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USER’S MANUAL MO-180
1. NAK: An internal device connected to the I2C bus does not respond to
messages from the modulator’s central control unit. This type of error is for
Promax internal reference. If it occurs repeatedly, the unit should be taken to a
Service Centre.
2. SFN ERROR STATUS: This corresponds to a problem in the modulator when
working in SFN mode. It would typically refer to synchronisation losses or errors
in the MIP packet that should be embedded in the input transport stream to
achieve perfect SFN synchronisation.
3. UNLOCKED STATUS: It covers all the other scenarios in which the modulator’s
circuitry is working OK but other error events have been detected (e.g. sync
losses or non-compliant TS inputs).
SFN ERROR STATUS
The display format for this type of error is as follows:
When this type of errors occur, the MO-180 presents an error message on the
LCD display starting with the word STATUS and followed by an explanation of the type
of error. Under these circumstances, the ERROR LED flashes red for 5 seconds, and
then stays lit until Clear Errors under the STATUS menu is set to YES.
The numerical fields above have the following meaning:
XX Hex number whose bits X7X6X5X4X3X2X1X0 have the following meaning:
Bits
Active
X7 … X3
−
Description
Should be always 0
ACTION: Not required
NLPD overflow
X2
01/2008
1
When the NLPD block is used, this bit flags
the occurrence of mathematical overflows
within the NLPD block. This is usually caused
because the correcting gain is outside the
valid range or because the crest factor of the
OFDM signal is greater than 11 dB. ACTION:
NLP overflow should be avoided at all costs
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English
ERRnn SFN ERROR STATUS: XXYYZZ