[time-nuts] Re: Identifying Picosecond Pulse Labs Part?

[James C Cotton]

I ordered two from eBay for entertainment.   I think delay line might be correct, since one description I found is "rise time filter".

Jim, n8qoh

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________________________________
From: john.haine--- via time-nuts <time-nuts at lists.febo.com>
Sent: Saturday, October 21, 2023 5:18:38 AM
To: 'Discussion of precise time and frequency measurement' <time-nuts at lists.febo.com>
Cc: 'AC0XU (Jim)' <James.Schatzman at ac0xu.com>; john.haine at haine-online.net <john.haine at haine-online.net>
Subject: [time-nuts] Re: Identifying Picosecond Pulse Labs Part?

150ps delay line?

-----Original Message-----
From: AC0XU (Jim) via time-nuts <time-nuts at lists.febo.com>
Sent: Saturday, October 21, 2023 1:15 AM
To: time-nuts at lists.febo.com
Cc: AC0XU (Jim) <James.Schatzman at ac0xu.com>
Subject: [time-nuts] Identifying Picosecond Pulse Labs Part?

I have acquire some Picosecond Pulse Lab parts, about 2 in long with SMAs at
either end. They were advertized as DC block/2 GHz low pass filter.

However
a) It isn't a DC block - DC resistance from input to output is < 1 ohm.
b) It isn't a low pass filter - S12 is quite flat at 0 dB from 0 to 20 GHz.

Also, DC resistance from input or output to ground is infinite.

The only identification on it is "Picosecond Pulse Labs 9008". Any thoughts
as to what these things are?

Thanks!
Jim

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