accurate some of these measurements, precision components, and standard artifacts
ultimately can be made.
To address the Tegam System II uncertainty issue, the Army Primary Standards
Laboratory (APSL) is working diligently to reduce the reported calibration factor
uncertainties for thermistor mount power standards such as the Tegam model M1111
and HP model 478A-H75, particularly at the critical 50 MHz frequency. Users of these
power standards should be seeing APSL reports with uncertainties at 50 MHz of 0.7%
or better very soon. Calibration factor uncertainties at other frequencies may also be
reduced significantly. This should satisfy some of the concerns about supportability of
some of the newer power meters. Additional guidance will be provided by the
Engineering, Acquisition and Logistics Directorate as new solutions are identified.
to Commercial Equipment/ Computer Software
22 September 2005
Change Notice Number: 007
Contract Number DAAH01-01-D-0067
Agilent Technologies proposes a no-cost change to equipment supplied under Contract
Number DAAH01-01-D-0067. This ECP will document a new acquisition board recently
introduced into the commercial version of this product. The acquisition board may be
used for new purchases for the OS-303/G.
Model Number: OS-303/G
Serial Numbers affected: The new acquisition board will function in all serial numbers.
Description of Change: Minor. A new acquisition board, part number 54831-66407, has
been introduced into the WinXP commercial version of the OS-303/G. Agilent has
created a special version of Win98 operating system software to support this new board
in the OS-303/G. Any OS-303/G may be upgraded to the newest version of operating
software, revision 2.40 and any scope may use the new acquisition board. The 2.40
version of operating software is required when using the 54831-66407 acquisition board.
Testing was completed to demonstrate version 2.40 software working with older
acquisition boards and the new 54831-66407 functioning in a current OS-303/G. The
following table should be used when replacing acquisition boards:
2.10 or greater