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cso:instruments:heterodyne:tuning:zrex [2012-01-10 16:36] sradford created |
cso:instruments:heterodyne:tuning:zrex [2012-11-21 21:36] (current) sradford |
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| + | ====== Zrex tuning ====== | ||
| + | |||
| + | **// Zrex has been decommissioned. //** These notes are only of historical interest, at best. | ||
| + | |||
| + | Instruction | ||
| + | for using 4GHz AOS and wideband receivers can be found | ||
| + | [[http://www.cso.caltech.edu/docs/hiro/wideband/wideband.html|here]]. Instructions | ||
| + | to set up the 230GHz wideband receiver is found | ||
| + | [[http://ulu.submm.caltech.edu/cham/CSOmemos/FranksRx_directions_LOhookup.htm|here]] | ||
| + | summarized by Richard. | ||
| + | Instruction to setup the sidecab PLL for the 345 GHz wideband receiver (Barney) | ||
| + | can be found [[http://ulu.submm.caltech.edu/cham/CSOmemos/Barney_instructions_sidecabPLL.htm|here]]. | ||
| + | When using the SMA PLL for the 345 GHz wideband receiver, | ||
| + | please use the instruction [[http://ulu.submm.caltech.edu/cham/CSOmemos/Barney_instructions_SMA_PLL.htm|here]]. | ||
| + | |||
| + | |||
| + | If it's heterodyne receivers, you need to tune the receiver manually. | ||
| + | Tuning instructions are found at | ||
| + | [[http://www.submm.caltech.edu/cso/receivers/instructions.html|Tuning instruction page]] under | ||
| + | [[http://www.submm.caltech.edu/cso/receivers/|heterodyne instrumentation homepage]]. | ||
| + | Overall instructions are found at | ||
| + | [[http://www.submm.caltech.edu/cso/receivers/tuning.html|Receiver Tuning Cookbook page]]. Before starting the tuning process, | ||
| + | don't forget placing hot load in front of your receiver. Also, always wear | ||
| + | anti-static wrist strap with grounding wire when you touch receiver components. | ||
| + | Note that the 1mm wide-band receiver and the 850 GHz receiver systems are different | ||
| + | from side cab receivers. Contact experts (1mm wide band rx: Richard Chamberlin, | ||
| + | Hiroshige Yoshida, Chip Sumner, Frank Rice/ 850GHz rx: Richard Chamberlin, | ||
| + | Hiroshige Yoshida, Jacob Kooi) for details. | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | If you get a message SYNTH FAIL(06) on the antenna status monitor, | ||
| + | powercycle the HP synthesizer (turn off and turn on) located just above the | ||
| + | oscilloscope that allows us to check the Gunn lock status. You turn off, | ||
| + | wait for 10 sec or so, and turn on the power of the HP synthesizer, and go back | ||
| + | to UIP, reload the line (UIP> lo yourline/force) and see if the error message | ||
| + | disappears or not. If this doesn't work, wait for 5 min. If 5min doesn't work | ||
| + | either, wait for 20 min to let the synthesizer cool down completely. After | ||
| + | 20 min, turn the power on and load some other line which is lower than your | ||
| + | line frequency first, then load your line frequency next. | ||
| + | |||
| + | After you've done the tuning with the sidecab receivers, fold the ladders you used | ||
| + | and lean it against the wall. | ||
| + | |||
| + | - Before tuning the receiver on | ||
| + | - check the attenuator: fully attenuated | ||
| + | - Multiplier bias: normal, set with a value of 4V | ||
| + | - Magnet: off | ||
| + | |||
| + | - Turn on one of sidecab receivers | ||
| + | - UIP> za 44 (to allow the mirror to change the position for your receiver) | ||
| + | - UIP> lo yourline /force /lock=default /if=1.5 (For side cab receivers, | ||
| + | to set the line at the middle of the AOS) | ||
| + | - check the tertiary mirror position. | ||
| + | |||
| + | - Don't go beyond Vop of greater than 10.5 V. If you go beyond that, you'll be in the over voltage protection mode. | ||
| + | To get out of the mode, do following. The steps below will be done in the phase lock control panel in the sidecab. | ||
| + | |||
| + | i. Switch to "local" mode from "remote" mode. | ||
| + | ii. Turn the Gunn off. | ||
| + | iii. Turn Vop down for 2-3 turns. At the same time, watch the Vop reading on the reader above the HP synthesizer. | ||
| + | iv. Turn the Gunn on. | ||
| + | v. Switch to "remote" mode from "local" mode. | ||
| + | |||
| + | And follow tuning instruction for tuning. | ||
| + | |||
| + | - Turn on Barney on a cass focus | ||
| + | - UIP> inst RX345x | ||
| + | - UIP> za 35 (to make it easy to see each component for tuning on the cass focus) | ||
| + | - UIP> lo yourline /force /lock sma_pll /if 5.5 /receiver RX345X | ||
| + | - UIP> POINTING BARNEY_CASS (load the pointing file for Barney) | ||
| + | - UIP> spec /lock (force the antenna computer to accept the phase lock loop is locked) | ||
| + | - UIP> spec xx /ffts1 5.5 /ffts2 /restart (/display puuoo:0) (xx: integration time, you can use ffts2 when using Barney and ZRex) | ||
| + | - kilauea> /opt/uip/bin/disable_operator_terminal (disable "pll unlocked" warning message on the UIP terminal) | ||
| + | |||
| + | A useful instruction on how to use Barney with sidecab PLL is available on the web | ||
| + | (last updated on 2011/01/25) | ||
| + | |||
| + | - Turn on Franks receiver on a cass focus | ||
| + | - UIP> instrument RX230X | ||
| + | - UIP> za 35 (to make it easy to see each component for tuning on the cass focus) | ||
| + | - UIP> lo yourline /force /lock sma_pll /receiver RX230X | ||
| + | - UIP> POINTING Z_REX | ||
| + | - UIP> spec /lock (force the antenna computer to accept the phase lock loop is locked) | ||
| + | - kilauea> /opt/uip/bin/disable_operator_terminal (disable "pll unlocked" warning message on the UIP terminal) | ||
| + | A useful instruction on how to use Franks receiver is | ||
| + | [[http://ulu.submm.caltech.edu/cham/CSOmemos/Barney_instructions_sidecabPLL.htm|available on the web]] | ||
| + | (last updated on 2010/05/06) | ||
| + | |||
| + | - After tuning | ||
| + | After you've done the tuning with the sidecab receivers, fold the ladders you used and | ||
| + | lean it against the wall. | ||
