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PDF IQCM-300 Data sheet ( Hoja de datos )
| Número de pieza | IQCM-300 | |
| Descripción | OCXO | |
| Fabricantes | IQD | |
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ISSUE 1; February 2016
Description
High Holdover Capability PTP, 1588 Clock Module.
Designed to provide easy-to-use holdover capability for GPS
receivers. Ideal protection against deliberate or accidental
GPS jamming and weather-related outages
Applications include Base Station, Clock Source, Clock Server
and IP Backhaul
Supports IEEE 1588V2,can be1588 master or slave
Holdover stability up to 1.5µs over 24hours, achieved using an
adaptive algorithm.
Internal parameters of the algorithm, including maintenance
alarms and messages are available to the user via serial
interface.
Working States (Reference Drawing):
Run1: Fast track. Adjust the OCXO 10MHz output frequency
quickly to track the 1PPS to 10MHz with 1PPS reference.
Run2: Slow track. Adjust the OCXO 10MHz output frequency
slowly when phase error is in the defined range.
Holdover: No 1PPS input present; an algorithm enables
adaptive modelling of the frequency stability of an OCXO with
reference to the GPS timing signal.
Free Run: Clock module powered up with no 1PPS input.
Note1: The IQCM-300 should be left powered and running for 7
days minimum before operation to allow for the OCXO's
internal drift to stabilise.
Note2: The adaptive module algorithm can be built after two
days operation with good GPS signal, however this data will be
lost at power down.
System Mode
SYS_MODE0 SYS_MODE1 Operation
pin17
pin21
0 0 Combined PTP & Phy Layer Timing
0 1 SGMII/Ethernet self test port 0
1 0 SGMII/Ethernet self test port 1
1 1 Restor factory defult setttings
Frequency Parameters
Frequency
10.0MHz
10MHz RF Output Details, Pin 18:
HCMOS Compatible, 15pF load
VoH: 2.7V min
VoL: 0.4V max
Rise and Fall time: 8ns max
Duty Cycle: 45/55% max
Accuracy (24-hour averaging when locked to 1PPS): ±1E-12
Short Term Stability (tested after power for 1hr ref to 25°C, 1s,
using PN9000 test equipment): 5E-12 max
Ageing (Vs and temperature constant, reference to T=25°C, Vs
= 5.0V and after 30 days operation): ±0.2ppb per day, ±10ppb
per year
24Hrs Holdover capability vs temperature change
±1.5µs max
ΔT<±5°C during holdover period
Reference 7 days powered on, 3 days GNSS lock
Temperature varied <1°C/min within operating temperature
range
OCXO Specification
IQCM-300
Outline (mm)
Working States Diagram
Sales Office Contact Details:
UK: +44 (0)1460 270200
Germany: 0800 1808 443
France: 0800 901 383
USA: +1.760.318.2824
Printed on 26 Apr 16 10:47 using Model Data Sheet V1.2550
Email: [email protected]
Web: www.iqdfrequencyproducts.com
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