Products > Test Equipment

EIP 545B Frenquency counter

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HighPrecision:
This board is the old type @1MHz clock and ancient EPROMs TMS2516/2532, empty sockets are for option firmware extensions, your Opt.02 Power-meter EPROM is located on A107 board.

New board is much different, see this link:
https://911components.myshopify.com/products/eip-micorwave-2020215-02-a-circuit-card-assembly

See my previous posts for more detailed explanations.

Dave Cawley:
That's odd ?  I also have the band 4 option but not the external sensor, but I don't need it.

Do you think my counter may not be as original as I thought it was ?

Whatever,  it is doing what I want so I'm a happy bunny !

Regards

Dave

HighPrecision:

--- Quote from: Dave Cawley on December 30, 2018, 10:19:35 am ---That's odd ?

--- End quote ---

Not necessarily  :)

Your hardware configuration depend by CCN number on a label at rear panel, unless this unit was modified previously by others (board exchange), the presence of MC68(B)21P probably indicate a possible previous attempt to resolve the keyboard problem.

I have a 578B with some options (01,02,05,06) and this unit have some old boards, clearly exchanged with other units, but after repair it's fully operative with very good sensitivity on band 3.

Dave Cawley:
 :palm: Just went into the workshop it is a 548A, options 02, 06 serial number 02063  ccn 2309 or maybe 2307 ?

Sensitivity on 2.7Ghz -32dBm

HighPrecision:

--- Quote from: Dave Cawley on December 30, 2018, 05:29:09 pm --- :palm: Just went into the workshop it is a 548A, options 02, 06 serial number 02063  ccn 2309 or maybe 2307 ?

Sensitivity on 2.7Ghz -32dBm

--- End quote ---

A105 board in your photo is consistent with the CCN 2307

band 3 sensitivity at -32dBm is good as the majority of these units, some A203 MW converters exhibit more sens as mine at -37dBm.

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