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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
CNTLB CNTLA
Mode
Status1Status0 Alarm
RFL
LOR
PBO
Condition
0
0
Free Run
001000
0
0
Free Run
001100
0
1
Reference #1
010000
Normal Operation
0
1
Reference #1
011000
Unit is in Fast Acquire mode
0
1
Reference #1
010100
Output freq. is 15 ppm or more
from Free Run mode freq.
0
1
Reference #1
010010
Selected reference signal is not
detected and unit is in pseudo-
Hold Over*
0
1
Reference #1
010001
Phase build-out is occuring on
selected reference
0
1
Reference #1
011001
Phase build-out is occuring and
has continuously occurred for at
least 0.4 seconds and the unit is
in pseudo-Hold Over*
1
0
Reference #2
100000
Normal Operation
1
0
Reference #2
101000
Unit is in Fast Acquire mode
1
0
Reference #2
100100
Output freq. is 15 ppm or more
from Free Run mode freq.
1
0
Reference #2
100010
Selected reference signal is not
detected and unit is in pseudo-
Hold Over*
1
0
Reference #2
100001
Phase build-out is occuring on
selected reference
1
0
Reference #2
101001
Phase build-out is occuring and
has continuously occurred for at
least 0.4 seconds and the unit is
in pseudo-Hold Over*
1
1
Hold Over
111000
1
1
Hold Over
111100
Functional Truth Table
Table 8
*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.