HP 8530A, Руководство по эксплуатации и программированию, Страница: 219 / 439

Entry Block
Changing V alues Using the Numeric K eypad
T o change a value using the numeric keypad:
1. Select the function (start angle , frequency , or any other function that requires a value). This
function becomes the \active function." Notice that the function now appears in the \active
function area" of the display .
2. Enter the new value using numeric keys , decimal point, and a terminator key . T o change
the sign of the entry , press 4 +/0 5 . If you make a mistake , press the 4 BACKSP A CE 5 key . (If you
have already pressed a terminator key , you must re-enter the entire value).
3. T erminate the entry with the appropriate units .
T able 10-1. Numeric V alue T erminator K ey Usage
K ey
Name
Angle Frequency P ower P ower Slope Time Distance
G/n 0 GHz 0 0 ns nm
M/ 0 MHz 0 0 s m
k/m milli degrees kHz 0 0 ms mm
x1
1
degrees Hz dBm dB/Ghz s m
1 4
x1
5 always represents single units .
Other K eys in the Entry Block
4 ENTRY OFF 5 Removes old error messages or active function text from the screen.
\A ctive function text" are messages like START 090 that appear when you
changed the value of a function.
4 PRIOR MENU 5 This key takes you to the previous softkey menu.
4 =MARKER 5 This key can be useful when you are using markers . The easiest way to
explain what 4 =MARKER 5 does is by example . Assume you are making a
frequency response measurement, and the last marker you moved (the
active marker) is sitting at 11 GHz. Now assume you want to change the
center frequency to 11 GHz. All you need to do is press 4
CENTER
5 4
=MARKER
5 .
The marker position (11 GHz) will become the center frequency .
Another way to use 4
=MARKER
5 is to transfer the marker value to another
function. As an example , assume you want to set the display reference line
to the value of the active marker (for example , assume the marker value is
013.2 dB). Press 4 REF V ALUE 5 4 =MARKER 5 , and the display reference line will
change to the value of the active marker .
10-2 Entry Block Controls