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HP 4278A - Page 29

HP 4278A
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5. The 1/2 in the lower right-hand corner of the display indicates two pages of softkey
labels, and that page one is now displayed. Press the PREV or NEXT key to display
additional softkey label pages.
6. To select a measurement parameter, press the corresponding softkey. The 1. marker
will be displayed next to the parameter you selected. Press the `Cp-G' softkey.
7. Press the 'return' softkey. The initial softkey label page will be displayed.
Setting the Test Signal
8. Press the 'SIGNAL SOURCE' softkey. From this page, you can set the frequency
and voltage of the test signal.
9. Press the 'FRED' softkey. Confirm that 1kHz is the presently set frequency (default
setting), and that 1kHz is displayed in the FREQ : field (top line of the LCD). Press
the 'return' softkey.
10. Press the 'OSC (V)=' softkey. The input Line (third line from the bottom of the LCD)
displays "OSC LVL--1.0V", and the OSC LVL : field (second line from the top) also
displays the the set test signal voltage.
For practice, change the test signal voltage to 0.9V by pressing the .9 numeric EN-
TRY keys, and by pressing the ENTER key. Confirm that 'OSC LVL--_0.9V" is dis-
played on the Input Line and in the OSC LVL : field. You can also edit the test signal
voltage by using the ( fc7 or [J) CURSOR keys to position the cursor under the digit
you wish to change and by entering the desired value.
11. Press the 'return' softkey.
Setting Measurement Conditions
12. Press the 'HI-ACC MODE' softkey. Confirm that OFF el MHz is selected (default
setting). Because the high accuracy mode is valid for 1MHz measurements only, do
not change the high accuracy mode setting. Press the 'return' softkey.
13. Press the ‘MEAS RANGE' softkey. Confirm that AUTO is selected (default setting)
and is displayed in the RANGE : field (fourth line from the top of the LCD). Press the
'return' softkey.
14. Press the `MEAS TIME' softkey, then press the 'INTEG TIME' softkey. Confirm that
LONG is selected (default setting) and is displayed in the INTEG : field (top LCD line),
Press the 'return' softkey.
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