R&S SZM Manual page 25

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R&S SZM
Most R&S SZM models can be equipped with a mechanically or elec-
tronically controlled attenuator (see data sheet for details). For the
mechanically controlled attenuator, a micrometer screw is located on
top of the casing. Using the screw you can modify the signal output
power manually, depending on the current frequency. The scale on the
screw is based on calibration data and supports you in adjusting the
signal level.
Turning the screw clockwise reduces the output power, while turning the
screw counter-clockwise increases the output power.
If the screw is turned out to the top position, maximum power is provided at the
output of the R&S SZM. If the screw is turned in to the bottom position, minimum
power is provided at the output of the R&S SZM.
If you accidentally unscrew the knob completely, simply screw it on again.
The power calibration remains valid.
6.1.2 Test port adapter (waveguide flange)
You can connect the DUT directly to the R&S SZM. To protect this output from
mechanical damage, we recommend the use of a test port adapter (TPA). This
TPA is optional available for all R&S SZM models.
The precision waveguide flange of the test port adapter is equipped with two
alignment pins and two holes that receive the alignment pins of the device under
test (DUT). You can use the two holes in the middle of the flange for additional
pins to increase the accuracy and stability of the connection.
Manual 1179.3967.02 ─ 02
Instrument tour
Front and top panel
25