90 pulse width calibration

90 pulse width calibration

• Place the sample in the magnet, initiate a new file in edc, and load the 1H parameter file (par).

• Perform lock, shim, rga, and atmm for tuning and matching.

• In eda or the command line, modify parameters:

  • Change pulprog = zg30 to pulprog = zg.

  • Set p1 = 2 u, ns = 1, ds = 0.

  • Execute zg, ft, apk (note: apk is used for reference phase).

  • Alternatively, enter the phase mode to manually adjust the phase, ensuring it is set positively as a reference phase.

Note: Reference phase adjustment should not use the pk command.

Note:  Throughout the entire process, refrain from using rga arbitrarily; rg needs to 

          remain consistent. 

       Adjust the parameters for B662 or A525:

    For B662: Set p1 = 29-30 u.

    For A525: Set p1 = 31-32 u (estimated value for 180 degrees).

    Execute zg, ft, pk, and observe the positive and negative phase changes of the   

    peak.

If the positive phase is higher:

Increase the value of p1 u until the positive phase height is approximately equal to the negative phase.

Divide the obtained value by 2 to get the 90 pulse width.

Adjustments during the search for the 180 pulse width should use the pk command.

If the negative phase is higher:

Decrease the value of p1 u until the positive phase height is approximately equal to the negative phase.

Divide the obtained value by 2 to get the 90 pulse width.

      Notes:Adjustments during the search for the 180 pulse width should use the pk 

                 command.

   Notes:The phase adjustment for each pulse width change should be in the range 

               of 0.2 u to 1 u.

The pulse width values for each par file can be found in eda.

B662: getprosol 1H (14.5) - 9.40 (replace the brackets with the correct 90 pulse width, without brackets).

A525: getprosol 1H (15.5) - 9.96 (replace the brackets with the correct 90 pulse width, without brackets).

90 pulse width calibration

樣品置入磁體中，edc 建立新檔案，讀進 1H 的參數檔(par)，

作好鎖場、勻場、 rga 、 atmm 作 tuning 及 matching,

在 eda 或指令列中修改參數，將 pulprog = zg30 改為 pulprog = zg,

p1 = 2 u, ns = 1, ds = 0,  zg,  ft,  apk,  (注意: 是 apk ~ 參考相位用)

又或者進入 phase mode 以手動方式調整相位，

此時相位應將其調為正向，當作參考相位。

  注意 : 參考相位不能用 pk 指令去調整，

  注意 : 以下整個過程中不能再任意使用 rga, rg 需要始終一致

設定 (B662) p1 = 29~30 u, 或 (A525) p1 = 31~32 u (180 度之預估值)

zg, ft, pk 後觀察峰的相位正負的消長；

若正相位比較高

則再增加 p1 的 u 數，

至到 zg, ft, pk 後正相位的高度近似於負相位的高度，

所得之值除以 2 即為 90 脈寬。

注意 : 尋找 180 脈寬過程中的相位調整一律用 pk

(惟參考相位 p1 = 2 u 除外，參考相位使用 apk)

若負相位比較多

則再減少 p1 的 u 數，

至到正相位的高度近似於負相位的高度。

所得之值除以 2 即為 90 脈寬。

注意 : 尋找 180 脈寬過程 的相位調整一律用 pk。

(參考相位(p1 = 2 u)除外)

注意 : 每次脈寬的增減值以 0.2 u ~ 1 u 為宜。

(在 eda 中可找到每個 par 中 p1 相關 pulse width 值)

B662: getprosol 1H (14.5) - 9.40 (括號內應填入正確 90 脈寬，括號去除)

A525: getprosol 1H (15.5) - 9.96 (括號內應填入正確 90 脈寬，括號去除)