[time-nuts] Z3815A

[Bob Camp]

Hi

That sounds like a more rational supply current, still a bit high, but not
crazy high. 

I've never traced out the second port. I've been happy just playing with the
front panel port.

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Mark C. Stephens
Sent: Tuesday, May 28, 2013 1:32 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Z3815A

Bob, Its settled down to around 1.3A @ 24V now.
I'll up the volts to 28 and see wat happens then.

Trying to trace where Port 1 comes out.

Port 2 is the front panel port from pins 7 (TXD) and 8 (RXD) on U107.
Pins 13 (RXD) and 14 (TXD) from U107 go to Port 1.
Logic probe can see no activity on these lines.

Also :SYST:COMM? Gives us SER2 so I know that the primary port (front panel)
is correct.
And :SYST:COMM:SER1:BAUD? yields +9600 so it knows about port 1.

Why? I was thinking I could use port 1 to drive a refclock..


-marki



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Bob Camp
Sent: Wednesday, 29 May 2013 2:36 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Z3815A

Hi

That's more power that it should be pulling. It *should* be happy on
anything from about 20 to 60 volts. I run mine on 28 volts. Last time I
looked it was pulling well under an amp. How much under - don't remember. 

The "kit" version from China comes with a 24V 2.x A supply. As with any
OCXO, the power drops quite a bit after warm up.

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Mark C. Stephens
Sent: Tuesday, May 28, 2013 11:58 AM
To: time-nuts at febo.com
Subject: [time-nuts] Z3815A

Watch Out, I got hold of one..

I have powered it up and its drawing 52W @ 24v.

My question is, What is the input voltage range on the Z3815A?

Also, one for those familiar with the Z3815A, "Holdover Uncertainty
Predict:" is showing 2 dashes ( -- ) From my experience with the Z380x
clocks this usually is displayed right after its locked to GPS.
Is there a problem with this unit, or the Z3815A won't ever display this, or
just give it some more time?


-marki

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