STM-S3E Datasheet, PDF (6/16 Pages) List of Unclassifed Manufacturers – Stratum 3E Timing Module

Functional Truth Table
Table 8
CNTLB CNTLA
0
0
0
0
0
1
0
1
0
1
Mode
Free Run
Free Run
Reference #1
Reference #1
Reference #1
Status1Status0 Alarm
0
0
1
0
0
1
0
1
0
0
1
1
0
1
0
RFL
0
1
0
0
1
LOR
0
0
0
0
0
PBO
0
0
0
0
0
0
1
Reference #1
0
1
0
0
1
0
0
1
Reference #1
0
1
0
0
0
1
0
1
Reference #1
0
1
1
0
0
1
1
0
Reference #2
1
0
0
0
0
0
1
0
Reference #2
1
0
1
0
0
0
1
0
Reference #2
1
0
0
1
0
0
1
0
Reference #2
1
0
0
0
1
0
1
0
Reference #2
1
0
0
0
0
1
1
0
Reference #2
1
0
1
0
0
1
1
1
Hold Over
1
1
1
0
0
0
1
1
Hold Over
1
1
1
1
0
0
Condition
Normal Operation
Unit is in Fast Acquire mode
Output freq. is 15 ppm or more
from Free Run mode freq.
Selected reference signal is not
detected and unit is in pseudo-
Hold Over*
Phase build-out is occuring on
selected reference
Phase build-out is occuring and
has continuously occurred for at
least 0.4 seconds and the unit is
in pseudo-Hold Over*
Normal Operation
Unit is in Fast Acquire mode
Output freq. is 15 ppm or more
from Free Run mode freq.
Selected reference signal is not
detected and unit is in pseudo-
Hold Over*
Phase build-out is occuring on
selected reference
Phase build-out is occuring and
has continuously occurred for at
least 0.4 seconds and the unit is
in pseudo-Hold Over*
*Psuedo-Hold Over is a condition when the module is no longer tracking a reference and is holding the last output that was sent to
the Sync_Out pin. Variations in the output frequency are due only to the drift of the OCXO.
Preliminary Data Sheet #: TM012 Page 6 of 16 Rev: P06 Date: 05/20/ 02
© Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice