298 Keysight M8000 Series of BER Test Solutions User Guide
5 Setting up Generator
The spread spectrum clock is characterized by:
•Deviation
•Frequency
•Type
•Profile
•Shape
• Deviation
If the deviation type Center Spread is selected, the deviation can be
changed in two different ways:
• Change the Center Spread value: the bit rate remains unchanged,
while the upper and lower frequency changes according to the
selected deviation. The deviation value specifies ½ p-p value.
• Change the Down Spread value: the upper frequency remains
unchanged, while the bit rate is adjusted. The deviation value
specifies the p-p value.
For some setups, the I/Q modulator’s range limitations require to use
Center Spread instead of Down Spread and adjust the bit rate (and
deviation) accordingly.
If the upper or lower frequency is change, the bit rate will be adjusted
according to the selected deviation. The center frequency corresponds
to the configured bit rate.
To Next Page
Loading...
Need help?
General
