Supplemental Characteristics - Agilent Technologies 85057B User's And Service Manual

Specifications
Mechanical Characteristics

Supplemental Characteristics

The following tables list the dimensions of the 50Ω airline and the 25Ω mismatch airline.
These are supplemental mechanical characteristics, and from these characteristics you can
calculate expected electrical performance.
Table 2-2 Connector Pin Depths
Connectors
Attenuators
a
Airlines
a. The relationship between the length of the inner conductor and the
length of the outer conductor determines the airline center conductor
recession. Refer to
Using these mechanical dimensions, you can calculate the expected electrical performance
with the equations in the following publications:
• Nelson, Robert E., and Marlene R. Coryell, "Electrical Parameters of Precision, Coaxial,
Air-Dielectric Transmission Lines", U.S. National Bureau of Standards Monograph No.
96.
• Somlo, P.I., "The Computation of Coaxial Line Step Capacitances", IEEE Transactions
on Microwave Theory and Techniques, Volume MTT-15, No. 1, January, 1967.
The measurement method in these publications provides a general idea of the expected
device characteristic impedance. Variations in connector interfaces can have a large effect
on your actual electrical measurements.
2-4
Allowable Recession
millimeters
0.000 to −0.025
0.0000 to −0.013
"Gaging the Airline" on page
inches
0.0000 to −0.001
0.0000 to −0.0005
3-10.
85057B