Operation; Block Diagram - HP 41951A Operation Note

OPERATION
SECTION 3
OPERATION
3-1. INTRODUCTION
This section provides the information necessary to use the 41951A. WARNINGS, CAU-
TIONS, and NOTES are given throughout, and they should be followed to insure operator
safety and serviceability of the unit.
NOTE
For detailed information on 4195A operation, refer to the 4195A's Operation
Manual.
3-2. BLOCK DIAGRAM
The Impedance Test Adapter's block diagram is shown in Figure 3-1. The number included
in Figure 3-1, indicates the insertion loss of the Impedance Test Adapter when the 419514 is
connected to the HP 4195A, and the 50 О load is connected to the measurement terminal
( APC-7 connector ) of the Impedance Test Adapter. The output signal to the QUTPUT В
connector is approximately 18 dB lower than the input signal to the INPUT S connector, and
the output signal to the DUT is approximately 12 dB lower than the input signal ( the voltage
applied to DUT is about a quarter of the voltage supplied from the 4195A ).
Figure 3-1. impedance Test Adapter's Block Diagram
3-3. APC-7 CONNECTOR
The 41951А'8 measurement terminal is an APC-7 connector. This connector provides the
capability for connecting and installing an accessory test fixture matched to the 41951A, or a
user-built test fixture. The APC-7 connector test port, a two-terminal configuration, has a
characteristics impedance of 50 О which is equal to the base impedance in reflection coeffi-
cient measurements. This base impedance represents the reference in the normalized im-
pedance calculations for multiple parameter derivations.
3-1