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Size: 4665
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Size: 6153
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| Deletions are marked like this. | Additions are marked like this. |
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| This is the first picture as I start putting it together. | . This is the first picture as I start putting it together. |
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| <<ImageLink(DSC_2409.JPG, width=1000)>> | . attachment:pic_RFgenbox.jpg ## <<ImageLink(DSC_2409.JPG, width=1000)>> |
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| [/Electronics/RF_System/schedule/RF_Generation] | [[Electronics/RF_System/schedule/RF_Generation|schedule]] |
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| = Early Thoughts = | |
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| This box will be made from a [https://dcc.ligo.org/DocDB/0000/D070013/002/LIGO-D070013-v2.pdf Metalcraft 2U chassis]. | [[BR]] ------- = Some Thoughts in Early Days = |
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| [http://ilog.ligo-wa.caltech.edu:7285/advligo/RfDistributionAmplifier This] is an inspirational model. | . This box will be made from a [https://dcc.ligo.org/DocDB/0000/D070013/002/LIGO-D070013-v2.pdf Metalcraft 2U chassis]. |
| Line 85: | Line 88: |
| The box will contain a crystal oscillator to generate the 11 MHz sideband. From that a frequency multiplier will provide the 55MHz modulation. | . [http://ilog.ligo-wa.caltech.edu:7285/advligo/RfDistributionAmplifier This] is an inspirational model. . The box will contain a crystal oscillator to generate the 11 MHz sideband. From that a frequency multiplier will provide the 55MHz modulation. |
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| The box will also provide the signals for the demodulation at the LSC rack. | . The box will also provide the signals for the demodulation at the LSC rack. |
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| The amplitude of the modulation signals going to the EOM will be tunable by means of two mechanical knob-attenuators and by Voltage Controlled Attenuators (VCA). | . The amplitude of the modulation signals going to the EOM will be tunable by means of two mechanical knob-attenuators and by Voltage Controlled Attenuators (VCA). |
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| The front panel will have the following inputs: * 11 MHz * 11MHz VCA * 55MHz VCA |
. The front panel will have the following inputs: * 11 MHz * 11MHz VCA * 55MHz VCA |
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| This will be the outputs in the front panel: * 11 MHz to the EOM * 11 MHz to the LSC * 55 MHz to the EOM * 55 MHz to the LSC |
. This will be the outputs in the front panel: * 11 MHz to the EOM * 11 MHz to the LSC * 55 MHz to the EOM * 55 MHz to the LSC |
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| the front panel will also host knobs of the two attenuators. | . the front panel will also host knobs of the two attenuators. ## page was moved from Upgrade 09/RF System/schedule/RF Generation == List of things to do == I. Construction of Frequency Generation Box 1. coax cables order (1hr): measure lengths, compile list, give list to Steve 1. protection capacitors (1hr): design, ordering/stealing from Downs 1. cooling system installation (1/2 day) * cutting mica board, drill board, drill back panel, drill holes for cooling fins, install cooling fins, install LNVRs 1. external powering (1/2 day) * drill main hole and screw holes for D-connector, get D-connector pins from Downs, connect metal pins to connector, drill screw holes for the power terminal block on the right end side; drill hole for power switch; get poer switches from wilson house; connect power switches to terminal block 1. power cables routing (1/2 day) * connect cables from the D-connector's pins to the power terminal block, interconnect the ground of the LNVRs, solder the LNVRs ground connections, connect power capacitors, 1. front and back panel design (2hr) I. Characterization 1. prepare check list 1. write a LIGO technical document 1. signal amplitude measurement: amplitude at the EOM outputs and at the demod outputs 1. phase noise measurement: 11MHz output and 55MHz output I. Frequency Box Installation 1. connection to the rack power 1. cable connections |
The 40m Upgrade Frequency Generation Box is going to be installed in the 1Y1 rack. It will be used to generate the modulation and the demodulation frequencies.
Contents
Pictures
- This is the first picture as I start putting it together.
- attachment:pic_RFgenbox.jpg
Things to do
- get parts
- cut 5 3x3" copper sheets
Powering
Element |
DC In |
Max Amp In |
5x multiplier |
+15 |
0.200 |
ZFL-1HADX Ampl |
+15 |
0.115 |
voltage contr'd att. 1 |
+15 |
0.020 |
voltage contr'd att. 2 |
+15 |
0.020 |
11 MHz oscillator |
+15 |
0.330 |
29.5 MHz oscillator |
+15 |
0.330 |
Total 15V |
1.015 |
|
ZHL-2X-S 1 |
+24 |
0.600 |
ZHL-2X-S 2 |
+24 |
0.600 |
ZHL-2X-S 3 |
+24 |
0.600 |
Total 24V |
1.800 |
|
Parts
Assembling Parts
Part |
Function |
Description |
Provider |
SN |
Q.ty |
Status |
Teflon sheet |
base mounting plate |
12"x24"x3/8" |
8545K37 |
2 |
|
|
stainless steel spacers |
plate support |
1/4" OD, 3/8" Length, 8-32 |
91125A453 |
20 |
|
|
LIGO std power connector |
power feed thru |
4-pin |
Downs lab |
drill room bin 108/6 |
2 |
|
clamps |
holding component on plate |
[attachment:bracket.png drawing] |
Mike |
- |
12 |
cancelled |
terminal blocks |
power distribution |
6-holes |
7527K46 |
6 |
|
|
terminal blocks |
power distribution |
4-holes |
7527K44 |
4 |
|
|
spade terminals |
power distribution |
16-14 wire |
69145K436 |
1 pkg (100pcs) |
|
|
spade terminals |
power distribution |
12-10 wire |
69145K438 |
1 pkg (100pcs) |
|
|
jumpers |
to terminal blocks |
- |
7527K59 |
1 pkg (25pcs) |
|
|
screws |
frequency multiplier |
2-56, 1/2" |
95345A018 |
1 pkg (50pcs) |
|
|
screws |
frequency multiplier |
2-56, 5/8" |
95345A019 |
1 pkg (50pcs) |
|
|
screw kit |
- |
Flat, Phillips, 4-40, 6-32, 8-32, 10-24, 10-32 |
91815A224 |
1 kit (1200pcs) |
|
|
screw kit |
- |
Pan, Phillips, 4-40, 6-32, 8-32, 10-24, 10-32 |
93175A212 |
1 kit (1200pcs) |
|
|
nut assortment |
- |
Machine Screw Hex Nut Assortments |
90625A207 |
1 kit |
|
|
washer kit |
- |
12 sizes |
92075A212 |
1kit (1680pcs) |
|
RF Components
Part |
Provider |
SN |
Q.ty |
Status |
Power Splitter |
Digi Key |
ZFRSC-42+ |
4 |
ordered |
Powering
[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=A33740-ND Bulkhead Mounted CPC Connector]
attachment:CPCpowerConnector.jpg
DC Voltage Input
Dsub connector, 9pin, female socket.
[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=A32510-ND DigiKey: A32510-ND]
Front and Back Panels
[attachment:Visio-RFfrequencyBoxMechanics.pdf Front and back panel prototype designs]
Front and Back Panels files for FrontPanelExpress 4.02.
[attachment:frequencyGenerationBox_BackPanel.fpd Back Panel]
[attachment:frequencyGenerationBox_FrontPanel.fpd Front Panel]
Links
[http://www.ligo.caltech.edu/~costheld/ Chub's Web Page with lots of electronics diagrams and pictures]
Some Thoughts in Early Days
This box will be made from a [https://dcc.ligo.org/DocDB/0000/D070013/002/LIGO-D070013-v2.pdf Metalcraft 2U chassis].
[http://ilog.ligo-wa.caltech.edu:7285/advligo/RfDistributionAmplifier This] is an inspirational model.
- The box will contain a crystal oscillator to generate the 11 MHz sideband. From that a frequency multiplier will provide the 55MHz modulation.
It will be possible to opt between an external source of the 11MHz modulation rather than the internal oscillator.
- The box will also provide the signals for the demodulation at the LSC rack.
- The amplitude of the modulation signals going to the EOM will be tunable by means of two mechanical knob-attenuators and by Voltage Controlled Attenuators (VCA).
- The front panel will have the following inputs:
- 11 MHz
- 11MHz VCA
- 55MHz VCA
- This will be the outputs in the front panel:
- 11 MHz to the EOM
- 11 MHz to the LSC
- 55 MHz to the EOM
- 55 MHz to the LSC
- the front panel will also host knobs of the two attenuators.
List of things to do
- Construction of Frequency Generation Box
- coax cables order (1hr): measure lengths, compile list, give list to Steve
- protection capacitors (1hr): design, ordering/stealing from Downs
- cooling system installation (1/2 day)
- cutting mica board, drill board, drill back panel, drill holes for cooling fins, install cooling fins, install LNVRs
- external powering (1/2 day)
- drill main hole and screw holes for D-connector, get D-connector pins from Downs, connect metal pins to connector, drill screw holes for the power terminal block on the right end side; drill hole for power switch; get poer switches from wilson house; connect power switches to terminal block
- power cables routing (1/2 day)
- connect cables from the D-connector's pins to the power terminal block, interconnect the ground of the LNVRs, solder the LNVRs ground connections, connect power capacitors,
- front and back panel design (2hr)
- Characterization
- prepare check list
- write a LIGO technical document
- signal amplitude measurement: amplitude at the EOM outputs and at the demod outputs
- phase noise measurement: 11MHz output and 55MHz output
- Frequency Box Installation
- connection to the rack power
- cable connections