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PDF SY01-S3F Data sheet ( Hoja de datos )
| Número de pieza | SY01-S3F | |
| Descripción | SYNCHRONOUS EQUIPMENT OCXO BASED STRATUM 3 CLOCK UNIT | |
| Fabricantes | Raltron Electronics Corporation | |
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SY01-S3F
SYNCHRONOUS EQUIPMENT
OCXO BASED STRATUM 3 CLOCK UNIT WITH A 2ND FREE-RUN
CLOCK OUTPUT – SY01-S3F
Date: April 20 , 2002
• INTRODUCTION
The SY01-S3F is an accurate time and frequency source that has
been designed as a module level subsystem.
The module is designed to work within ATM, SONET, SDH, and
wireless systems where synchronization is vital.
The SY01-S3F is an excellent OCXO based synchronization
solution for Stratum 3 applications with an additional +/-4.6PPM
free-run TCXO.
• FEATURES
A Hardware/Software synchronization solution for timing, jitter and wander concerns in a single module.
Complies with ITU-T Recommendations G.813 and ETSI-ETS 300 462-4 and Bellcore GR-1244-CORE for Stratum
3 applications.
Supports four modes of operation: Locked to Reference 1, Locked to Reference 2, Holdover and Free-run.
Accepts reference inputs from two independent sources from 8 kHz to 77.76 MHz.
Provides two outputs up to 77.76 MHz.
Provides a secondary free-run output within +/-4.6PPM
Loop filtering utilizing application specific software in the digital signal processor (DSP).
Continuously monitors and evaluate input reference signals.
Creates a history buffer for Holdover mode operation.
Alarm and status signal.
Host interface and JTAG port.
Small dimensions of 1.80X1.80X 0.65 inch (open pkg)
• APPLICATION
The SY01-S3F performs clock regeneration as a Synchronous Equipment Clock (SEC), or STRATUM 3 in ATM, SDH,
PDH, and SONET networks. It is designed for manufacturers of network equipment, especially Access Switches, Core
Switches, Cross Connects, Digital Multiplexers-Exchangers, and SDH/SONET equipment. The unit is also suitable for
PCS, WLL, and Wireless Base Stations. Wherever a Timing unit with high performance specifications is required, the
SY01-S3F can be integrated into the network system and provide all necessary frequencies and interfaces. The input
stage can receive two different input reference signals at various rates from 4 kHz to 77.76 MHz. An optional
application can be achieved by integrating the SY01-S3F with a low cost GPS receiver and locking it to the GPS 1
pps output signal.
RALTRON ELECTRONICS CORP. § 10651 N.W.19th St § Florida 33172 § U.S.A.
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SYNCHRONOUS EQUIPMENT
OCXO BASED STRATUM 3 CLOCK UNIT WITH A 2ND FREE-RUN
CLOCK OUTPUT – SY01-S3F
• PIN ASSIGNMENT
On the picture below it is shown the pin-out for the SY01-S3F. The design is done in such a way that is can support
basically any other pin-out without changes in the hardware. For other pin-out requirement please contact the Raltron.
+5V
EX REF1
GND
EX REF 2
GND
OPT OUT
GND
OUT
GND
18
17
16
15
14
13
12
11
10
1 HOLDOVER
2 REF 1
3 REF2
4 FREERUN
5 GND
6 ALARM OUT
7 CNT 1
8 CNT 2
9 PLL UNLOCK
Figure 4 – Bottom view
Pin #
1
2
3
4
6
7
8
9
5,10,12,14,16
18
11
13
17
15
Name
Description
HOLDOVER Holdover Signal -> the output is high when the unit is in holdover mode
REF 1
Reference 1 Signal -> the output is high when the unit is using the reference 1
REF 2
Reference 2 Signal -> the output is high when the unit is using the reference 2
FREERUN Free-run Signal -> the output is high when the unit is in the free run mode
ALARM OUT
Alarm signal -> the output is high when there is an alarm in the module, alarm
condition is during free-run mode, holdover mode,
CNT 1
Control Input 1 -> the external input for selecting mode of the unit – see table.
CNT 2
Control Input 2 -> the external input for selecting mode of the unit – see table.
PLL UNLOCK
PLL Unlocked Signal -> the output is high when the unit is not locked to any of the
references
GND
Ground
+5V Positive Voltage Supply
OUT
Synchronized Output -> the output of the synchronized signal, for frequency
range see table below.
OPT OUT
Optional Output -> the secondary output of the synchronized signal, for frequency
range see table below.
EX REF 1
External Reference 1 Input -> the input signal from reference 1
EX REF 2
External Reference 2 Input -> the input signal from reference 2
For other pin-out configurations contact the factory!
RALTRON ELECTRONICS CORP. § 10651 N.W.19th St § Florida 33172 § U.S.A.
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