User manual

46
Subject to change without notice
S t o r e a n d r e c a l l i n s t r u m e n t s e t t i n g s
5.13 Operation in the Receiver-Mode
By pushing the MODE key the selection menu will be called
which allows to switch between sweep mode (analyzer mode)
and receiver mode. The spectrum analyzer acts as a receiver
which measures the level at a preselected frequency. The most
important parameters such as e.g. frequency, amplitude, reso-
lution bandwidth may be set using the appropriate keys and can
be vary via knob or numerical keyboard. In the receiver mode
the same bandwidths are available as in the spectrum analyzer
mode. Additionally the bandwidths: 200 Hz, 9 kHz, 120 kHz and
1 MHz are available for emi emission measurements according
to CISPR.
Following detectors are available in the receiver mode and can
be set with the softkey menu DETECTOR:
– PEAK: the peak detector displays the highest level during
the set measurement time.
– AVG: the Average detector displays the linear average of
the measurement signal within the selected measurement
time.
– QPEAK: the quasi-peak detector evaluates the measure-
mentsignalaccordingtotheevaluationcurvesdenedin
the CISPR standard.
– RMS: the RMS detector takes the rms value of the mea-
surement signal during the set measurement time.
The key FREQ and the softkey DETECTOR selects the detector
(Peak, RMS, Average and Quasi-Peak). The measurement
time is the time during which the spectrum analyzer collects
measurements and combines them according to the detector
selected for a display.
With the soft menu item AUDIO the HMS series offers an AM and
a FM demodulator allowing listening to modulated signals. The
demodulated signal may be listened to with a headphone and an
intern speaker. The headphone is connected to the headphone
connector (3.5 mm female connector). If the headphon is ac-
tivated, the intern speaker will be deactivated. The respective
soft menu keys allow to switch the demodulator on or off and
to set the volume.
If an AM or FM demodulation is activated, the device
demodulates the signal and can not simultaneously
perform a level measurement. The unit shows n/a
dBm on the display.
6 Store and recall instrument settings
Your spectrum analyzer can store three different kinds of data:
– Instrument settings
– Waveforms
– Screen displays
Waveforms and screen displays can only be stored on USB
sticks. Instrument settings can be stored either on a USB stick
or in the instrument’s non-volatile memories.
6.1 Instrument settings
Push the key SAVE/RECALL for calling the main menu for storage
and load functions. First a listing is shown of the kinds of data
which can be stored and loaded. By pushing the key next to the
top menu item DEVICE SETTINGS this menu will open.
Fig. 6.1: Basic menu for instrument settings
In this menu, by pushing the respective key, it is possible to
call the menu for storing, the data manager for loading, and
the menu for exporting and importing instrument settings.
Additionally, the menu item DEFAULT SETT. will reset the
instrument to the factory settings. The storing menu is opened
by pushing the SAVE key.
Fig. 6.2: Saving instrument settings
Here the storage location (internal memory, front panel USB,
rear panel USB) is selected, also a name and a commentary
can be added; these will be stored by pushing the soft menu