Generation%201%20and%202%20NanoBPM%20Performance%20Characteristics

1
Generation 1 and 2 NanoBPM Performance
Characteristics

• By Neil Chatterjee, Michael Levashov, and Guan
  Wang
• SLAC Summer Students

Available online at lthttp//www-project.slac.stanf
ord.edu/lc/ local/NanoBPM/documents/NanoBPM_Gen1an
d2_Performance.pptgt
2
Gen1 BPM1 Gain Test Setup

• LO set at 6.406 GHz 10 dBm
• RF Input set at 6.426 GHz varying power

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Gen1 BPM1 Gain Test Setup
Total Gain Apparatus Gain BPM Gain
(previous slide)
(attenuator/cable)
(next 2 slides)

• RF Input set at 6.426 GHz varying power

4
Gen1 BPM1 Gain

• Channel X

1 dB Compression _at_ -25.6 dBm Input
5
Gen1 BPM1 Gain

• Channel Y

1 dB Compression _at_ -25.4 dBm Input
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Gen2 Reference Cavity Gain
1 dB Compression _at_ -18.2 dBm Input
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Gen1 BPM1 IP3 Test Setup

• RF Input 1 and 2 set at 6.426 /- .005 GHz
  varying power
• Variable Attenuator 1 set at
• 28 dB (-60 to -45 dBm input) 22 dB (-44 to -30
  dBm input)
• Variable Attenuator 2 set at
• 0 dB (-60 to -50 dBm input) 6 dB (-49 to -45 dBm
  input) 20 dB (-44 to -30 dBm input)
• 10 dB Internal Attenuation is from spectrum
  analyzer

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Gen1 BPM1 IP3

• Channel X With 0, 6, and 20 dB Attenuation _at_
  Spec. A. Input

Avg Inner Peak
IP3 45
Avg Outer Peak
20 dB
0 dB
6 dB
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Gen1 BPM1 IP3

• Channel Y With 0, 6, and 20 dB Attenuation _at_
  Spec. A. Input

Avg Inner Peak
IP3 45
20 dB
Avg Outer Peak
0 dB
6 dB
10
Gen2 Reference Cavity IP3
Avg Inner Peak
IP340 dBm
Avg Outer Peak
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Gen1 BPM1 Noise Test Setup

• LO set at 6.406 GHz 10 dBm

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Generation 1 BPM1 Noise

• Channel X LO On, RF Stage On, IF Stage On

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Gen 2 Reference Cavity Noise

• Channel X LO On, Devices On

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Generation 1 BPM1 Noise

• Channel Y LO On, RF Stage On, IF Stage On

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Gen 2 Reference Cavity Noise

• Channel Y LO On, Devices On, No LO Filter

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Gen 2 Middle BINP BPM Noise

• Channel X LO On, Devices On, No LO Filter

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Pulse Effects on Amplifier

• Pulses sent out at 1 microsec intervals
• Measured
• Output waveforms from Gen2 electronics
• DC Voltage _at_ amplifiers

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Gen 2 RF Amplifier Waveform
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Gen 2 IF Amplifier Waveform
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Gen 2 LO Amplifier Waveform
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Gen 2 IF Amplifier Waveform
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Gen 2 LO Amplifier Waveform