Gate Modulation; Confi Guration Of The Instrument; Selecting Step - Hameg HM8135X Manual

S e t t i n g t h e c o n f i g u r a t i o n
Psk0: –3,14 rad; Psk1: 3,14 rad; Fmod: 1 kHz; Level TTL
Psk0: 0 rad; Psk1: 3,14 rad; Fmod: 1 kHz; Level TTL

GATE modulation

The GATE modulation is made by sampling the output carrier
with a logic signal (GATE) and is characterised by:
– Duty cycle
– Rise / Fall time
– Delay time
The GATE signal (TTL level) is applied to the GATE INPUT
at the rear panel. When the GATE signal is at the state ACTIVE
(optional level 1 or 0), the carrier is present at the output.
After selecting GATE (MODULATION MENU) with the four con-
text sensitive keys , the display shows:
Press one of the four context sensitive keys
active level and for turning the gate ON or OFF. Two triangles
point out the options ,
The return to the previous menu is possible by pressing the
PREV. key and the return to the main display by pressing
the ESC key .
34
Subject to change without notice
for selecting the
, and ON or OFF.
The GATE modulation can be active with another modulation
(for example the GATE modulation with AMsin modulation and
Fmod = 10 kHz)
Example 14 (Fgate: 250Hz Sqr):
CH1— > AM signal (depth: 50%) and GATE modulation
CH2— > signal with GATE modulation
Setting the confi guration

Selecting step

After pressing the STEP function key
Now the step type is selected by pressing one of the four context
sensitive keys . If the parameter is already selected, the step
type can directly be modifi ed by pressing the STEP function key
. Press again the STEP key to go back to previous display.
A new value of the step can be entered from the data keypad
or modifi ed by the digital rotary control
four context sensitive keys
paragraph "Setting parameters".
GATE
, the display shows:
or by one of the
. For more details, refer to the