GSP-830 User Manual 54 3b. Modify correction point 1. Move the cursor using the Arrow keys. 2. Enter the new frequency or gain using the Numerical keys and Unit keys or dB key. Pt. Freq. (MHz) Gain1234523002.524002500260022001.32.81.81.2 BK SPdBEnterGHz /SecmSecMHz /kHz / Secμ 3c. Delete correction point 1. Move the cursor to the target using the Arrow keys. 2. Press F2 (Delete). The frequency and gain are deleted together. DeleteF 2 3. To undo the last deletion, press F4 (Undelete). UndeleteF 4 Example: point 3 deleted Pt.Freq. (MHz)Gain1234523002.524002500260022001.32.81.81.2Pt.Freq. (MHz)Gain1234523002.52500260022001.31.81.2 4. Save correction set 1. Press F5 (Save Now). The edited data is saved internally. Save NowF 5 2. Press F6 (Return) to go back to the previous menu. ReturnF 6 5. Activate correction 1. Press F2 (Correction On) to turn on the correction. CorrectionOn OffF 2 2. The amplitude icon appears at the bottom of the display. After correction Frequency response becomes linear (original), and the gain is compensated by +2 to +3dB.