System Block Diagram 


Chassis IO Description

MOD1 Chassis Channel Summary
ChannelsSliceRx/TxFreq Typ (MHz)Freq Min (MHz)Freq Max (MHz)RF Power* Typ (dBm)RF Power Min (dBm)RF Power Max (dBm)Notes
Kly1 Forward  (Feedback) Chassis 0 Rx0Rx

2997.84

2900310015 
20 LN:HSD2 Ch7
Kly1 ReverseChassis 0 Rx0Rx

2997.84

29003100

20 
AS1 Forward Chassis 0 Rx1Rx

2997.84

29003100

20 LN:HSD2 Ch3
AS1 ReverseChassis 0 Rx1Rx

2997.84

29003100

20 LN:HSD2 Ch5
AS1 Load FWRChassis 0 Rx2Rx

2997.84

29003100

20 LN:HSD2 Ch1
SBB ForwardChassis 0 Rx2Rx

2997.84

29003100

20 
MO LINACChassis 0 Rx3Rx

499.64

4905100-1515
Mod1 drive

Chassis 0

TX0

Tx

2997.84

290031000
5
LINAC (Mod2) Chassis Channel Summary
ChannelsSliceRx/TxFreq Typ (MHz)Freq Min (MHz)Freq Max (MHz)RF Power* Typ (dBm)RF Power Min (dBm)RF Power Max (dBm)Notes
Kly2 Forward  (Feedback) Chassis 1 Rx0Rx

2997.84

2900310015
20 LN:HSD2 Ch8
Kly2 ReverseChassis 1 Rx0Rx

2997.84

29003100

20 
AS2 Forward Chassis 1 Rx1Rx

2997.84

29003100

20 LN:HSD2 Ch4
AS2 ReverseChassis 1 Rx1Rx

2997.84

29003100

20 LN:HSD2 Ch6
AS2 Load FWRChassis 1 Rx2Rx

2997.84

29003100

20 

LN:HSD2 Ch2
SBB ReverseChassis 1 Rx2Rx

2997.84

29003100

20 
MO LINACChassis 1 Rx3Rx

499.64

4905100-1515
Mod2 drive

Chassis 1

TX0

Tx

2997.84

290031000
5




Digital LINAC LLRF Controller Chassis - Modulator 1


New SystemOld System (pre 2025 Install)
IO

Calibration Old System IO
Measurement

Source Power Estimate
RF Monitor attenuationFront End variable attenuation
Cable or Port Name

Record Distribution Chassis attenuation

Absolute Phase Noise

Spectrum (max temp)

AS1 Load FWD



LINAC1 Load FWR

Patch Panel
LI1838

PG12


S Band Buncher FWD

86 dBm - 76.8 coupling = 9.2 dBm at cable input




Patch Panel
LI1838		PG9


AS1 FWD



LINAC1 Forward

Patch Panel
LI1838PG8

PG11


AS1 REV



LINAC1 Reverse

Patch Panel
LI1838PG8

PG10


KLY1 FWD102


RF Distribution Chassis LI1824FE IN J6


KLY1 REV82


RF Distribution Chassis LI1824RE IN J1


MO0


500 GHz to 3 GHz Multiplier LI1810500 MHz IN PG1


MOD2 Drive



Distribution Chassis Phase Control LI1834

Amplifier 1 Drive, J5


Chassis Calibration and Upgrade Comparison

Digital LINAC LLRF Controller Chassis - Modulator 2
New System
Old System (pre 2025 Install)
New System IOCalibration


Measurements

RF Monitor attenuationFront End variable attenuationChassis NameCable or Port Name

Record Distribution Chassis attenuation

Absolute Phase Noise

Spectrum (max temp)

AS2 Load FWD


Input power < (47 dBm + 30 dB) 77 dBm (Filter constraint)

Input power < (20 dBm + 33 dB) 53 dBm (Detector constraint)


LINAC2 Load FWR

Patch Panel
LI2120

PG8


S Band Buncher REV


Input power < (47 dBm + 10 dB) 57 dBm (Filter constraint)

Input power < (20 dBm + 10 dB) 30 dBm (Detector constraint)


Patch Panel
LI1838		PG8




AS2 FWD


Input power < (47 dBm + 30 dB) 77 dBm (Filter constraint)

Input power < (20 dBm + 33 dB) 53 dBm (Detector constraint)

84 dB coupling, input power < -30 dBm



LINAC2 Forward

Patch Panel
LI2120

PG7


AS2 REV


Input power < (47 dBm + 20 dB) 67 dBm (Filter constraint)

Input power < (20 dBm + 20 dB) 40 dBm (Detector constraint)


LINAC2 Reverse

Patch Panel
LI2120

PG6


Kly2 FWD

RF Distribution Chassis LI2131FE IN J6


Kly2 REV

RF Distribution Chassis LI2131RE IN J1


MO

500 GHz to 3 GHz Multiplier LI1810500 MHz IN PG1


MOD2 Drive


Distribution Chassis Phase Control LI1834

Amplifier 2 Drive, J6