Don,
It is my understanding that physical switch contacts are
"cleaned" with current - and use.
It is probably ok at the lower signal levels since from
time to time you're running the higher levels through the
switches.
Is there someway you can switch and then verify contact?
- Robert -
Robert A. Macy, PE [email protected]
408 286 3985 fx 408 297 9121
AJM International Electronics Consultants
101 E San Fernando, Suite 402
San Jose, CA 95112
On Mon, 21 Apr 2003 13:27:38 -0400
[email protected] wrote:
>
> Hello Friends,
>
> I have an application in which I would like to switch
> system signals on coax
> cables. One system is 80 to 1000 MHz, the other is 1-2
> GHz. I have found
> coax switches by Narda, DB Products and Dow Key. Dow Key
> indicates that the
> signals should be above -20 dBm to ensure that contact
> resistance doesn't
> cause a problem. The others do not spec or address low
> signal issues. My
> branches operate at -35 dBm, 0 dBm and 50 dBm. The 2
> higher values are not
> a problem, just the -35 dBm. Are there other companies
> that you are aware
> of that make 50 ohm coax switches that are specified to
> operate at low
> signal levels? Other ideas?
>
> Best regards,
>
> Don Umbdenstock
> Sensormatic
>
>
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/
To cancel your subscription, send mail to:
[email protected]
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Ron Pickard: [email protected]
Dave Heald: [email protected]
For policy questions, send mail to:
Richard Nute: [email protected]
Jim Bacher: [email protected]
Archive is being moved, we will announce when it is back on-line.
All emc-pstc postings are archived and searchable on the web at:
http://www.ieeecommunities.org/emc-pstc
