[Elecraft] Terminators on empty outputs/connectors
Clay Autery
KY5G at montac.com
Thu May 24 13:02:26 EDT 2018
The HP GPS Splitters are amplified (unity gain), AND the documents say
that all of the non-powered (typically all but port 1) ports are
terminated with 200 Ohm resistors to simulate an antenna load (This is
part of DC blocking the ports and/or "tricks" the amp into working when
all ports aren't populated. I'm going to assume that on these active
splitters, no termination is required, just port covers to keep them clean.
______________________
Clay Autery, KY5G
(318) 518-1389
On 05/24/18 07:53, Wes Stewart wrote:
> I wouldn't say they were self-terminating, but more that they don't
> care. If you have a multi-port passive splitter then I would
> terminate unused ports to ensure proper splitting. Maybe your GPS
> distribution amp too as it may be an amp driving a passive splitter
> inside.
>
> Wes N7WS
>
> On 5/24/2018 1:46 AM, Clay Autery wrote:
>> Putting in a hardware order...
>>
>> Question: Is it recommended to put terminators on all/certain unused
>> ports?
>> K3s Antenna ports not being used? Any others?
>> GPS Distibution Amp (HP 58516a/HP58517a Unity Gain Distro Amp) ports
>> not being used?
>> Output ports on GPSDO and NTP servers (10MHz and PPS)?
>> Others?
>>
>> Or are some/all of them self terminating?
>>
>> 73,
>>
>
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