Using the OSICS DFB Module
OSICS User Manual
81
Figure 51: Main Setup – Modulation Source (External)
3.
Turn the rotary knob to put the cursor before
EXTERNAL
and press it to validate your
selection.
The
Main Setup
menu is automatically displayed and the modulation is set to the
selected source.
Step 2 – Set the TTL-level signal generator:
1.
On the OSICS Mainframe rear panel, connect your external digital signal-generator to
the
Mod. in
BNC connector (see
2.
Apply the TTL signal not exceeding the maximum voltage of +5 V and repetition
frequency between 1 Hz and 890 kHz.
The green LED located next to the
Mod. In
connector is lit to indicate that an external
signal-generator is connected.
Step 3 – Set the module modulation source to MAINFRAME:
1.
Access the DFB
Unit Setup
menu (see section
Accessing an OSICS Module Setup
).
2.
Expand the
TTL 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 52: DFB Unit Setup – Modulation Source (Mainframe)
3.
Turn the rotary knob to put the cursor before
MAINFRAME
and press it to validate
your selection.
Main
EXIT
1
2
3
4
5
6
7
8
Main Setup - Modulation source
ESCAPE
▲
Modulation source :
INTERNAL
EXTERNAL
Select a new value.
Main
EXIT
1
2
3
4
5
6
7
8
Unit Setup - Modulation source
ESCAPE
▲
Modulation source :
INTERNAL
MAINFRAME
Select a new value.
