apollo psa test point adaptor

Jon Elson elson at pico-systems.com
Tue May 21 09:50:05 CDT 2019

On 05/20/2019 05:38 PM, Carl Claunch via cctalk wrote:
> On 05/19/2019 09:46 AM, Jon Elson via cctalk wrote:
>> There's a switch labeled "IRIG" which stands for Inter Range
>> Instrumentation Group, and refers to a standard for
>>    telemetry encoding.  There is a standard for time code, a
>>    standard for modulating analog signas onto a bunch of FM
>>    carriers, and a standard for multiplexing several analog
>>    signals onto one FM carrier.
> In this case IRIG stands for Inertial Reference Integrating Gyroscope, one
> of three inside the Intertial Measurement Unit of the spacecraft.
Good GRIEF!  Clashing acronyms.  And, NASA certainly knew 
about the other IRIG, as they used IRIG standards on a lot 
of telemetry and radar systems.


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