RF Generation Box

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.

Some Thoughts in Early Days

This box will be made from a Metalcraft 2U chassis.
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.

Pictures

This is the current state of the RF Generation Box (picture date: 6May2011). A high resolution version is here RF_Source_picture_hires.jpg
The schematic diagram of this assembly is shown below. The graffle original is attached as a zip file. The pdf version allows high resolution.

List of things to do

Characterization using Blue Phase 1000 test-setup.
- Follow the steps given in Blue Phase 1000 User Manual: Single Channel Two Source Phase Noise measurement, as given in section 3.5.3 of its user manual. The data sheet of a typical Wenzel oscillator of the type we have is here. The data sheets (hard copies) of the two that we have are available in the lab and they should be scanned and attached here_1 and here_2.
1. Wenzel Oscillator phase noise measurement
  1. Since we have two 11.065 MHz Wenzel oscillators we can use one as the reference source and the other (installed) as the Device Under Test (DUT) and follow the steps given in Section 3.5.3 mentioned above.
  2. For the 55 MHz RF Generator Box output, we may have to use the 3-corner-hat method described in this elog
2. Amplitude noise measurement: For 11 and 55 MHz outputs: The same steps as in the phase modulation measurement but with the source and reference being the DUT (split the signal using a splitter)
3. write a LIGO technical document

Parts

RF Generator Parts

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

RF Components

Part	Provider	SN	Q.ty	Status
Power Splitter	Digi Key	ZFRSC-42+	4	ordered

Box Assembly Parts

Part	Function	Description	Provider	SN	Q.ty	Status
Teflon sheet	base mounting plate	12"x24"x3/8"	McMaster	8545K37	2
stainless steel spacers	plate support	1/4" OD, 3/8" Length, 8-32	McMaster	91125A453	20
LIGO std power connector	power feed thru	4-pin	Downs lab	drill room bin 108/6	2
clamps	holding component on plate	drawing	Mike	-	12	cancelled
terminal blocks	power distribution	6-holes	McMaster	7527K46	6
terminal blocks	power distribution	4-holes	McMaster	7527K44	4
spade terminals	power distribution	16-14 wire	McMaster	69145K436	1 pkg (100pcs)
spade terminals	power distribution	12-10 wire	McMaster	69145K438	1 pkg (100pcs)
jumpers	to terminal blocks	-	McMaster	7527K59	1 pkg (25pcs)
screws	frequency multiplier	2-56, 1/2"	McMaster	95345A018	1 pkg (50pcs)
screws	frequency multiplier	2-56, 5/8"	McMaster	95345A019	1 pkg (50pcs)
screw kit	-	Flat, Phillips, 4-40, 6-32, 8-32, 10-24, 10-32	McMaster	91815A224	1 kit (1200pcs)
screw kit	-	Pan, Phillips, 4-40, 6-32, 8-32, 10-24, 10-32	McMaster	93175A212	1 kit (1200pcs)
nut assortment	-	Machine Screw Hex Nut Assortments	McMaster	90625A207	1 kit
washer kit	-	12 sizes	McMaster	92075A212	1kit (1680pcs)

DC Powersupply Parts

Bulkhead Mounted CPC Connector

alt text

DC Voltage Input

Dsub connector, 9pin, female socket.

DigiKey: A32510-ND

Front and Back Panels

Front and back panel prototype designs

Front and Back Panels files for FrontPanelExpress 4.02.

Back Panel

Front Panel

Links

Chub's Web Page with lots of electronics diagrams and pictures

Electronics/RF_System/frequency_generation_box (last edited 2013-04-24 20:44:28 by SureshdoravariATligoDOTorg)

-  ⇤ ← Revision 52 as of 2011-11-01 00:20:37 → 
  Size: 4618
  Editor: KiwamuIzumi
  Comment:
+   ← Revision 66 as of 2013-04-24 20:44:28 → ⇥
  Size: 6499
  Editor: SureshdoravariATligoDOTorg
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 2:
-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.
-Line 6:
+Line 5:
-== Pictures ==
This is the first picture as I start putting it together.
+= RF Generation Box =
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.
-Line 9:
+Line 8:
-<<ImageLink(DSC_2409.JPG, width=1000)>>
+<<BR>>
-------
== Some Thoughts in Early Days ==
-Line 11:
+Line 12:
-== Things to do ==
 1. get parts
 1. cut 5 3x3" copper sheets
+ . This box will be made from a [[https://dcc.ligo.org/DocDB/0000/D070013/002/LIGO-D070013-v2.pdf|Metalcraft 2U chassis]].
-Line 15:
+Line 14:
-== Powering ==
+ . [[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.

<<BR>>
-------


= Pictures =
 . This is the current state of the RF Generation Box (picture date: 6May2011).  A high resolution version is here [[attachment:RF_Source_picture_hires.jpg]]

 .  {{ attachment:RF_Source_picture_lores.jpg|alt text|width=600 }}

 . The schematic diagram of this assembly is shown below.  The [[attachment:RF Source Schematic.zip|graffle]] original is attached as a zip file.  The [[attachment:RF_Source_Schematic.pdf|pdf]] version allows high resolution.

 . {{attachment:RF_Source_Schematic.png|alt text|width=600}}
 
<<BR>>
-------

= List of things to do =

 I. Characterization using Blue Phase 1000 test-setup.
   Follow the steps given in [[attachment:BP_1000_v101_2_-2.pdf|Blue Phase 1000 User Manual]]: Single Channel Two Source Phase Noise measurement, as given in section 3.5.3 of its user manual.  The data sheet of a typical Wenzel oscillator of the type we have is  [[attachment:STR_4_to_30.pdf|here]].  The data sheets (hard copies) of the two that we have are available in the lab and they should be scanned and attached here_1 and here_2.

  1. Wenzel Oscillator phase noise measurement 
    a. Since we have two 11.065 MHz Wenzel oscillators we can use one as the reference source and the other (installed) as the Device Under Test (DUT) and follow the steps given in Section 3.5.3 mentioned above.
    a. For the 55 MHz RF Generator Box output, we may have to use the 3-corner-hat method described in [[http://nodus.ligo.caltech.edu:8080/40m/2869|this elog|target="_blank"]]

  1. Amplitude noise measurement: For 11 and 55 MHz outputs: The same steps as in the phase modulation measurement but with the source and reference being the DUT (split the signal using a splitter)

  1. write a LIGO technical document


## <<ImageLink(DSC_2409.JPG, width=1000)>>

<<BR>>
-------
= Parts =
----
=== RF Generator Parts ===
-Line 30:
+Line 87:
-== Parts ==
+=== RF Components ===
|| '''Part''' || '''Provider''' || '''SN''' || '''Q.ty''' || '''Status''' ||
|| Power Splitter || Digi Key || ZFRSC-42+ || 4 || ordered ||
-Line 32:
+Line 91:
-=== Assembling Parts ===
+=== Box Assembly Parts ===
-Line 35:
+Line 95:
-|| Teflon sheet || base mounting plate || 12"x24"x3/8" || [http://www.mcmaster.com/# McMaster] || 8545K37 || 2 || (./) ||
|| stainless steel spacers || plate support || 1/4" OD, 3/8" Length, 8-32  || [http://www.mcmaster.com/# McMaster] || 91125A453 || 20 || (./) ||
+|| Teflon sheet || base mounting plate || 12"x24"x3/8" || [[http://www.mcmaster.com/#|McMaster]] || 8545K37 || 2 || (./) ||
|| stainless steel spacers || plate support || 1/4" OD, 3/8" Length, 8-32  || [[http://www.mcmaster.com/#|McMaster]] || 91125A453 || 20 || (./) ||
-Line 38:
+Line 98:
-|| clamps || holding component on plate || [attachment:bracket.png drawing] || Mike || - || 12 || cancelled ||
+|| clamps || holding component on plate || [[attachment:bracket.png|drawing]] || Mike || - || 12 || cancelled ||
-Line 51:
+Line 111:
-=== RF Components ===
|| '''Part''' || '''Provider''' || '''SN''' || '''Q.ty''' || '''Status''' ||
|| Power Splitter || Digi Key || ZFRSC-42+ || 4 || ordered ||
-Line 55:
+Line 112:
-=== Powering ===
[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=A33740-ND Bulkhead Mounted CPC Connector]
-Line 58:
+Line 113:
-attachment:CPCpowerConnector.jpg
+=== DC Powersupply Parts ===
[[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=A33740-ND|Bulkhead Mounted CPC Connector]]
-Line 60:
+Line 116:
-=== DC Voltage Input ===
+{{attachment:CPCpowerConnector.jpg|alt text|width=250}}

==== DC Voltage Input ====
-Line 63:
+Line 122:
-[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=A32510-ND DigiKey: A32510-ND]
+[[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=A32510-ND|DigiKey: A32510-ND]]
-Line 67:
+Line 126:
-[attachment:Visio-RFfrequencyBoxMechanics.pdf Front and back panel prototype designs]
+[[attachment:Visio-RFfrequencyBoxMechanics.pdf|Front and back panel prototype designs]]
-Line 71:
+Line 130:
-[attachment:frequencyGenerationBox_BackPanel.fpd Back Panel]
+[[attachment:frequencyGenerationBox_BackPanel.fpd|Back Panel]]
-Line 73:
+Line 132:
-[attachment:frequencyGenerationBox_FrontPanel.fpd Front Panel]
+[[attachment:frequencyGenerationBox_FrontPanel.fpd|Front Panel]]
-Line 75:
+Line 134:
-== Links ==
[http://www.ligo.caltech.edu/~costheld/ Chub's Web Page with lots of electronics diagrams and pictures]
+= Links =
[[http://www.ligo.caltech.edu/~costheld/|Chub's Web Page with lots of electronics diagrams and pictures]]
-Line 78:
+Line 137:
-= Early Thoughts ==
-Line 80:
+Line 138:
-This box will be made from a [https://dcc.ligo.org/DocDB/0000/D070013/002/LIGO-D070013-v2.pdf Metalcraft 2U chassis].
-Line 82:
+Line 139:
-[http://ilog.ligo-wa.caltech.edu:7285/advligo/RfDistributionAmplifier This] is an inspirational model.
-Line 84:
+Line 140:
-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.
+## page was moved from Upgrade 09/RF System/schedule/RF Generation