[hpsdr] Precise receive frequency measurement

[Phil Harman]

Yes,  but it will be if you use an external 10MHz reference that has your 
required accuracy.,

73 Phil...VK6APH



-----Original Message----- 
From: Bruce Beford
Sent: Friday, March 08, 2013 10:05 AM
To: hpsdr at lists.openhpsdr.org
Subject: Re: [hpsdr] Precise receive frequency measurement

***** High Performance Software Defined Radio Discussion List *****

Thanks, Phil.
Doesn't the overall accuracy of this formula assume that the 122.88 MHz
clock -is- in fact, exactly correct?

73,
Bruce, N1RX

> The frequency is sent to Hermes/Mercury as a 32 bit value in Hz.  This is
> converted to a 32 bit phase word as follows:

> phase =  frequency * 2^32 / 122880000

> You will be able to calculate the actual frequency from the above.

> 73 Phil...VK6APH





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