Gain curves.

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Gain curves by receiver:

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327 receiver  (top)

• Data taken mar03 to feb05. Gain curve installed 28feb05. Valid from beginning (jul02).

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430 dome.  (top)

• Data taken mar03 to sep03. Installed 26sep03. Valid from beginning (since same cal).

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430 carriage house.  (top)

• Data taken mar05. Installed 17mar05. Valid from beginnin (since first model).

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Lband wide. (top)

• Data taken Mar03 thru sep03  Installed 02nov03. Valid from 01mar03.

This is after the new horn was installed.
• Data taken nov02 thru dec02. Installed dec02??. Valid 22nov02 thru 17feb03.

This was from the horn focus move till the new receiver was installed.
• Data taken sep01 thru 20nov02 Installed dec02 ??. Valid 01sep01 thru 21nov02.

This is from the start of the calibration runs till the horn was moved to correct for the phase error.

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Lband narrow  (no longer installed).  (top)

• Data taken 27aug02 thru sep02: This gain curve was made after the lbn horn focus was moved on 27aug02. It was measured at 1300, 1375, 1415, and 1500 Mhz. It is a function of za only.

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Sband narrow.  (top)

• Data taken 01mar03 thru feb04. Installed 9mar04. Valid from 01mar03 to current date.
• Data taken Sep01 thru nov01. Installed 30dec01. Valid from 01sep01.

The sband narrow gain curve was made at 2380 Mhz. It is a function of za.

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Sband wide/low.  (top)

• Data taken 15may04 thru 01sep04. Installed 10sep04. Valid from 15may04 to current date.

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Sband high (3-4 ghz).  (top)

• Data taken 13feb04 thru jun04. installed 03jul04. Valid from 13feb05 to current date. The new cals were installed and the horn was lowered .8 inches to put it in focus.
• Data taken 15may03 thru sep03. Installed 10mar04. Valid from 01mar03 to 12feb04The cal values were drifting during this time period.

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Cband (4-6 ghz).  (top)

• Data taken 25may05 thru 31oct05.   Installed 22nov05. Valid from 25may05. New amps were installed in the dewar on 25may05. The curves were measured at 9 frequencies.
• Data taken may03 thru Feb04. Installed 08mar04. Valid from 05may03.

This is after the new cals were installed and the cal cable was tightened until the end of feb04. The curves were measured at 6 freq: 4500,4860, 5000, 5400, 5660, 5900 Mhz.
• Data taken Aug02 thru Dec02 fit . Installed dec02 ??. Valid 28aug02 to 04may03.

The cband gain curve was taken from data 28aug02 thru 30nov02. This is after the horn focus was changed on 27aug01. The curve is a function of az and za. It was measured at 4500, 4860, 5000, and 5400 Mhz.
• Data taken 01sep01 thru 27aug02. Installed sep02 ??. Valid 01sep01 thru 27aug02.

This data was from the start of the calibration scans until the horn focus was changed.

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Cband hi (6-8 ghz).  (top)

• Data taken feb04.  Valid 14feb04 onward.

The receiver was installed in feb 04. Data was taken at 4 freq: 6600,6900,7200,7400 Mhz.

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Xband (8-10 ghz).  (top)

• Data taken 05oct03 thru 25jan04.  Installed 25jan04. Valid 05oct03 onward.

The new horn was installed on 05sep03. The receiver was then taken to the ant test range where Trcv and Tcals were measured. It was re-installed on the telescope in oct03. It was moved to a new position on the rotary floor on 08jan04. Data was taken at 8500,8800,9000, and 9200 Mhz.
• Data taken mar03 thru sep03.  Installed 27mar04. Valid mar03 thru sep03 onward.

The elevation rail shimming and dome realignment finished in mar03. Calibration data from mar03 thru sep03 was used to compute gain curves. After sep03 the new horn was installed on the receiver. Data was taken at 8500,8800,9000, and 9200 Mhz.

The plots were made using the idl routine gainget(az,za,freq,rcvNum,gainval).

processing: x101/calmrcvr/gaincurves.pro

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