"oven-compensated crystal oscillator"

1) Do you know what this could do to your power budget?

2) How about required warm-up times after power-up before
   seeing those quoted accuracy specs?

  RF Jim

----- Original Message -----
From: "Mike Singer" <mike@POLUOSTROV.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, August 14, 2002 11:07 AM
Subject: Re: [OT]: What Test Gear to measure xtal frequency to 1Hz


> Harold M Hallikainen wrote:
> > Also, remember that setting a 12 MHz oscillator to
> > within 1 Hz means it isn't going to stay there.
> > That's 0.1 ppm. Really good crystal oscillators
> > (with temperature compensation or ovens) can maybe
> > do 1 ppm or so.
>
> Yes, from Electronicstalk.com:
>
> "The FTS501AH OCXO offers a frequency stability of
> +/-250ppb over the standard temperature range of 0 to 70C"
>
> (ppb = 1000 ppm ?)
>
>  Mike.
>
>
> News article from Electronicstalk.com
> ____________________________________________________________
>
> OVEN-COMPENSATED CRYSTAL HOLDS FORM FOR TELECOMMS
> ____________________________________________________________
>
> Date: 9 August 2002
> News from: Fox Electronics
> Product: FTS501AH
> http://www.electronicstalk.com/news/fox/fox107.html
>
> The FTS501AH OCXO (oven-compensated crystal oscillator) meets
> stratum level accuracy requirements for telecommunications
> applications, making it ideal for use in basestations, telecomms
> switching, GPS and LAN/WAN applications as well as in test and
> satellite equipment. This is the latest product developed and
> manufactured at Fox's Customer Technology Centre (CTC), based at
> the company's headquarters in Fort Myers, FL. The FTS501AH OCXO
> offers a frequency stability of +/-250ppb over the standard
> temperature range of 0 to 70C and an overall accuracy of
> +/-4.6ppm for all conditions over 10 years. Frequency range of
> the new OCXO is 10 to 40MHz. Supply voltage is 5.0V, with 3.3V
> available, and control voltage is 0.5 to 5.0V. Storage
> temperature range is -40 to 85. In addition to the 14-pin DIP
> configuration, Fox's new oscillators are offered in a variety of
> different packaging and stabilities, based on customer
> requirements. The OCXOs are also available in CMOS and sinewave
> versions. Pricing for the new FTS501AH OCXOs begins at $68 each
> in quantities of 1000. Delivery is 8 weeks ARO, depending on
> frequency.
>

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