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Connecting the external test sets
R&S
®
ZNA67EXT
39
Getting Started 1179.6295.02 ─ 02
The H/L SWITCH cable is supplied with the R&S
ZNA67EXT. The cable end
labeled H/L SWITCH PORT
p
is intended for the diplexer connected to analyzer
port no.
p
. The H/L switch mechanism is controlled by drive port bit no.
p
(pin 15
+
p
) of the USER CONTROL connector.
For a detailed description of the connector, refer to the R&S
ZNA user manual or
help system.
Low frequency mode
In low frequency mode, the control cable is not needed – even if the DUT is
connected to the 1
mm test port connectors of the diplexers.
8.4
DC power supply
An external DC power supply with country-specific AC cable is provided with each
of the external test sets. Connect the power supply to the 9 V / 1.1 A DC input at
the rear panel of the frequency converter (see
Chapter 6.2.1.2, "Power supply
on page 23) and to a power outlet. The power supply supports input
AC voltages between 100 V and 240 V and frequencies between 47 Hz and 63
Hz.
A lit LED next to the standby switch indicates that the power supply operates
appropriately. If neither of the two LEDs is lit, check the fuse of the instrument
(see
Chapter 10.2, "Replacing fuses"
DC power supply