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[time-freq] RefLock II REF?

Owen, Michael Michael.Owen at Sensis.com
Mon Jun 19 18:29:17 UTC 2006

Steve -

Yes, it's just what I needed to know.  Thank you.


Michael R. Owen, Ph.D.
Senior System Engineer
Sensis Corporation
(315) 634-3066 

|-----Original Message-----
|From: time-freq-bounces at lists.tapr.org 
|[mailto:time-freq-bounces at lists.tapr.org] On Behalf Of Steven Bible
|Sent: Monday, June 19, 2006 2:22 PM
|To: TAPR time and frequency projects
|Subject: Re: [time-freq] RefLock II REF?
|Hi Mike,
|If you are using the 'r2_enhpps_30_1' configuration file, that 
|is, you are using the GPS 1PPS code, then the REF input is not 
|used.  The P6 1PPS 2-pin connector is your 'reference' input 
|for 1PPS this application.
|So let's summarize, if you are building a GPS disciplined 
|oscillator from the Reflock II, the OCXO output connects to 
|the VCXO IN SMA connector, the voltage tune of the OCXO 
|connects to the VTUNE SMA connector, the GPS 1 PPS signal 
|connects to P6.
|And yes, you can use the voltage regulator outputs on the 
|Reflock II board to power the GPS.  And P6 has a voltage 
|divider so that if the 1PPS is a 5V TTL signal will be divided 
|down to 3.3V for the CPLD.
|Does this help?
|Steve N7HPR
|-----Original Message-----
|>From: "Owen, Michael" <Michael.Owen at Sensis.com>
|>Sent: Jun 19, 2006 11:09 AM
|>To: TAPR time and frequency projects <time-freq at lists.tapr.org>
|>Subject: [time-freq] RefLock II REF?
|>Dear Steve -
|>I'm trying to implement the Reflock II for 1PPS in, 100.000 
|MHz out.  I 
|>have a nice 100 MHz OCXO.  I understand that VTUNE and OCXO out go to 
|>the OCXO.  What is REF and what does it do?  I can see that it's an 
|>input into the CPLD but nothing tells me what to do with it.  (I 
|>apologize if this is today's Stupid Question).
|>Michael R. Owen, Ph.D.
|>Senior System Engineer
|>Sensis Corporation
|>(315) 634-3066
|>time-freq mailing list
|>time-freq at lists.tapr.org 
|\r\n- Steve\r\n  (n7hpr at tapr.org)\r\n
|time-freq mailing list
|time-freq at lists.tapr.org 

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