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Manual Operation
R&S
®
UPV
197
Getting Started 1146.2078.62 ─ 09
The checkboxes are used to operate the audio monitoring function.
●
"Audio Monitor" switches the loudspeaker or the headphones on/off. This function
corresponds to the loudspeaker ON key on the front panel of the instrument.
●
"Speaker enable" and "Phone enable" are used to preselect which of the two com-
ponents the on/off function described above applies to.
●
Any installed R&S
UPV-U2 retrofit is switched parallel to the headphones output;
hence, these BNC sockets are switched on and off just like jacks.
●
If the Phone/Aux box is activated, the headphone output and, if installed, the BNC
connectors (R&S
UPV-U2 option) remain permanently activated. The ON key only
affects the loudspeaker. This "permanent" setting is very useful, for example, if you
connect an oscilloscope on which the signal is to be continuously monitored and
the loudspeaker is to remain selectable at the same time.
The "Signal Source" field is used to select which signal is to be monitored. This can be
the measurement signal switched to the analysis path either in the
Input
or
Function
level, i.e. without or with corresponding filtering. Alternatively, the
generator
signal can
also be monitored. The individual levels of the analyzer are explained in greater detail
in
chapter 4.2.3.1, "Function Blocks and Measurement Levels"
In the "Channel" field, you select whether the signal of an individual channel (mono) or
the stereo signal is applied to the audio monitoring output. If "Both" is set, both chan-
nels are separately available at the two headphone outputs; the loudspeaker outputs
the signal from both channels. The same applies with installed R&S
UPV-U2 retrofit for
the two BNC sockets that are present.
In the "Volume" field, the playback volume of the loudspeaker or connected head-
phones is set by entering or changing the numeric value in the range from 0
dB to
-120
dB.
Alternatively, the loudspeaker key at the front of the instrument can be used. A window
with a symbolized volume control opens which can be operated directly with the rotary
knob, the cursor keys or the mouse. The ENTER function or pressing the volume key
again confirms the setting and closes the window.
Possible hearing damage from high sound pressure
The output voltage of the built-in headphones amplifier is influenced by the incoming
signal, by instrument settings such as the selected measurement range and test func-
tion, and by the set volume.
If the volume is set to maximum, the headphones amplifier may generate high output
voltages with an RMS value of up to 8 V.
Depending on the headphones' sensitivity, this may produce very high sound pressure
levels that may cause hearing damage.
To monitor varying input signals, therefore, it is advisable to reduce the volume and
take off the headphones until the signal has settled.
Auxiliaries Panel