[SI-LIST] Re: bnc connector
- From: steve weir <weirsi@xxxxxxxxxx>
- To: "Deibele, Craig Edmond" <deibele@xxxxxxxx>
- Date: Tue, 19 Mar 2013 07:13:34 -0700
Craig what performance for a BNC connector:
a. From a quality supplier that you have designed a PCB transition for, or
b. From anyone that you have slapped onto a PCB, or
c. Attached to a $10. cable from eBay, or
d. Attached to a $100. cable
If you are evaluating cables then the first problem is getting a
reference plane that you trust which is going to involve another BNC
connector pair. Once you get past that then I think you can get some
sensible measurements.
Steve
On 3/19/2013 7:01 AM, Deibele, Craig Edmond wrote:
> i agree steve, this is not a delay change.
>
> i guess what i am asking is, what phase performance should one expect for bnc?
>
>
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
> Behalf Of steve weir
> Sent: Tuesday, March 19, 2013 9:56 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: bnc connector
>
> It sounds like you have a stub or poor return situation. 3 deg at 50MHz
> is 167ps. BNC's can do OK to 3GHz or better. Agilent coaxed ( no pun
> intended ) them past 5 GHz.
>
> Steve
>
>
> On 3/19/2013 6:14 AM, Deibele, Craig Edmond wrote:
>> i am interested in a relative transmission measurement (magnitude and phase)
>> using a cable with bnc connectors. the frequency of interest is relatively
>> low, only 50 MHz. simple bench measurements show that the stability of the
>> measurement is on the order of 3 degrees. i've looked around for additional
>> data or guidance to suggest what tolerance i should expect using bnc.
>>
>> i've not found anything suitable. does anyone have any references or ideas
>> for what to expect?
>>
>> -craig
>>
>>
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