Controlling the Optical Output of all OSICS Modules Simultaneously
OSICS User Manual
41
4.4.1
Setting Up Digital (TTL) Modulation Using the Mainframe
Internal Source
Subject
This modulation setting uses the OSICS Mainframe’s built-in internal oscillator as a source
of TTL-level modulated signals (see
). The main purpose of this setting is
to provide simultaneous and synchronous modulation to several modules installed in the
OSICS Mainframe, or to an external device connected to the OSICS Mainframe
Synchro
output connector.
The range of the frequency of the modulation provided by the OSICS Mainframe is
defined to encompass the frequency requirements of all types of OSICS modules. The
frequency settings for the lower and upper bounds may therefore lie outside of the
modulation capabilities of a particular module, in which case the module's own frequency
range sets the modulation specifications.
The OSICS Mainframe signal generator can provide a TTL signal with a repetition
frequency in the range 123 Hz–1 MHz, but for optimum modulation performance, we
recommend applying modulation frequencies within the specified range of the installed
modules.
Procedure
Step 1 – Set the OSICS Mainframe modulation source to INTERNAL:
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.
Figure 16: Main Setup – Modulation Source (Internal)
3.
Turn the rotary knob to put the cursor before
INTERNAL
and press it to validate your
selection.
The
Main Setup
menu is automatically displayed and the modulation is set to the
selected source.
Main
EXIT
1
2
3
4
5
6
7
8
Main Setup - Modulation source
ESCAPE
▲
Modulation source :
INTERNAL
EXTERNAL
Select a new value.
