3.2.4.
Wobbulator with variable frequency marker
All push-buttons are off except the concerning one of the RF SWEEP RANGE, SWEEP OFFION and
MARKER OFFION (fig. 5).
It
is
swept about the center frequency, which
is
chosen by button RF SWEEP
RANGE and set by RF CENTER. The sweep width
is
pre-determined due to the range and can be varied
by control RF WIDTH.
The sweep frequency of the ALF signal
is
set by LF FREQUENCY. During fly-back the output ampli-
fier and marker mixer are blanked. During sweep the marked band-pass can be seen on an indicator.
The altitude of the marker
is
set by the MARKER AMPL control.
As in the first chapter 3.2.4. In addition button SWEEP~l~pressed.
It
is
wobbulated at line frequency
(sine). The output and the marker signal are
not
blanked during fly-back. Sweep and fly-back curves
are identically covered by the PHASE control. The X-channel of the indicator
is
fed in via SWEEP OUT
output. The scale-factor
is
set by LF AMPLITUDE; see 3.3.6.3.
3.2.5.
Wobbulator with travelling marker and coupled marker spectrum
According to 3.3.4. with additionally pulled turn-knob MARKER
AMPL.
(fig. 6)
3.2.6.
Frequency counter
All push-buttons off except COUNTER EXT (fig. 7).
3.2.6.1.
In this mode of operation the center frequency of the RF sweep generator can directly
be
measured
in range .4/.5 and adjusted by means of button CENTER. For this connect the sockets RF OUT and
COUNTER IN and push the button .4/.5.
3.2.7.
1
kHz
sine-wave generator
All push-buttons off except MODULATION OFFION; the signal
is
fed to the MODISWEEP OUT socket
(fig. 7).
3.2.8.
Triangle generator
All push-buttons off except SWEEP OFFION and one of the buttons RF SWEEP RANGE. The frequency
is
set by LF FREQUENCY, the amplitude by LF AMPLITUDE. The signal
is
available at SWEEP OUT
(fig.
7).
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