Preparing for Use
R&S
®
ZVA-Z75, -Z90, -Z110, -Z140, -Z170, -Z220, -Z325, -Z500
7
Quick Start Guide 1307.7039.62 ─ 10
1.565 mm at both ends. The alternative adapter has holes with a diameter of 1.605 mm
at the DUT side. The DUT side is marked by the label "HP/A", indicating that this side
is HP/Agilent compatible (i.e. supports thicker pins).
R&S
ZVA-Z75 and R&S
ZVA-Z90 converters are delivered with an HP/A compatible
adapter.
Fig. 2-2: Test port adapter of R&S ZVA-Z110
Risk of damaging waveguide flanges
The waveguide flanges of the converter and of the test port adapters must be protec-
ted against mechanical damage. Furthermore the waveguides must be shielded from
dust.
Protect the waveguide flange of the converter by leaving a test port adapter mounted.
When the converter is not in use attach one of the included protective caps to the
adapter. Also attach protective caps to the second test port adapter. Avoid scratching
the contact surfaces of the waveguide flanges.
2.2 Output Power Adjusting Screw
The output power of the converter can be adjusted via the network analyzer only for
the models ZVA-Z90 and ZVA-Z110. The converter models R&S ZVA-Z75, R&S ZVA-
Z140, R&S ZVA-Z170, R&S ZVA-Z220, R&S ZVA-Z325 and R&S ZVA-Z500 (and addi-
tionally R&S ZVA-Z110) comprise an output power adjusting screw on the top of the
converter housing. When the frequency converter mode is activated at the network
analyzer, the output power of the analyzer is set to a fixed value optimized for the
selected type of frequency converter. For the R&S ZVA-Z90 and R&S ZVA-Z110 the
R&S®ZVA Frequency Converter Leveling Tool can be applied for making full use of
these converters' ability to adjust test port output power via RF input power.
The screw at the top of the converter allows to adjust the output power of the wave-
guide test port. Turning the screw clockwise reduces the output power while turning the
screw counter-clockwise increases the output power. Adjusting the screw to 0 mm
results in minimum power while maximum power is reached at about 2 mm. If you acci-
dentally unscrew the knob completely, simply screw it on again. If you readjust the
Output Power Adjusting Screw
