[time-nuts] [Bulk] Re: Z3805A 10 MHz Output Spectral Purity

J. L. Trantham jltran at att.net
Sun Dec 5 12:51:26 EST 2010


Sorry.  I forgot that important piece of information.

It was measured on a Tek 485 set to 50 ohm input impedance.  My other
standards are 50 ohm output impedance and I presume that the Z3805A is as
well but I do not know.

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of W2HX
Sent: Sunday, December 05, 2010 11:30 AM
To: 'Discussion of precise time and frequency measurement'
Subject: [Bulk] Re: [time-nuts] Z3805A 10 MHz Output Spectral Purity


Did you measure this while terminated into a 50 ohm load? (or whatever the
characteristic impedance is)

73 Eugene W2HX


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of J. L. Trantham
Sent: Sunday, December 05, 2010 12:22 PM
To: 'Discussion of precise time and frequency measurement'
Subject: [time-nuts] Z3805A 10 MHz Output Spectral Purity

I obtained a Z3805A from one of our popular far eastern sellers on ePay and
just got around to hooking it up to power and antenna.  It appears to be
working correctly, comes on frequency, 'locks', and matches my other
standards well, at least in frequency.

However, it is not a sine wave.  It is 'sine wave like' but obviously
distorted with the upper half of the sine wave somewhat flattened but
nowhere near as much as the bottom half.

Is this normal?

Thanks in advance.

Joe


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