改變測試範圍 - Changing Detection range

Changing the Test Range:

If the test range exceeds the standard range (17 ppm to -5 ppm) and a larger detection range is needed (e.g., 200 ppm), o1p and sw (ppm) can be adjusted to achieve the goal.

Experimental Procedure:

1. (Lift, lock, shim)

2. Use rpar bbfo_h1 all.

3. Determine the bandwidth of the test range, sw (ppm) = Chemical shift at the far left (downfield) f1p - Chemical shift at the far right (upfield) f2p.

4. Set o1p = (f1p + f2p) / 2, where o1p is the center position of the test range.

5. getprosol

6. Run receiver gain adjust (rga).

7. Set ns to 1; acquire zg (get a spectrum).

8. Check the range with fp.

9. Set ns to 80.

10. Acquire zg again.

Note 1: o1 = o1p is the observed frequency of channel 1, which represents the center position of the test range.

Note 2: sw = sweep width (ppm/Hz), which represents the full spectral width.

改變測試範圍

測試範圍若超過制式之範圍(17ppm to -5ppm)，

需要更大之偵測範圍時(例如 200ppm)，

可改變o1p 及sw (ppm)以達成目的。

實驗步驟:

1)  (lift, lock, shim)

2)  rpar  bbfo_h1  all

3)  預定測試範圍頻寬 sw (ppm) = 最左邊(downfield)之化學位移 f1p  - 最右邊(upfield)之化學位移 f2p  

4)  o1p  =  (f1p + f2p )/2 ，   o1p為測試範圍之中心位置

5)  getprosol

6)  rga

7)  ns 1 ; zg

8) fp  (檢查一下範圍是否正確)

9)  ns  80  

10)  zg

註1: o1= o1p為測試範圍之中心位置 observed frequency of channel 1

註2 : sw= 全譜寬 sweep width(ppm/Hz)