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Size: 4617
Comment:
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Size: 4676
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 12: | Line 12: |
| [[/Electronics/RF_System/schedule/RF_Generation|schedule]] |
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.
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]
Early Thoughts
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.