[Milsurplus] RADAR Simulator Question

[J. Forster]

Hi Tony.

I've reported the bounces to the Postmaster. Thanks.

Interesting. They are called flying spot scanners.

At present we are looking at doing the scene simulation digitally, but the
capability to scan in maps might be very useful. I'll get back to you in a
few days. OK?

How big are the units physically? Can you try emailing me a pic in a day
or so?

Best,
-John

=============


> John,
>
> YOUR EMAIL ALWAYS BOUNCES!!
>
> I have a few old FAA surplus units there is a photo multiplier tube and a
> crt with what looks like a slide projector slide in between them of a map,
> part of a radar display. I assume it comes out as video. I assume they
> were
> used to provide a map overlay on a radar screen. I assume it comes out as
> video, but I know nothing about them , sounds like might to the job though
> Tony
>
> ----- Original Message -----
> From: "J. Forster" <jfor at quik.com>
> To: <milsurplus at mailman.qth.net>
> Sent: Tuesday, October 06, 2009 1:31 PM
> Subject: [Milsurplus] RADAR Simulator Question
>
>
>> In designing a simulator for a WW II vintage SG-1 RADAR, a design
>> question
>> has come up.
>>
>> First off, the RADAR has a PPI display and the objective is to create a
>> realistic looking display on the console screen and also on various
>> repeater displays located about the ship (Battleship Massachusetts).
>>
>> Rather than stripping the guts out of the displays and replacing them w/
>> LCDs, they'd prefer to emulate the original signals and use the existing
>> hardware as built.
>>
>> The PPI displays are magnetic deflection CRTs w/ rotating yokes. Each
>> display has a yoke servo that takes a synchro signal from the antenna.
>> This is no problem at all. The same signal will be digitized and used as
>> an address in a scene PROM or RAM.
>>
>> The sweeps will all be locally generated w/in the displays, requiring
>> only
>> a trigger signal as originally done.
>>
>> My question is about the video. We'll either inject that as an AM
>> modulated signal at IF frequency or at baseband, but the issue is how
>> many
>> bits are needed to create a realistic video display?
>>
>> I can only hazard a guess here, as I've never tried it before. At a WAG,
>> I'd say somewhere between 2 and 8 bits should suffice, but I really
>> don't
>> know. One more thing. I don't know, but don't think the RADAR has an IF
>> gain that varies w/ the sweep, but am not positive.
>>
>> Any suggestions are welcome.
>>
>> Best,
>> -John
>>
>> ==============
>>
>>
>>
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>