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Preparing for Use
R&S
®
ZVA-Z75, -Z90, -Z110, -Z140, -Z170, -Z220, -Z325, -Z500
16
Quick Start Guide 1307.7039.62 ─ 10
2.4.8 Mounting a DUT
The DUT has to be mounted to the test port adapter at the front of the converter. Use
the included screws and hex ball driver. For higher precision, a torque-controlled hex
ball driver R&S
ZV-Z1000 is available as an accessory (order number 1314.5467.02).
Rohde & Schwarz also offers a special angled hex ball driver R&S
ZCAW (order num-
ber 1175.1960.00) that can advantageously be applied in the tight space between rear
side of the test port adapter flange and converter front side (see
figure 2-8
).
Fig. 2-8: Angled hex ball driver R&S
ZCAW (accessory)
A tight and accurate connection is very important to ensure precise calibration and
measurement results. Depending on the type of waveguide flange of the DUT it may
be required to exchange the test port adapter (see
chapter 2.4.4, "Selecting and
Mounting a Test Port Adapter"
,
on page 12).
For a test setup involving two frequency converters connected to one DUT, converters
and DUT have to be aligned accurately, using the adjustable instrument feet. A bubble
level may help for proper alignment.
2.4.9 Replacing Fuses
The power supply connector at the rear panel is protected by a fuse of type IEC60127
T1 L/H (IEC60127 T1.8 L/H on R&S
ZVA-Z500 converters). To replace the fuse open
the fuse holder by slightly turning the lid counter-clockwise, preferably using a small
coin. A replacement fuse is provided with the instrument.
Putting the Converter into Operation