HP 85106D, Manual

Page: 54 / 244

HP 85106D mm-Wave System 2-9
Operation
System Set Up
3. Before inspecting the test ports:
a. Reduce the RF power by pressing [
STIMULUS MENU
]
b. Press {
POWER MENU
} {
SOURCE POWER 1
}
(note the RF power level)
c. Enter [
-50
] [
x1
].
4. Inspect the test ports, then enter the RF power level, [
x1
]
(restore RF power level).
CAUTION The IF and LO ports on the test set cables can be damaged by electrostatic
discharge. Do not touch their center conductors unless proper ESD
precautions have been taken.
Waveguide
Connections
Figure 2-2 on page 2-8 shows the arrangement of the waveguide parts of the
test set. Familiarize yourself with the specific components making up the test
set before proceeding with the assembly. Detailed handling instructions are
provided with the calibration kit manuals.
Inspect each flange for damage, then clean the mating surfaces using
Isopropyl alcohol and a non-abrasive foam swab. Always support both
components being assembled and never allow bending or twisting force to be
applied to the flange connections.
For the Q, U, V, and W-band test set modules special captive screws of two
different lengths are used for all of the connections. The screw threads are
only halfway up the screw body. Also, guide pins are an integral part of the
flange.
There are two types of flanges used as shown in Figure 2-3. The test ports
use the precision flange and all other connections use the standard flange.
Figure 2-3 Standard and Precision Waveguide Flanges (Q, U, V, and W Bands)