[SI-LIST] Re: Probe impedance effect at high frequency
- From: "Steven Kan" <steven@xxxxxxxxxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Mon, 20 Mar 2006 08:33:53 -0800
I'm terribly embarrassed to have to post a correction to my earlier post. I
mis-read some test results and quoted the spec of a different product. The
correct bandwidth of these probes is 1.5 GHz, not 3 GHz. The draft webpage
has also been corrected. My sincerest apologies if anyone was misled by my
mistake.
Also, I have been asked off-list by many people if the probe can be used to
make differential measurements, and the answer is no, at least not directly.
The probe is passive, with a single signal pin and a series resistor. When
touching your circuit it will behave like you've inserted a pickoff tee.
Two of these could be used with an external diff amp to take differential
measurements, but I gather that's not what most people are looking to do.
Sorry again about the incorrect information.
--
Steven Kan (p) 310-515-5330 x24
Pulse Research Lab (f) 310-515-0068
1234 Francisco St., Torrance, CA 90502 (c) 818-620-3062
mailto:steven@xxxxxxxxxxxxxxxxxxxx
http://www.pulseresearchlab.com
----- Original Message -----
From: "Steven Kan" <steven@xxxxxxxxxxxxxxxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Thursday, March 16, 2006 4:33 PM
Subject: Re: Probe impedance effect at high frequency
> Terence,
>
> We are about to introduce a 3+ GHz probe that should handle your 1.25 GHz
> application just fine. We don't have any formal specifications for it yet,
> but we have an early draft of a web page and a photo, here:
>
> http://www.pulseresearchlab.com/products/gigaprobe/
>
> These probes are only $55 (for U.S. delivery), so it wouldn't be too
> expensive to try out. It does require a 50 Ohm cable, but most people have
> these lying around.
>
> We'll post 'scope shots shortly.
> --
> Steven Kan (p) 310-515-5330 x24
> Pulse Research Lab (f) 310-515-0068
> 1234 Francisco St., Torrance, CA 90502 (c) 818-620-3062
> mailto:steven@xxxxxxxxxxxxxxxxxxxx
> http://www.pulseresearchlab.com
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