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Getting Started
R&S
®
ZNL/ZNLE
55
User Manual 1178.5966.02 ─ 07
5.2.2.12
Headphones Connector
The Spectrum Mode provides demodulators for AM, FM and PM signals, which can be
routed to the headphone connector. With headphones or an external loudspeaker con-
nected to the 3.5 mm headphone socket the displayed signal can be identified acousti-
cally.
●
This connector is provided by the "Additional Interfaces" option R&S
FPL1-B5.
This option is not available for the R&S
ZNLE.
●
The headphones connector is only functional in Spectrum mode (option
R&S
ZNL3|6-B1).
It can
not
be used to output sounds that are generated via Windows audio APIs. In
order to hear those sounds, connect an USB audio device to the instrument or
operate it via remote desktop.
●
Interruptions in analog output may occur if you switch between a VNA and a spec-
trum application, due to the separate hardware. In particular, if you run a sequence
of measurements including both measurement types, switching between both
modes can interrupt the signal from the output connector.
For details, see the R&S
ZNL/ZNLE Spectrum Mode User Manual.
5.2.2.13
Noise Source Control
The Noise Source Control female connector is used to provide the supply voltage for
an external noise source. For example, use it to measure the noise figure and gain of
amplifiers and frequency converting devices.
●
This connector is provided by the "Additional Interfaces" option R&S
FPL1-B5.
This option is not available for the R&S
ZNLE.
●
The Noise Source Control interface is only functional in Spectrum mode (option B1
for R&S
ZNL)
Conventional noise sources require a voltage of +28
V to be switched on and 0
V to be
switched off. The output supports a maximum load of 100
mA.
5.3
Trying Out the Instrument
This chapter introduces the most important functions and settings of the R&S
ZNL/
ZNLE step by step. The complete description of the functionality and its usage is given
in the R&S
ZNL/ZNLE User Manual. Basic instrument operation is described in
ter 5.4, "Operating the Instrument"
Trying Out the Instrument
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