6
DUTY CYCLE LED.
LED is associated with
DUTY CYCLE
knob and lights when the waveform is asymmetric.
CMOS LEVEL knob.
This knob controls the changing of the CMOS level on the output of
TTL/CMOS
jack. This knob has
meaning only for
EXTERNAL VCG
and
INTERNAL SWEEP
. It is only active if
TTL/CMOS
button enables it. The CMOS LED
must be lit.
VCG SWEEP/COUNTER IN jack.
Input jack is used to control the output frequency in
EXTERNAL VCG
mode or as
frequency count input in
FREQCOUNTER
mode.
TTL/CMOS jack.
Output jack is used for supplying a fixed TTL style signal or variable CMOS style signal, depending of
the
TTL/CMOS
button, whose frequency is the same as the signal’s frequency on the main output,
OUTPUT
jack.
DC OFFSET knob.
This knob controls the offset level added to the signal outputted on the
OUTPUT
jack. It has an LED
associated,
DC OFFSET LED
, which lights when the offset added is not zero. This knob has meaning only in
EXTERNAL VCG
and
INTERNAL SWEEP.
DC OFFSET LED.
LED associated with
DC OFFSET
knob, lights when the value of offset added to the signal on the
OUTPUT
jack is not zero.
OUTPUT LEVEL knob.
This knob controls the output level on main output,
OUTPUT
jack. This knob has meaning only in
EXTERNAL VCG and INTERNAL SWEEP.
OUTPUT jack.
The main output jack, used to supply the desired waveform, defined by frequency, level, offset, duty cycle
for
EXTENAL VCG
mode and moreover time and width sweep for
INTERNAL SWEEP
mode.
3. Operating the Model 4017B.
There are 2 modes of controlling the unit and 3 modes of operating the unit. One of the control modes uses the front panel; the other
mode is by remote, using the RS232 interface. Each mode of control excludes the other. When you are using the front panel you cannot
control the unit by remote. Engaging remote mode, using special command, deactivates the use of front panel controls. Disengaging the
remote control by using a special command enables the use of front panel button.
The 3 modes of operating are
EXTERNAL VCG
(external voltage control generator),
INTERNAL SWEEP
and
FREQCOUNTER
(frequency counter).
Section 3.1. - Mode description will describe the setting of operating modes using front panel controls. Section 3.2.-Remote operation,
will have a complete description of the remote control mode.
3.1.
Parameter’s setting
3.1.1. Frequency setting (except FREQCOUNTER mode).
The f
requency setting depends on the mode being worked. On
EXTERNAL VCG
mode, output frequency depends on the value set by
turning the
FREQUENCY
knob and the DC value applied to
VCG/SWEEP
input jack. On
INTERNAL SWEEP
mode, since
frequency is sweeping a range, the value set by turning the
FREQUENCY
knob represents the start frequency of the range being swept.
For all modes (except
FREQCOUNTER
mode), frequency is displayed on the first line, using a 5-digit field and a decimal point,
whose position depends on the selected range. The unit is displayed after the frequency value field. The frequency range used is always
displayed on the right of the first line.
33
34
35
36
37
38
39
40
