[time-nuts] Hameg HM8125 Time/frequency Standard

Ian Sheffield ian.sheffield1 at tesco.net
Tue Jul 22 06:43:53 EDT 2008


Hi Alan,

Tried that, and downloaded the operating manual a while back.
Tried your tip and looked at the German version, but no luck either.

Thanks for the suggestion though.

Cheers,

Ian.

----- Original Message ----- 
From: "Alan Melia" <alan.melia at btinternet.com>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Tuesday, July 22, 2008 10:50 AM
Subject: Re: [time-nuts] Hameg HM8125 Time/frequency Standard


> Hi Ian I dont know whether it works for that unit, but try the Hameg site.
> http://www.hameg.com/66.0.html
> There are "almost" complete manuals for all the units (well certainly the
> scopes!) You may find that there are no schematics in the English
> versions....download the German versions (which you may see are bigger
> files) and the are often schematics at the back of these....the titles etc
> are also bilingual.
>
> Hope that helps
> Cheers de Alan G3NYK
>
> ----- Original Message -----
> From: "Ian Sheffield" <ian.sheffield1 at tesco.net>
> To: <time-nuts at febo.com>
> Sent: Tuesday, July 22, 2008 7:51 AM
> Subject: [time-nuts] Hameg HM8125 Time/frequency Standard
>
>
>> Hello,
>>
>> Does anyone have a copy of a schematic or service manual for the
> down-converter for the Hameg HM8125
>> GPS frequency/time receiver?
>>
>> The receiver and display seems to be working fine, but the separate
> down-converter appears to have been modified with a capacitor blocking the
> DC power feed from the receiver and what may be a voltage regulator has 
> been
> removed. The downconverter appears to do more than just shift frequency, 
> as
> it has a TDA 1574 FM subsystem chip in it as well as the expected RF
> circuitry.
>>
>> Any help would be appreciated, or even if someone had a spare
> downconverter for sale.........?
>>
>> These units do unfortunately, appear to be as scarce as hens' teeth.
>>
>> Thanks in advance,
>>
>> Ian Sheffield
>>
>>
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