stc3800 Connor-Winfield VCXOs, stc3800 Datasheet - Page 29

• Manufacturer Part Number: stc3800
• Description: Integrated - Stratum 3e Timing Source
• Manufacturer: Connor-Winfield VCXOs

Performance Specifications continued
time period. This may be due to switching between equipment, reference switching, diagnostics, entry or exit to/from
Hold Over, or input reference transients. The STC3800 performance for reference switches is shown below: (loop
bandwidth =0.098 Hz)
within which the phase locked loop is able to achieve lock and hold lock, respectively. The STC3800 stratum 3 performance
is shown below:
This is the minimum chip capability, and guarantees the ability to capture and lock with a reference that is offset the maximum
allowed in one direction in the presence of an OCXO/TCXO that is offset the maximum in the opposite direction
(4.6 ppm + 4.6 ppm = 9.2 ppm).
Reference switch settling time, and Phase Build-Out resolution performance are shown below:
Phase Transients
Capture Range and Lock Range
Master/Slave Skew, Reference switch settling time, and Phase Build-Out resolution
Characteristic
Capture range
Lock in range
Characteristic
Master/Slave phase skew
Reference switch settling time
Phase Build-Out resolution
10000
1000
100
10
1
0.001
– A phase transient is an unusual step or change in the phase-time of a signal over a relatively short
0.01
© Copyright 2001 The Connor-Winfield Corp. All Rights Reserved
– Capture range and lock range are the maximum frequency errors on the reference input
Preliminary Data Sheet #: TM061
STC3800
< 2 nS
Stratum 3: < 100 sec. up to 20 ppm
frequency offset
1 nS
STC3800
± 50 ppm
± 50 ppm
0.1
Phase Transients – MITE
Observation Time (sec)
GR-1244-CORE, R5-14
1
10
Page 29 of 48
Requirement
N/A
Stratum 3: < 100 sec. up
to +/- 4.6 ppm frequency offset
< 50 nS
Specifications subject to change without notice
– Master/Slave Skew,
Requirement
± 4.6 ppm
N/A
100
Rev: P06 Date: 11/22/04
1000