Quick Eagle Networks DL3800E manual UAS only occurs at the onset of 10 SES

	5
	Table 5-3 NET Statistics Items (Continued)
Parameter	Definition
EB/CV	An Errored Block (EB) is a block in which one or more bits are in error. The EB if
	therefore equivalent to the Code Violation (CV) count calculated and displayed in the
	previous versions of the DL3800E. This count allows a user to monitor the rate of EB
	faults on a line that is unavailable.
	EBs are counted in the unavailable state; ES, SES, and BBE are not counted in the
	unavailable state.
ES	An Errored Second (ES) is a one second period with one or more errored blocks
	(such as one or more CRC4 errors) or an Out Of Frame (OOF). This display provides
	the number of ESs that have occurred in the accumulation period. ESs are not
	accumulated during UAS.
SES	Severely Errored Seconds (SES) is a one-second period which contains 30% or more
	errored blocks or at least one severely disturbed period (SDP). An SDP is present if
	either a LOS, AIAS, or LOF occurs.
	Since there are 1000 blocks per second, an SES is a one second period which
	contains either a combination of 300 or more CRC4 errors, an OOF, or at least one
	of the following: LOS, AIS, or LOF. This requirement is a slight change from the prior
	DL3800E unit SES definition, which required 320 or more CRC4 errors or LOS, AIS,
	or LOF. SESs are not accumulated during UAS.
BBE	A Background Block Error (BBE) is an errored block not occurring as part of an SES.
	A BBE is calculated and displayed as a raw count of non-SES EBs. The count is
	updated at the end of every measurement second excepting any second that is an
	SES. The updated count is discarded for all UAS.
UAS	Unavailable Seconds. This display provides the number of UAS that have occurred in
	the accumulation period. At the onset of 10 consecutive SES events, a period of
	unavailable seconds begins. These 10 seconds are part of the unavailable seconds
	count. At the onset of 10 consecutive non-SES events, a new period of available time
	begins. These 10 seconds are part of available time.
	UAS only occurs at the onset of 10 SES.
	ES, SES, and BBE are not counted during unavailable time. Rate parameters ESR,
	SESR, and BBER are the ratio of the fault-seconds count to the total seconds in
	available time.

Front Panel Interface 5-11