Re: Insertion delay needed for BNC-BNC couplers UG491A/U (M-M) and UG914/U (F-F)

John KN5L
 

Hi Dave,

On 5/22/20 3:11 PM, David Feldman via groups.io wrote:
trying to understand, so please bear with (and correct) me --- I gather that at ~3 pSec/mm, the physical distance between the BNC short
BNC Male Short:
https://www.amphenolrf.com/downloads/dl/file/id/7341/product/5273/202114_customer_drawing.pdf

Male ref plane is outside edge. Using drawing above, full length is
15mm. ref plane is recessed a little and short is also recessed a little
from end. Lets call ref plane to short as ~13mm. Velocity factor of 0.67.

13mm * 3p/mm * 1/0.67 * 2 = 116.4ps

Measured value is 113.5ps. Physical length for 113.5ps = 12.7mm

John KN5L

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