Keysight M1970 Series, User Manual

Page: 25 / 53

Operation 2
Keysight M1970 Series User’s Guide 25
Waveguide protection foam
Do not remove, displace, or damage the non-conductive foam installed in the
open end of the waveguide. This foam keeps small objects from entering the
waveguide.
Provide mechanical support for the mixer
Assure the mixer body is properly supported so it does not present any stress on
the waveguide connection. Instrument Option 301 provides a jackstand that
allows a stable support and height adjustment.
Avoiding waveguide flange damage
Install the waveguide flange cap whenever the mixer is not connected to a device
under test. This will protect the waveguide flange mating surface.
Mixer waveguide connections
Assure the shoulder of the mixer waveguide flange is properly aligned with the
flange of the device under test. To ensure proper mating, it is important to tighten
all screws equally. To do this, tighten opposed screws in pairs by a small amount
until all are snug. Final torque must not exceed 7 in pounds.