8163A/B, 8164A/B, 8166A/B User’s Guide
127
Laser Sources
4
How to Modulate the Optical Output
How to Change Modulation Source
The Modulation Source parameter, [
Mod Src
], allows you to modulate the
output signal. This parameter can be set to Off, Internal, Coherence
Control, or Backplane.
For details of the Off setting
For details of the Internal setting
How to Use the Internal Modulation
For details of the Coherence Control setting
For details of the Backplane setting see
External Digital Modulation using
How to Disable Modulation
If <
Off
> is displayed as the Modulation Source parameter, [
Mod Src
], the
laser source outputs an unmodulated continuous-wave signal.
To disable modulation:
1 Move to the Laser Source channel and press [Details] softkey.
2 Move to the modulation source parameter, [
Mod Src
], and press
Enter
.
3 Move to <
Off
>, by using the cursor key, and press
Enter
.
How to Use the Internal Modulation
The internal modulation is a square wave with a 50% duty cycle. You can
set both the amplitude and the frequency of this signal. The amplitude is
set by the power parameter. This is the maximum output power of the
output signal; at the minimum output power, no power is output.
Figure 75
The Modulated Signal
Output
Power
t
Summary of Contents for 8163A
Page 17: ......
Page 86: ...8163A B 8164A B 8166A B User s Guide 85 Additional Information 2 Figure 47 MAC Address...
Page 99: ......
Page 133: ......
Page 213: ......
Page 298: ...8163A B 8164A B 8166A B User s Guide 297 Applications 10 Figure 183 Low Dynamic Range...
Page 310: ...8163A B 8164A B 8166A B User s Guide 309 Applications 10 Figure 190 Printed Results...
Page 313: ......
Page 345: ......
Page 453: ......