Rohde & Schwarz UPD, Примечание к применению

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1GA16_1L.DOC ROHDE & SCHWARZ 8
3 3.4 .4 Entry of Parameters Entry of Parameters
All parameters are entered at level 3 and initiated by softkeys. Strings, integer and floating-point numbers
are entered in a dialog, a 1-out-of-N selection is made at another softkey level.
For dialog entries the following applies:
•
The designation of the parameter (eg voltage) is displayed in the entry line, possibly together with the
unit (eg V).
•
The currently set value is displayed at the right of the cursor. It may be overwritten or confirmed by
means of the RETURN key.
•
Floating-point numbers are entered in the specified unit; only the value is entered.
•
If the permissible upper or lower limit is exceeded, the entry is limited to this value or a new entry is
requested.
For 1-out-of-N entries the following applies:
•
Selecting a 1-out-of-N entry opens up a 1-out-of-N selection level at which selectable values are
assigned to the softkeys.
•
When the desired softkey is pressed the selected value becomes valid immediately and the 1-out-of-N
selection level is closed.
Since the parameters to be entered in this way are the same for most of the measurements, they will be
explained in brief below. Special parameters shall be dealt with together with the respective
measurement. The mentioned measurement modes FFT noise and frequency sweep are explained in
detail in section 4.
- VOLTAGE (F6, level 3): total voltage (FFT noise) or sinewave voltage (frequency sweep), at the same
time DC voltage for measuring the DC resistance.
- FREQ RNG (F7, level 3): Lower Freq (in Hz) and Upper Freq (in Hz): frequency range within which
sinusoidal lines are generated (FFT noise) or sweep points set (frequency sweep). With FFT noise
mode, reducing the frequency range also reduces the number of sinusoidal lines and therefore
shortens the time required for generating the noise signal. If frequency sweep is used the resolution is
improved (constant number of sweep points).
- SWP PNTS (F8, level 3): number of sweep points (frequency sweep only). Reducing the sweep points
shortens the sweep time, an increase improves the resolution.
- FFT SIZE: number of FFT lines determining the FFT resolution and therefore the FFT noise. Reducing
the lines causes the resolution to deteriorate but shortens the time for generating the noise signal and
the FFT measurement time.
3 3.5 .5 Common Softkeys for Post-Processing Common Softkeys for Post-Processing
The softkeys for post-processing are at softkey level 4. Some of them are available for all measurements
and always assigned the same function (and label):
•
Softkey #2 (F6): o <--> O changes from partial to full graphics display and vice versa.
•
Softkey #3 (F7): GOTO UPD changes temporarily to the UPD operating software (see section 7.1,
Change of Task Application/User Interface)
•
Softkey #4 (F8): HARDCOPY outputs the screen content to a printer or file (see section 7.2.2, Printout
during Application Run)