13
3.2.2.4. Selecting the level.
The signal’s output level can be set on the
OUTPUT
jack, using the
OUTPUT LEVEL
rotary knob, between 10mV
pp
and 10.0V
pp
(on
50
Ω
load), regardless of the waveform type. See section 3.1.2 for details regarding the setting of the level value (see example from
section 3.2.5.2).
The –20dB LED will be lighted if the –20dB attenuation is engaged on the main signal output path.
3.2.2.5. Selecting the offset.
The DC level added to the output signal on
OUTPUT
jack can be set by using the
DC OFFSET
rotary knob between – 5.000V and +
5.000V (on 50
Ω
load), regardless of the waveform type. See section 3.1.3 for details regarding the setting of the offset value (see
example from section 3.2.5.2).
The
DC OFFSET LED
lights if the offset value is not 0.
3.2.2.6. Selecting the duty cycle.
The duty cycle of the output signal on the
OUTPUT
jack can be set by using the
DUTY CYCLE
rotary knob between 0% and 100%,
regardless of the waveform type. See section 3.1.4 for details regarding setting of the offset value (see example from section 3.2.5.2).
Attention
:
The true meaning of duty cycle applies only to the square wave. By turning the DUTY CYCLE knob, the symmetry
of the waveform will be changed for the sine wave and triangle wave. The sine wave will cause distorted wave
shapes and the triangle will cause ramp waves.
The
DUTY CYCLE LED
lights when output signal is asymmetric.
See section 3.2.5.5 for waveform examples.
3.2.2.7 Selecting output TTL/CMOS level.
You can set the level of the signal outputted on
TTL/CMOS
jack using the
TTL/CMOS
button and
CMOS LEVEL
rotary knob. This
signal’s frequency is the same as the signal’s frequency outputted on
OUTPUT
jack.
If
CMOS
output style is enabled, the output level can be set b 4.0V and +14.0V (unloaded).
See section 3.1.5 for details regarding setting of the
CMOS
level (see example from section 3.2.5.2).
3.2.2.8 Selecting sweep width
The width of the frequency range sweep can be set by changing the value of a ratio. This ratio represents the ratio applied to sweep start
frequency in order to determine the sweep stop frequency.
To do so turn the
SWEEP WIDTH
knob until it reaches the desired ratio. This ratio can be changed between 1:1 and 1:100. See section
3.1.7 for details regarding the sweep width setting (see also example from section 3.2.5.2).
3.2.2.9 Selecting sweep time
The time of a single complete frequency range sweep can be set by turning the
SWEEP TIME
knob until the desired time is reached.
The time sweep can be changed between 0.01s and 30.00s. See section 3.1.6 for details regarding the sweep time setting (see also
example from section 3.2.5.2).
3.2.2.10 Selecting type of sweeping
The way the output frequency is modified can be set in a linear or in a logarithmic mode by pressing the
LIN/LOG
button. This button
has two associated LED’s to indicate which way is active,
LIN
and
LOG LED
.
When
INTERNAL SWEEP
mode is not active, the
LIN/LOG
button action is disabled and none of the LED associated is lighted.
The way the change in frequency is selected does not affect any sweep parameters.
3.2.3 FREQCOUNTER (Frequency Counter mode)
This mode is used for measuring the signal applied on the
VCG SWEEP/COUNTER IN
input jack. The applied signal must be from
50mV
p-p
up to 10V
p-p
.
The unit is capable of measuring frequencies from 5 Hz to 100 MHz, using 1 Hz resolution.
Attention:
Applying levels in excess of above +10.0V
p-p
on VCG SWEEP/COUNTER IN input jack, can damage the input.
