Preparing the Analyzer for Use
R&S
®
ZVA80
17
Quick Start Guide 1312.6808.62 ─ 02
2.5.4 Connecting the Control Cable
Switchover between low frequency and high frequency mode is automatically controlled
from the R&S ZVA80 base unit. If you operate your R&S ZVA80 in high frequency mode,
use the "H/L Switch" cable supplied with the R&S ZVA80 to connect the USER CON-
TROL connector on the rear panel of the base unit to the H/L SWITCH connectors on the
top side of each diplexer. The cable end labeled H/L SWITCH PORT 1 is intended for
the "left" diplexer (connected to the analyzer ports 1 and 3); the cable end labeled H/L
SWITCH PORT 2 is for the "right" diplexer (connected to ports 2 and 4).
The H/L switch mechanism is controlled by the drive port bits no. 1 and 2 (pins no. 16
and 17) of the USER CONTROL connector. For a detailed description of the connector
refer to the help system of your network analyzer.
Low frequency mode
The control cable is not needed in low frequency mode. It is recommended to remove
the control cable if no frequencies above approx. 50 GHz are measured, even if the DUT
is connected to the 1 mm test port connectors of the diplexers.
2.5.5 Connecting RF Cables
The R&S ZVA80 is delivered with two fully assembled external test sets, each consisting
of a diplexer R&S ZVA-ZD80 and a frequency converter WR15 R&S ZVA-Z75. The
"internal" connection between the diplexers and frequency converters is described in
chapter 2.3, "Diplexer Connectors"
, on page 8. The left test set is intended for PORT 1 /
PORT 3 of the R&S ZVA80 base unit; the right test set for PORT 2 / PORT 4. Connection
of the two test sets is analogous.
Risk of instrument damage
The RF input power at the RF IN and LO IN connectors must not exceed the maximum
value quoted in the data sheet. The maximum value is below the maximum RF source
power of the network analyzer. The "ZVA80-BU" mode ensures compatible source pow-
ers.
Before you connect your external test set to the network analyzer, always activate the
"ZVA80-BU" mode using the "Frequency Converter" dialog (see
the ZVA80-BU Measurement Mode"
Putting the Analyzer into Operation
