User guide

To change the de-emphasis amplitude ratio value (for details see “Understanding
the N4916A/B De-Emphasis Signal Converter” on page 37), click inside the text
field and either:
• Enter the desired value directly with the numeric keyboard.
• Use the knob by the numeric keyboard to set the value.
You can toggle between dB and percent. Toggling does not change the value.
N O T E
It is possible to set the de-emphasis ratio to a negative dB value (amplification).
This allows you to generate a pre-cursor de-emphasis for N4916A.
C A U T I O N
In this case there is a risk that you damage your device!
If you intend to generate a pre-cursor de-emphasized signal, refer to for the
characteristics and dangers.
Controlling the N4916B De-Emphasis Signal Converter
For N4916B, you have two (post–cursor), one pre-cursor and the corresponding
unit.
Set the values as following:
• Post-Cursor1: -12.04db to 0db
• Post-Cursor2: -8db to 0db
• Pre-Cursor: 0db to 12.04 db
To change any of the cursor's value (for details see “Understanding the N4916A/
B De-Emphasis Signal Converter” on page 37), click inside the text field and either:
• Enter the desired value directly with the numeric keyboard.
• Use the knob by the numeric keyboard to set the value.
You can toggle between dB and percent. Toggling does not change the value.
N O T E
When N4916A/B De-Emphasis Signal Converter is connected then the X offset and
Output Blanking will not be visible in the PG-Data Output window.
Setting up the Pattern Generator 4
Agilent J-BERT N4903B High-Performance Serial BERT 133