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11
2.2.
Operation
2.2.1.
SWITCHING ON
- Connect the instrument to a mains socket with earthing contacts.
- Switch on by means of switch POWER; the scale illumination lights up and a white field in the button-cap
shows that the mains switch is on.
2.2.2.
ADJUSTING THE
FREQUENCY
- Select the required frequency range with one of the range buttons MHz; the corresponding range-scale is
indicated by a LED at the left side of the scale window.
- Adjust to nominal frequency with potentiometer FREQUENCY.
2.2.3.
ADJUSTING THE
MODE
The mode is selected
by
depressing one of the
6
buttons in the left row of buttons.
If
no button has been pressed the generator supplies an unmodulated HF-signal with the adjusted frequency
and amplitude.
Buttons CAL., AM/EXT., AM/1 kHz, FM/EXT. and
FM/1
kHz unlock each other automatically, thus only
one button can be depressed at a time.
Button WOB. may be unlocked by pressing the button a second time, independently of the other buttons.
The mode-buttons may be combined with the frequency-range buttons according the table given below.
Range button
Mode button
(selectable)
(MHz)
CAL
AM FM WOB
0.1 -
0.3
x
x
0.3 _
1
x
x
3
x
x
3 - 10
x
x
10
- 30
x
x
30 - 80
x
x
75 - 110
x
x
x
x
0.4 -
0.5
x
x
x
10.3 - , 1.,
x
x
x
x
extra
WOB+AM
x
x
x
2.2.4. APPLICATION
2.2.4.1. Unmodulated
HF·signal
generator
- Depress the required range button MHz.
- The selected range scale is indicated by a LED.
- Set the pointer at the required frequency by means of potentiometer FREQUENCY.
Not marked frequency values should be interpolated between two marks.
- If necessary, calibrate the frequency at the nearest calibratlon-mark according to sub-para 2.2.4.5.
- Unlock the mode-buttons (left row of buttons).
- Apply the HF-signal, available at BNC connector HF OUT, across a cable to the object to be measured (see
accessories, chapter 1.3.).
- Adjust the required output voltage with potentiometer HF AMPLITUDE.
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