[time-nuts] Ultralink WWVB receiver manuals?
John Ackermann N8UR
jra at febo.com
Thu Mar 29 19:11:59 EDT 2018
Thanks to another list memo, I got the basic manual. Got it fired up
and while it does things, I think there's a problem. The S Meter is
pinned all the way over to the right (very, very strong signal) and
stays there no matter how I shield the antenna. And I never see any
decoded bits. I hope the receiver chip (U4226B, unobtanium except from
China) isn't shot. Will do more testing when I get some cycles free.
It would be very nice to have a direct NIST time source in the lab
again, complete with PPS output.
Thanks!
John
----
On 03/29/2018 05:55 PM, Tom Van Baak wrote:
> Congrats on your acquisition. The Ultralink WWVB receivers are very nice. It should still work -- it's an AM subcode (not carrier phase) receiver. If you have more questions let me know. These modules were the darling of precise time at the turn of the century; before mobile phones, before GPS was affordable. Ultralink discontinued the product line within a few years when the market for WWVB-based timing dried up.
>
> Manuals here: http://leapsecond.com/museum/ulio/
>
> Good question on the cable. If you don't see it in the manual let me know; I'll dig out my cable and have a look. Note the inner 4 of 6 pins are Vcc, TCO, AGC, gnd.
>
> /tvb
>
> ----- Original Message -----
> From: "John Ackermann N8UR" <jra at febo.com>
> To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
> Sent: Thursday, March 29, 2018 8:57 AM
> Subject: [time-nuts] Ultralink WWVB receiver manuals?
>
>
>> I just acquired an Ultralink WWVB timecode receiver -- more
>> specifically, model 301 receiver and model 333 decoder.
>>
>> I'm looking for documentation on these guys. Anyone have a manual
>> they'd be willing to share?
>>
>> The key questions are really just two: (a) is the 6P6C modular cable
>> connecting the receiver and decoder straight, or reversed, and (b) what
>> are the four DIP switches on the back of the 333 used for?
>>
>> Thanks for any info.
>>
>> John
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