[time-nuts] Austron 1210D Manual Update

Sebastian Stolp sebastianstolp at gmx.net
Sat Mar 10 11:28:36 UTC 2007


Any one of you 1210 owners among the time-nuts who might want to sell  
a unit like that, please let me know.
(Won't fire a missile with it ;-)
SEBASTIAN STOLP
GOETZHUSERWEG 165
CH5245 HABSBURG, SWITZERLAND
GOOGLE EARTH: 47°28'04.15''N 8°10'06.10''E
+ 41 76 200 00 80
+ 41 56 534 56 26


Am 10.03.2007 um 03:03 schrieb Steve Krull:

>
> Close, but not quite. PMEL is an acronym for Precision Measurement  
> Equipment Laboratory. They are metrology labs tasked with  
> maintenance and operation of the standards for electrical (voltage,  
> current, resistance, frequency, and time) as well as mechanical  
> standards for weight, pressure, etc. Larger labs also had optics  
> and radiation cal facilities. They also calibrated and repaired the  
> working standards and test equipment used by the rest of the base,  
> tenant units, and off-site facilities. I spent 8 years of active  
> duty time, and several more in the ANG, running the time/frequency  
> and RF sections of various PMELs stateside and overseas.
> We used the 1210D as a transfer standard to set the timing on  
> everything from comm links to missile launch crypto links. We had a  
> time/frequency console with Cs and Rb standards, as well as HP and  
> Fluke VLF receivers, and a host of HP and Sulzer crystal  
> oscillators, and a fairly sophisticated cross-comparison system.  
> The 1210's were adjusted against the console, driven directly to  
> the silos, and rechecked on return to the lab. The specs for  
> allowable error over the time they were out of the lab are still  
> classified, even though the missile systems are gone. My last  
> couple of years in an air national guard unit, we switched to GPS- 
> disciplined timing standards to set TOD/WOD codes for the secure  
> air-to-air and air-to-ground comm systems. Wish I could remember  
> the manufacturer of the units, Magnavox I think. They were three- 
> piece systems in supposedly EMP-proof boxes, and took three men and  
> a boy to move around.
> Steve Krull
>
> ---- Brian Kirby <kirbybq at bellsouth.net> wrote:
>> PMEL is the correct term in the Air Force. It stands for Precision
>> Meteorological Electronic Lab, it the branch of the Air Force that  
>> does
>> test equipment calibration.
>>
>> The 1210D was standard test equipment for labs that did not have
>> rubidiums and cesiums, which was quite a few.
>>
>> When I worked in satellite communications back in the late 70s, early
>> 80s, I seen a lot of these units (1210D). We used HP cesium beams at
>> the earth stations. These units were tracked back the USNO, and we  
>> used
>> a modem to do time transfer over the air, to check the cesiums drift.
>> The cal labs brought there 1210D's to our site about every 30 days to
>> calibrate and sync the 1210s.
>>
>> Rob Kimberley wrote:
>>> Hi John,
>>>
>>> Not heard that one before. It is always possible that there was  
>>> some batch
>>> selection, but unaware of this during my time (July '85 to Dec '88).
>>>
>>> Rob
>>>
>>> -----Original Message-----
>>> From: time-nuts-bounces at febo.com [mailto:time-nuts- 
>>> bounces at febo.com] On
>>> Behalf Of John Ackermann N8UR
>>> Sent: 09 March 2007 13:29
>>> To: Discussion of precise time and frequency measurement
>>> Subject: Re: [time-nuts] Austron 1210D Manual Update
>>>
>>> Rob Kimberley said the following on 03/09/2007 03:25 AM:
>>>> John,
>>>>
>>>> The unit shipped with Austron's 1150 OCXO - a VERY nice  
>>>> oscillator. I
>>>> also believe that they sold a bunch of these units to the US  
>>>> Navy for
>>>> portable references to sync up Subs.
>>>
>>> Hi Rob --
>>>
>>> I had heard mutterings that the 1150s that went into the 1210s  
>>> weren't quite
>>> as hand-picked as the ones that went into the 1250A standard, but  
>>> this one
>>> seems to be doing quite well. (I just got a 1250A that on a quick  
>>> test
>>> performs at least as well as this 1210; I'll be doing a better  
>>> test after
>>> it's had a chance to stabilize for another week or two.)
>>>
>>> It does appear that an awful lot of the 1210s went into various  
>>> military
>>> applications; one of the few references I found on-line was to  
>>> one of the
>>> PMEL (I think I got that acronym right) chat groups for the Air  
>>> Force.
>>>
>>> John
>>>
>>> _______________________________________________
>>> time-nuts mailing list
>>> time-nuts at febo.com
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>>
>>>
>>>
>>> _______________________________________________
>>> time-nuts mailing list
>>> time-nuts at febo.com
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>>
>>
>> _______________________________________________
>> time-nuts mailing list
>> time-nuts at febo.com
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> _______________________________________________
> time-nuts mailing list
> time-nuts at febo.com
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts




More information about the Time-nuts_lists.febo.com mailing list