Getting Started
R&S
®
ZNH
25
User Manual 1334.5985.02 ─ 02
Risk of electrical shock
To avoid electrical shock, the DC input voltage must never exceed the value specified
on the housing.
Risk of instrument damage
To avoid damage to the coupling capacitor, input attenuator or the mixer, the DC input
voltage must never exceed the value specified in the data sheet.
Risk of DUT damage
The R&S
ZNH displays a signal source indicator on the
. When the indicator
shows a full green circle, signal source is present on the RF out connector.
To prevent damage on DUT, it is important to consider maximum input power on DUT
before connection.
●
: Signal source is present on the RF out connector
●
: Signal source is not present on the RF out connector
BNC connector
You can connect the BNC connector for various applications. It supports an external
trigger signal or an external reference signal. It can also be configured as a BIAS port.
When the BNC connector is configured as a trigger input, it controls the start of a mea-
surement. The trigger mode is selected in the SWEEP menu. The trigger threshold is
similar to that of TTL signals.
When the BNC connector is configured as reference input, you can apply a 10 MHz
external reference signal to it for frequency synchronization. The external reference
label
is displayed at the top right corner of the
to indicate that the refer-
ence signal is supplied via external signal input. The label turns green when the refer-
ence signal is detected.
The level of the reference signal must be larger than 0 dBm. If there is no reference
signal present at the BNC connector, the R&S
ZNH displays an appropriate message.
Thus, measurements without a valid reference can be avoided.
With R&S ZNH-K10 (order number 1334.6846.02), the BNC connector can be config-
ured as an internal DC bias port providing direct current output. Active equipment
under test can be supplied with power via the bias port.
Instrument Tour
