IQCM-140 OCXO Specification
■A GPS disciplined Oven Controlled Crystal Oscillator (OCXO) with a 1PPS input. 1PPS output and 10MHz output.
■Key Feature - Holdover Stability Options:
▲80μS/24hrs, △T=±5°C, 24hrs holdover after turn on 3 days and lock 2 days. Time to maintain ±1 5μs: 3-4hrs typical.
▲20μs/24hrs, △T=±5°C, 24hrs holdover after turn on and lock 7 days. Time to maintain ±1.5μs: 6-7hrs typical.
▲80μs/24hrs. △T=±5°C, 24hrs holdover after turn on and lock 2hrs. Time to maintain ±1.5μs: 3-4hrs typical.
■Working States (Reference Drawing):
▲Run 1: Fast track. Adjust the OCXO 10MHz output frequency quickly to track the GPS
▲ Run2: Slow track. Adjust the OCXO 10MHz output frequency slowly when phase error is in the defined range.
▲Holdover: No GPS 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 GPS input.
●Frequency Parameters:
■Frequency:10.0MHz
■Frequency Stability:±5.00ppb
■Frequency Stability: TA varied across the operating temperature range, measurement referenced to frequency observed with fref=(fmax+fmin)/2, Vs=3.3V, load= 15pF and temperature variable speed less than 2°C/min.
■Short Term Stability (temperature stable, no EMI/EMC or other interference, tested after power for 1hr ref. to 25°C; 1s):
▲±0.1 ppb max
■Accuracy (24hrs average when locked to 1PPS after power on 2 days): ±10ppt max
■Warm Up (TA=25°C and Vs=3.3V constant, measurement referenced to 10MHz, after power on 5mins with GPS lock): ±1 ppm max
■Ageing (constant measurement referenced to frequency observed with TA=25°C, Vs=3.3V and after 30 days of operation):
▲±3ppb max per day
▲±0.5ppm max per year
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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25 Nov 20 |
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ISSUE 3 |
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750 KB |
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