Using the OSICS T100 Module
OSICS User Manual
185
13.7.1 Setting Up Digital (TTL) Modulation Using the T100 Module
Internal Source
Subject
Digital modulation capabilities of the T100 module is within the 50 Hz–1 MHz frequency
range (see the T100 specifications).
Internal digital modulation uses the T100 module's built-in TTL-level signal generator (see
The T100 module’s built-in TTL signal-generator can provide a TTL modulation signal in
the range of 153 Hz–1 MHz, but for optimum modulation performance we recommend
applying modulation frequencies within the specified range of the T100 module.
The resulting modulated optical output signal follows a pattern as shown in the following
figure.
Figure 136: TTL-Modulated Output Power Signal (T100 Module)
Procedure
Step 1 – Set the module modulation source to INTERNAL:
1.
Access the T100
Unit Setup
Accessing an OSICS Module Setup
).
2.
Expand the
Modulation
menu and enter the
Source
sub-menu.
The
Modulation source
sub-menu appears and the cursor automatically points to
the current modulation source setting.
Figure 137: T100 Unit Setup – Modulation Source (Internal)
3.
Turn the rotary knob to put the cursor before
INTERNAL
and press it to validate your
selection.
The T100
Unit Setup
menu is automatically displayed and the modulation is set to
the selected source.
Time Reference
Power Setting
2 x Power Setting
Optical Output
Power
Main
EXIT
1
2
3
4
5
6
7
8
Unit Setup - Modulation source
ESCAPE
▲
Modulation source :
INTERNAL
MAINFRAME
Select a new value.
