Vescent FFC-100, Quick Start Manual

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Last update: 2021/10/06 23:13 ffc:100 https://www.vescent.com/manuals/doku.php?id=ffc:100
https://www.vescent.com/manuals/ Printed on 2021/10/08 00:37
Locking ƒ(CEO)
Navigate to the “CEO Lock” tab and adjust the “Offset DAC 0” slider near the top left by clicking 1.
and dragging the slider until the the data in the Baseband IQ plot is circular ( figure 13 ). This
centers the beat note near the reference frequency. It is also possible to adjust the FFC-100
oscillator current on its front panel to make this adjustment.
Fig. 13: Centering ƒ(CEO) on reference frequency (Baseband IQ optimization)
Press the “Lock” button (
figure 14 , top middle). If the system doesn’t lock, change the VCO sign 2.
to the opposite polarity (top right) and try again. If the system still won't lock, try lowering the
K
p
value (bottom left).