Rohde & Schwarz HM8118, User Manual

Page: 49 / 76

49
Setting of Parameters
The values of the component set in into the formula:
The units will be adjusted once the component values
have been entered and the formula has been calculated
because the second addend is without unit:
For the 10pF component this leads to:
1.2% of 10pF is 0.12pF.
Based on the calculation the displayed value will be bet-
ween 10pF - 0.12pF = 9.88pF and 10pF + 0.12pF = 10.12pF.
15 MΩ
Accuracy
@1kHz
= 0,2% +
1,5 GΩ
15 x 10 6 Ω
Accuracy
@1kHz
= 0,2% +
1,5 x 10
9
Ω
15 Ω
Genauigkeit
@1kHz
= 0,2% +
1,5 x 10 3 Ω
15 Ω
Genauigkeit
@1kHz
= 0,2% +
1500 Ω
Genauigkeit
@1kHz
= 0,2% + 0,01
Accuracy
@1kHz
= 0,2% + 0,01 = 0,2 + (0,01 x 100%) = 0,2% + 1% = 1,2%
5 Setting of
Parameters
5.1 Selecting Values /Parameters
Each function and operating mode of the measuring ins-
trument can be selected with the keys on the front panel
of the instrument. Use the respective function key to se-
lect the measurement function. An active measurement
function is highlighted by an illuminated white LED. Subse-
quent settings refer to the selected measurement function.
To set parameters, three options are available:
❙ Numeric keypad
❙ Knob
❙ Arrow keys
You can set the measuring instrument parameters by pres-
sing the SELECT key
3
and by using the menu functions
SETUP, CORR, SYST and BIN (will only be displayed with
an integrated binning interface R&S®HO118). Use the keys
L-R/2
36
, C-D/3
34
, C-R/4
32
, R-Q/5
30
to select the sub
menus associated with the menu functions. Depending on
the function, you can set the respective measuring instru-
ment parameters by using the arrow keys
7
and
the knob
6
. Pressing the knob allows the user to modify
the corresponding measuring instrument parameters. This
will be indicated in the display by a blinking „E“ (Edit).
5.1.1 Knob with Arrow Keys
If you select the respective menu via arrow keys, you can
press the knob to activate the editing mode. If the editing
mode is active (blinking „E“ on the display), you can use
the knob to select the parameter or the input value. The
value input will be modified gradually, and the respective
input parameter will be set instantly. The nominal value is
increased by turning the knob to the right, and it is decrea-
sed by turning it to the left. Press the knob again to deacti-
vate the editing mode and to confirm the function slection.
Use the arrow keys to select the respective menu function.
5.1.2 Numeric Keypad
The easiest way to enter a value precisely and promptly is
to use the numeric keypad with numeric keys (0...9) and
the decimal point key. Once you have pressed the knob to
activate the editing mode, you can use the SELECT key
3
,
the ENTER key
25
or press the knob again to reactivate the
Fig. 5.1: Numeric keypad with function keys