[time-nuts] Z3801A/58503A Help

[scmcgrath at gmail.com]

Btw the telco 48 volt supply is in reality -48 ie positive ground system.  So be careful with grounding esp in common with other gear

Scott
Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: Hal Murray <hmurray at megapathdsl.net>
Sender: time-nuts-bounces at febo.com
Date: Tue, 30 Nov 2010 22:38:18 
To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: Re: [time-nuts] Z3801A/58503A Help


> I have run the Z38XX software but I dont really understand yet what the
> charts are telling me, outside of the sat signal strength and pattern.

There is lots and lots of info on the Z3801A out on the web.  (Time sink 
warning.)  Here is a good place to start:
  http://www.realhamradio.com/GPS_Frequency_Standard.htm

google will find lots more.

I suggest getting a copy of the User's Guide and reading through it.  Here is 
one.
  www.leapsecond.com/museum/z3801a/097-z3801-01-iss-1.pdf



> My biggest concern is that the power supply that came with the package is 24
> volts and the back of the box indicates that it requires a 36 to 60 volt
> power supply.

There are two versions of the Z3801A, one for 48V and one for 24V.  I assume 
48 is telco and 24 is cell phone.  48 volts from lead acid batteries is 
really 54 if they are fully charged.  (13.6 for your 12 V car)

Take the cover off and look inside to see what you really have.  (If you 
haven't already taken the cover off, this is a good excuse.)  There is a 
power supply board.  It's on top where you can see it without taking anything 
else apart.  It's got a couple of DC-DC converter "bricks".  Maybe you can 
find some input voltage ratings.

Most of those bricks will work over a wide input range, probably wider than 
spec if you aren't pulling full rated output current.

Or ask the seller.


-- 
These are my opinions, not necessarily my employer's.  I hate spam.




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