40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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ID Date Authorup Type Category Subject
  5309   Fri Aug 26 15:59:33 2011 steveUpdateGeneraldrawer cabinet moves in

manufacturer info

Jamie and Shuresh moved in Jenne's 11 drawers cabinet and relocated old note book boxes on the inside of the vac tube.

Attachment 1: P1080192.JPG
P1080192.JPG
  5322   Tue Aug 30 10:49:29 2011 steveUpdateSUSBS & PRM damping restored

I have restored the damping of BS and PRM. Today is janitor day. He is shaking things around the lab.

  5328   Wed Aug 31 11:37:56 2011 steveUpdateGreen Lockingshutter in place at east end

Uniblitz mechanical shutter installed in the green beam path at ETMY-ISCT  The remote control cable has not been connected.

  5331   Thu Sep 1 11:03:22 2011 steveUpdateVACback ground rga scan

The RGA back ground at day 29 of this vent.

Attachment 1: v70-bg-d29scan.jpg
v70-bg-d29scan.jpg
Attachment 2: vent70tempres.jpg
vent70tempres.jpg
  5332   Thu Sep 1 15:07:45 2011 steveUpdateSUSwhy ITMY is moving more ?

Atm1, ITMY and the SRM are on the same isolation stack.  So why does  the SRM move twice as much?

Atm2, We should check the ITMY  SIDE_OSEM before pump down. Anatomically correct, beautiful picture taken by Kiwamu on August 22

Attachment 1: itmy_srm_etmx.jpg
itmy_srm_etmx.jpg
Attachment 2: P8220152.JPG
P8220152.JPG
  5333   Thu Sep 1 15:59:46 2011 steveUpdateSUSlight doors on at the ITMs

Suresh, Kiwamu and Steve

Heavy chamber doors replaced by light ones at  ITMX-west and ITMY-north locations.

  5341   Tue Sep 6 08:05:53 2011 steveUpdateSUSITMX must be touching

Quote:

The new ITMX was aligned by changing the DC biases.

The resultant DC biases are reasonably small.

C1:SUS-ITMX_PIT_COMM = -0.2909

C1:SUS-ITMX_YAW_COMM = -0.0617

 

The alignment was done by trying to resonate the green light in the X arm cavity.

The spot position of the green light on the ITMX mirror looked good. This was confirmed by inserting a sensor card.

I did the OSEM mid-range adjustment and the rotation adjustment but at the end the OSEM DC voltage has changed due to the DC bias operation.

The OSEM rotation was approximately optimized so that all the face shadow sensors are sensitive to the POS motion but the SIDE shadow sensor is insensitive to the POS motion.

It needs a free swinging diagnosis.

 ITMX OSEMs   UL 1.8V,   UR 1.7V,   LR 0V,   LL 0V,   SD 1.3V  at the same bias setting shown above. May be a lose earth quake tip?or magnet is touching?

Attachment 1: osemITMX.jpg
osemITMX.jpg
  5355   Wed Sep 7 08:14:01 2011 steveUpdateSUSfinal OSEM check

All fine, except ITMX_sensor_UL's  60  counts deep hoop for an hour.

Attachment 1: finalcheck.jpg
finalcheck.jpg
Attachment 2: ITMX10min.jpg
ITMX10min.jpg
Attachment 3: finalsum.png
finalsum.png
  5357   Wed Sep 7 12:03:49 2011 steveUpdateVACPump down has started

Jamie and Steve

We closed ITMX and ITMY chambers and started pumping around 11am

What we did before:

1, turned off AC power  to PZT Jena HV ps

2, checked jam nut positions

3, cheched  single o-ring shims

4, closed psl out shutter

  5358   Wed Sep 7 13:28:25 2011 steveSummaryCamerasAll Camera setups a need upgrading

Quote:

I just tried to adjust the ETMY camera and its not very user friendly = NEEDS FIXING.

* Camera view is upside down.

* Camera lens is contacting the lexan viewport cover; this means the focus cannot be adjusted without misaligning the camera.

* There's no strain relief of the camera cables at the can. Needs a rubber cable grommet too.

* There's a BNC "T" in the cable line.

Probably similar issues with some of the other setups; they've had aluminum foil covers for too long. We'll have a camera committee meeting tomorrow to see how to proceed.

 ITMY has been upgraded  here I have the new lenses on hand to do the others when it fit into the schedule.

  5361   Wed Sep 7 18:19:37 2011 steveHowToVACstop pump down for overnight

Quote:

Jamie and Steve

We closed ITMX and ITMY chambers and started pumping around 11am

What we did before:

1, turned off AC power  to PZT Jena HV ps

2, checked jam nut positions

3, cheched  single o-ring shims

4, closed psl out shutter

 We are at 30 Torr of 7 hours of pumping with 2 roughing pumps.

Kiwamu will take over the rest of the roughing today. He will keep an eye on  the pumping speed to be  ~1-2 Torr/min  and open up the manual RV1 valve if needed.

The present status is #3023 of  "chamber open to vacuum open" mode and waiting the P1 pressure to drop to 500 mTorr

He will do the following to stop pumping at P1 = 500 mTorr

1, close V3

2, close RV1 with torque wheel

3, turn off PR1 & 3

4, disconnect metal hose between RV1 and PR3

 I will start the Maglev tomorrow morning.

  5365   Thu Sep 8 10:50:44 2011 steveUpdateVACpumpdown #71 comleted

Vacuum status:  " vacuum normal"   CC1 pressure 5e-5 Torr

Slow roughing through butterfly valve took 11 hours at 1-2 Torr/min speed.  We had a leak at the metal hose connecting o-ring  that became visible  at 200 Torr.

The vacuum envelope pressure rose to 500 mTorr from 450 mTorr  This is 50 mTorr leak plus outgassing over 11 hrs  over night stop =  5  mTorr /  hr

Atm2, Maglev pumpdown details. P2 and P3  are in the foreline of the Maglev. The pressure peaks at 4 Torr beacause the 3 drypumps have  little pumpimg speed at this range.

            External fan is turned on during this one hour period to prevent  Maglev turbo from overheating.

            Same things are  happenning with the two small TP2 and TP3 pumps under load. Their foreline pressure peak at 1 Torr.  They slow down to 45 K RPM from 50K RPM  and warm up to 36-39 C

Precondition: 36 days at atm

Attachment 1: pd#71.jpg
pd#71.jpg
Attachment 2: maglevpd.jpg
maglevpd.jpg
  5366   Thu Sep 8 13:20:07 2011 steveUpdatePEMvac envelope at atm for 36 days

We tried not to open chambers above 10,000 particles of 0.5 micron cf/min

New items going in:                       2 rasor beam traps, 5 badly oxidized old silver plated  setscrew with spring loaded tips......to be replaced in the future, viton tips for eq screws....some are lose, gold plated allen wrench installed at ITMX bottom, reglued magnet on ITMX

Bad hardware things found:          nylon ball "locking elements" on OSEM locking set screws with screwdriver  slot, lose  1064 nm filter on OSEM pd

Attachment 1: vent70.jpg
vent70.jpg
  5395   Tue Sep 13 16:57:44 2011 steveUpdateLSCITMX oplev **

Quote:

I lined up the Y Arm for locking and then centered the oplevs for ETMY and ITMY.

* The ITMY OL has still got the old style laser. Steve, pleaes swap this one for a HeNe. Also the optical layout seems strange: there are two copies of the laser beam going into the chamber (??). Also, the QPD transimpedance needs to be increase by a factor of ~10. We're only getting ~500 counts per quadrant. Its worth it for someone to re-examine the whole ITMY OL beam layout.

* The ETMY OL beam was coming out but clipping on the mount for the ETMY OL HeNe. This indicates a failure on our part to do the ETMY closeout alignment properly. In fact, I get the feeling from looking around that we overlooked aligning the OL and IPPOS/ANG beams this time. If we're unlucky this could cause us to vent again. I undid part of the laser mount and changed the height on the receiving mirror to get the beam back onto the QPD.

I noticed that there is significant green light now getting into some of the IR PDs; beacuse of this there are weird offsets in the TRY QPD and perhaps elsewhere. We had better purchase some filters to tape over the front of the sensitive IR sensors to prevent the couplling from the green laser.

* There is a beam on IPPOS, but its too big for the detector (this has always been the case). We need to put a 2" lens with a weak focusing power on this path so as to halve the beam size on the detector. Right now its clipping and misleading. There is also a 0.9V offset on the SUM signal. I'm not sure if this readout is working at all.

* I couldn't find any beam on IPANG at all. Not sure what's changed since Kiwamu saw it.

 Old Coherent diode laser was replaced by Uniphase HE/NE 1125P at ITMX.

Newport 10B20NC.1 broadband beam sampler set up as beamspitter to dump 90% of the light into beam trap. Beam in to test mass  0.7 mW ,  returning to qpd 0.07 mW  = ~ 3,700 counts

f 1.5 m lens placed into ingoing beam path to reduce the spot size on the qpd.         ITMY oplev will be done in this manner tomorrow.

 

* IP-ANG is lost with the Piezo Jena PS

* IP-POS cable have to be found at the LSC rack

 

  5403   Wed Sep 14 07:51:20 2011 steveUpdateSUSPRM damping restored

The PRM damping was restored at side sensor var 1050

  5407   Wed Sep 14 15:05:52 2011 steveUpdatePEMair cond maintenance

Jeff has changed our AC filters inside the lab this morning. Now he is checking on the main filters at CES.  He will finish the roof units tomorrow.

Met One #1 counter is on the top of IOO chamber.  It is measuring 1 and 0.5 micron size particles.  One year of lab condition plot below.

 

Attachment 1: ac1y.jpg
ac1y.jpg
  5415   Thu Sep 15 07:28:08 2011 steveUpdateSUSPRM damping restored

Quote:

The PRM damping was restored at side sensor var 1050

 The PRM sus damping restored.

  5434   Fri Sep 16 16:07:28 2011 steveUpdateSAFETYvisitors safety training

Paul, Mirko and Katrin visiting grad students received the 40m basic safety training.

Attachment 1: P1080241.JPG
P1080241.JPG
  5497   Wed Sep 21 11:35:07 2011 steveUpdateVACRGA scan

RGA scan with maglev pumping speed at day 14 of the pump down.

The larger inserted box contains the tuning parameters of the SRS  200 amu RGA

Attachment 1: rgascanpd71m14d.jpg
rgascanpd71m14d.jpg
  5529   Fri Sep 23 16:25:01 2011 steveUpdateVACvac rack UPS battery replaced

APC Smart -UPS 2200   model: SUA2200RM2U   batteries were replaced by compatible RBC43, 8x  12V5A

Attachment 1: P1080252.JPG
P1080252.JPG
Attachment 2: P1080254.JPG
P1080254.JPG
  5542   Mon Sep 26 11:35:44 2011 steveUpdateCamerasarms cameras upgraded

The arm's CCD cameras were reset as picture shows last week.

The height adjustment only works at ITMX. Short post holders are ordered to make this feature  available on the rest.

The 75 ohms video and power supply cables are stress relieved. Solid cover can be attached now without  miss aligning cameras.

Attachment 1: P1080251.JPG
P1080251.JPG
  5562   Wed Sep 28 07:36:41 2011 steveUpdateSUSITMY damping restored

ITMY suspention damping restored

  5563   Wed Sep 28 07:46:42 2011 steveUpdateSUSDsub connections at the back of 1X5 are fixed

 

 I'm turning  the sus damping  off for Dsub connection fix at  the back of 1X5 rack

The plan is to install 4-40 jack screws to lock connector positions.

All dewittening(or called coil driver) and wittening D sub connectors are locked with two 4-40 socket head screws

  5587   Fri Sep 30 17:01:29 2011 steveUpdateSUSETMX oplev intensity effect on noise

Kiwamu and Steve,

This is one of the better oplev set up we have. Single bounce from TM, no mirror on stack. One lens and one  mirror on ISCT. Old Uniphase 1103P laser on heafty 3" od mounts.

Somewhat  big ~5-6 mm spot on qpd in  1,300 counts.

The intensity noise effect can be seen at 1 Hz and 3-20 Hz

Oplev servo was OFF

Attachment 1: ETMXoplintens.jpg
ETMXoplintens.jpg
Attachment 2: P1080267.JPG
P1080267.JPG
  5599   Mon Oct 3 08:38:21 2011 steveSummaryVACRecovery from the power shutdown is completed

 

I failed to start Rana's favorit anciant desktop computer at the vac rack. He has to baby this old beast just a little bit more.

Vacuum status: Vac Normal was reached through Farfalla: Rga was switched back to IFO and and Annuloses are beeing pumped now.

V1 was closed for about a day and the pressure reached  ~2.8 mTorr in the IFO.  This leakrate plus outgassing is normal

The ref cavity 5000V was turned on.

The only thing that has to be done is to restart the RGA. I forgat to turn it off on Friday.

 

Attachment 1: poweroutage.jpg
poweroutage.jpg
  5610   Tue Oct 4 07:51:36 2011 steveUpdateCDSc1lsc and c1sus are still down

 

 c1lsc and c1sus are still down. Only ETMX and ETMY are damped

  5620   Wed Oct 5 11:33:25 2011 steveUpdateSUSPRM and BS oplev laser replaced

 

JDSU 1103P died after 4 years of service. It was replaced with new identical head of 2.9 mW output. The power supply was also changed.

The return spots of 0.04 mW  2.5 mm diameter on qpds are BS  3,700 counts and PRM 4,250 counts.

 

  5622   Wed Oct 5 17:08:49 2011 steveUpdateSUSBS oplev spectra

Kiwamu and Steve,

The He/Ne oplev shows no coherece so relative intensity noise is not limiting factor for the oplev servo

Attachment 1: BSoplservON2.png
BSoplservON2.png
  5630   Fri Oct 7 14:04:48 2011 steveUpdateSUSHe/Ne intensity noise effect on oplevs

The SRM bounce peak 18.33 Hz. Suresh helped me to retune filter through Foton, but we failed to remove it.

ITMX_OPLEV_PERROR shows high coherence with oplev laser. This is our lousiest set up. I will work on it next week.

Generally speaking we can say that JDSU-Uniphase 1103P and 1125P laser intensity noise do not limit oplev servo performance.

However, the overall well being of filters, gain settings, beam sizes on qpds are poor.

 

Attachment 1: PRMoplevINTn.png
PRMoplevINTn.png
Attachment 2: BSoplevINTn.png
BSoplevINTn.png
Attachment 3: ITMXoplevINTn.png
ITMXoplevINTn.png
Attachment 4: ITMYoplevINTn.png
ITMYoplevINTn.png
Attachment 5: SRM_oplevINTn.png
SRM_oplevINTn.png
Attachment 6: ETMYoplevINTn3.png
ETMYoplevINTn3.png
Attachment 7: ETMXoplevINTn.png
ETMXoplevINTn.png
  5645   Mon Oct 10 16:32:18 2011 steveUpdateSUSUL sensor of ETMY is recovered

 I lost UL osem voltage this morning when I was checking the actual connection at rack ETMY

This after noon I disconnected  the 64 pins IDE connector from satelite amp at the rack, and the two 25 pins Dsubs at this juction board.

UL OSEM recovered after reconnecting these three connectors.

Atm3, bad connection.........noisy UL

 

Attachment 1: ETMY_UL.png
ETMY_UL.png
Attachment 2: ETMY_OSEM_UL.png
ETMY_OSEM_UL.png
Attachment 3: noisyETMY_UL.png
noisyETMY_UL.png
  5655   Wed Oct 12 08:43:30 2011 steveUpdateSUSITMX oplev improved a bit

 Atm2 is before optical path adjustment. The idea was to remove possible clipping in vacuum.

Coherense significantly reduced below 4 Hz

Today I will replace the He/Ne laser 1125P with 1103P

 

Attachment 1: ITMXoplev.png
ITMXoplev.png
Attachment 2: ITMXoplevservo_ON.png
ITMXoplevservo_ON.png
  5660   Thu Oct 13 14:23:09 2011 steveUpdateSUSITMX oplev with 3 mm beam on qpd

 I replaced the JDSU-Uniphase 1125P by 1103P He/Ne laser. This new laser had 2.8 mW output yesterday. It degraded to 0.5 mW by this morning.

The beam size on the QPD is ~3 mm  This should give us  better sensitivity. These are not the perfect lenses at all, but we have them here.

On the other hand, there are still some coherence below 1 Hz, so the laser intensity noise or clipping dominating  this  part of the spectrum.

 

Attachment 1: ITMXoplev1103p#2.png
ITMXoplev1103p#2.png
Attachment 2: ITMXoplev.png
ITMXoplev.png
  5675   Mon Oct 17 07:57:24 2011 steveUpdateSUSETMX sus damping restored
  5680   Mon Oct 17 17:07:30 2011 steveUpdateSUSETMX oplev returning beam od 3 mm

 ETMX oplev had 6 mm diameter beam on the qpd.  I relayed the beam path with 2 lenses  to get back  3 mm beam on the qpd

BRC 037  -100 Bi _concave lens and PCX 25  200 VIS do the job. Unfortunately the concave lens has the AR 1064.

 

 

Attachment 1: ETMX-oplev.jpg
ETMX-oplev.jpg
  5692   Wed Oct 19 08:34:16 2011 steveUpdateSUSSRM sus damping restored

Sorry Kiwamu, I realized too late that you were freeswigging. Hopefully 4 hrs was enough.

Attachment 1: SRM.png
SRM.png
  5693   Wed Oct 19 09:44:10 2011 steveUpdateSUSETMX oplev power spectrum

Quote:

 ETMX oplev had 6 mm diameter beam on the qpd.  I relayed the beam path with 2 lenses  to get back  3 mm beam on the qpd

BRC 037  -100 Bi _concave lens and PCX 25  200 VIS do the job. Unfortunately the concave lens has the AR 1064.

 

 

 Coherence at 1 and 2-3 Hz only. He/Ne laser intensity noise is not an issue.

Attachment 1: ETMXoplev2lens.png
ETMXoplev2lens.png
  5701   Wed Oct 19 16:28:35 2011 steveUpdateGreen LockingETMY mechanical shutter is working

Quote:

Uniblitz mechanical shutter installed in the green beam path at ETMY-ISCT  The remote control cable has not been connected.

The ETMY  shutter can be remotely switched from medm screen POY of mechanical shutters.

The new cable from ETMY controller goes to east vertex EV-ISCT where it is connected to POY shutter hook up BNC cable.

  5712   Thu Oct 20 12:43:19 2011 steveUpdateSAFETYrefilled first aid kits & their locations

First aid kits are located close vicinity of entry doors and under circuit breaker panels.

 

Attachment 1: P1080299.JPG
P1080299.JPG
Attachment 2: P1080306.JPG
P1080306.JPG
Attachment 3: P1080304.JPG
P1080304.JPG
Attachment 4: P1080305.JPG
P1080305.JPG
Attachment 5: P1080300.JPG
P1080300.JPG
Attachment 6: P1080301.JPG
P1080301.JPG
Attachment 7: P1080303.JPG
P1080303.JPG
Attachment 8: P1080307.JPG
P1080307.JPG
  5719   Fri Oct 21 09:08:33 2011 steveUpdateSUSMC2 Misalignment

 Thinks to do before the NEXT realignment:

B,  tie 4 ancher bolts on table legs to the floor

C,  tie 4 dog clamps between table and chamber

D,  check the locked position of the 4 x 4 positioning screws

E,  check bellow protecting 4 tubes are not shorting

A,  here is the concrete  slab cut

 

It reminds me to check the  IFO vacuum envelope dog clamps on the chambers to floor  with torque wrench.

 

 

Attachment 1: mc2.jpg
mc2.jpg
  5720   Fri Oct 21 10:32:14 2011 steveUpdatePSLPSL laser turned off

In order to move the emergency shut off switch in room 103 I had to turn off the 2 W Innolight laser. This job will take an hour.

 

  5721   Fri Oct 21 11:02:47 2011 steveUpdatePSLPSL laser turned ON

Quote:

In order to move the emergency shut off switch in room 103 I had to turn off the 2 W Innolight laser. This job will take an hour.

 

 It is back on.

Attachment 1: laserofon.png
laserofon.png
  5728   Mon Oct 24 14:26:01 2011 steveUpdateGeneralno electricity on Nov. 19
Subject: Electricity Interruption- 11/19/11
From: "PP Service Center" <PPService@caltech.edu>
To: "DeLaRosa, Dario" <Dario.DeLaRosa@caltech.edu>,
         ...snip... "Sullivan, Joan O." <sully@caltech.edu>

 

CALIFORNIA INSTITUTE OF TECHNOLOGY

                   FACILITIES MANAGEMENT

              UTILITY & SERVICE INTERRUPTION

 

**PLEASE POST**

 

 

Building:            Central Engineering Services (C.E.S.)

LIGO Gravitational Physics building adjacent to C.E.S.

Safety Storage adjacent to CES

Steele House 

Keck Lab

 

Date:                November 19, 2011

 

Time:                8:00 a.m. To 9:00 a.m.

 

Interruption:        Electricity

 

Contact:             Mike Anchondo ext. 4999  Tom Brennan 4984

 

*This interruption is required for maintenance of high voltage switchgear in Campus Sub Station.

 

 

  5741   Wed Oct 26 10:07:16 2011 steveUpdateGeneralno electricity ....... will be recheduled

Quote:
Subject: Electricity Interruption- 11/19/11
From: "PP Service Center" <PPService@caltech.edu>
To: "DeLaRosa, Dario" <Dario.DeLaRosa@caltech.edu>,
         ...snip... "Sullivan, Joan O." <sully@caltech.edu>

 

CALIFORNIA INSTITUTE OF TECHNOLOGY

                   FACILITIES MANAGEMENT

              UTILITY & SERVICE INTERRUPTION

 

**PLEASE POST**

 

 

Building:            Central Engineering Services (C.E.S.)

LIGO Gravitational Physics building adjacent to C.E.S.

Safety Storage adjacent to CES

Steele House 

Keck Lab

 

Date:                November 19, 2011

 

Time:                8:00 a.m. To 9:00 a.m.

 

Interruption:        Electricity

 

Contact:             Mike Anchondo ext. 4999  Tom Brennan 4984

 

*This interruption is required for maintenance of high voltage switchgear in Campus Sub Station.

 

 

CANCELLED, WILL BE RESCHEDULED*

  5759   Fri Oct 28 18:33:59 2011 steveUpdateVACleaking nitrogen line fixed

I was lucky to notice that the nitrogen supply line to the vacuum valves was leaking. Closed ALL valves. Open supply line to atm. Fixed leak. 

This was done fast so the pumps did not have to be shut down. Pressurized supply line and open valves to

"Vac Normal" condition in the right sequence.

Attachment 1: allvalvesclosed.png
allvalvesclosed.png
  5767   Mon Oct 31 08:55:19 2011 steveUpdateVACpressure plot at day 53

Quote:

I was lucky to notice that the nitrogen supply line to the vacuum valves was leaking. Closed ALL valves. Open supply line to atm. Fixed leak. 

This was done fast so the pumps did not have to be shut down. Pressurized supply line and open valves to

"Vac Normal" condition in the right sequence.

 

Attachment 1: pd71-m-d53.png
pd71-m-d53.png
  5768   Mon Oct 31 09:42:12 2011 steveUpdateIOOPMC locked

The PMC HV drops off more offen lately.

Attachment 1: pmcHV.png
pmcHV.png
  5771   Mon Oct 31 15:58:25 2011 steveUpdateSUSthinking of black glass baffles for 40m

Shade 12 black glass-green lines: 1/8" thick,  6" wide  x 7 " high  mounted on angle bracket below.  Aperture 1" diameter. Let me know what do you think.

 

Attachment 1: 03260901.PDF
03260901.PDF
Attachment 2: 03260902.PDF
03260902.PDF
  5782   Wed Nov 2 10:04:05 2011 steveUpdateSUSMC2 chamber anchoring tightened

Quote:

 Thinks to do before the NEXT realignment:

B,  tie 4 ancher bolts on table legs to the floor

C,  tie 4 dog clamps between table and chamber

D,  check the locked position of the 4 x 4 positioning screws

E,  check bellow protecting 4 tubes are not shorting

A,  here is the concrete  slab cut

 

It reminds me to check the  IFO vacuum envelope dog clamps on the chambers to floor  with torque wrench.

 

 

 I locked the PMC and MC resonated in TM00 right on. Than I started checking anchoring screws with the torque wrench.

B,  3/8 foor bolts were tight, They were set  to 50 ft/lbs

C,  dog clamp bolts were tight at 80 ft/lbs

D,  horizontal position locks were lose. They were locked by finger.

E,  below covers were reset not to short

The MC is locking in TM01 mode now 

  5783   Wed Nov 2 10:41:47 2011 steveUpdateGeneral2 spare heliax at the LSC rack

They were traced and labeled. One goes to 1X2 and the other to AS-ISCT. They are Andrew Heliax 1/4" od. made by CommScone,  model number FSJ1-50A

  5826   Mon Nov 7 08:08:24 2011 steveUpdateIOOPMC locked

The PMC acted like it was sleeping. The HV slider was dead. The MC locked instantly as the PMC had transmission.

Attachment 1: pmcHV.png
pmcHV.png
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