Using the OSICS DFB Module
80
OSICS User Manual
Figure 50: DFB Unit Setup – Modulation Control (On)
3.
Turn the rotary knob to put the cursor before the wanted modulation:
•
ON
for standard modulation.
•
ON INVERTED
for reverse modulation
4.
Press the rotary knob to validate your selection.
Modulation is enabled. In the
System Status
screen, the letter
M
is displayed in the
channel
Info
field of the corresponding module.
5.
To stop the modulation: in the
Control
sub-menu, select
OFF
.
8.5.3
Setting Up Digital (TTL) Modulation Using an External Source
Subject
External digital-modulation is achieved by applying a digital signal to the BNC
Mod. In
connector located on the OSICS Mainframe rear panel (see
). This allows
all the modules (or an external device connected to the OSICS Mainframe
Synchro
output connector) to be modulated in a synchronous way by means of an external source.
The OSICS Mainframe distributes the external modulated-signal to all installed modules
in order to synchronize all modules with a single modulated signal, amplitude, and
frequency.
For optimum stability of the modulated signals, we recommend applying a digital
modulation in the specified range of the modules.
Before Starting
Make sure you have a digital-signal generator.
Procedure
Step 1 – Set the OSICS Mainframe modulation source to EXTERNAL:
1.
Access the
Main Setup
menu (see section
Accessing the OSICS Mainframe Main Setup
).
2.
Enter the
Source
sub-menu as follows:
a. Turn the rotary knob to put the cursor before the
Modulation
menu and press
the knob to expand it.
b. Turn the rotary knob to put the cursor before the
Source
sub-menu and press
the knob to enter it.
The
Modulation source
sub-menu appears and displays the current selected
modulation source.
Main
EXIT
1
2
3
4
5
6
7
8
DFB Unit Setup - Modulation control
ESCAPE
▲
TTL Modulation control :
OFF
ON
Select a new value.
ON INVERTED
