LLRF9/500 Specifications
Parameter Description
RF Inputs
Number of channels 9
Center frequency (MHz ) 500
Bandwidth (MHz ) 6
Full-scale input level (dBm) +2
Channel-to-channel isolation (dB) 68
Spurious-free dynamic range (dB) 66
Readout rate (1/s) 10
RF outputs
Klystron drive outputs 2
Full scale klystron drive (dBm) +9
Spare/calibration outputs 2
Spare output full scale (dBm) -14
Feedback processing
Vector sum calculation 2 channels
Feedback loops Direct and integral
Direct loop delay (ns ) 270
Real-time reference tracking Yes
Setpoint modulation
Trigger source Internal or external
External trigger inputs 2 (up, down)
External trigger level TTL/LVTTL , optoisolated
Ramp profile steps 512
Time per step 70 ns – 37 ms
Interlocks
External interlock interface Daisy chain input and output
External interlock input TTL/LVTTL , optoisolated
RF input interlock Overvoltage
Worst-case interlock error (dB) -0.09
Interlock timestamp resolution (ns ) 35
Diagnostics
Time domain
Raw waveform acquisition channels 12
Samples per channel 24576
Acqusition trigger Hardware/software
Acquisition mode Adjustable pre/post-trigger
Acquisitions per second, internal trigger 10
Signal source multiplexer ADC , cavity sum, loop error, klystron drive
Frequency domain
Network analyzer Yes
Spectrum analyzer Yes
Excitation amplitude adjustment 6 dB steps, from 0 to -78 dB
Number of points 1024
Signal source multiplexer Cavity 1, cavity 2, loop error, klystron drive, loopback
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