group and the digital link may no longer work. Keep
in mind the receiver and transmitter configuration groups settings must match.
What you should know about configuration groups: