TB 9-6625-2024-35
(4) Readjust R447 as necessary for best compromise within 0.5 minor division in
a(6) and (9) above (R).
10. Vertical High Frequency Compensation and Risetime
a. Performance Check
(1) Set calibration adapter TEST switch to VERT OR HORIZ + STEP RESP
and REP RATE switch to 1 MHz.
(2) Adjust calibration adapter AMPLITUDE and POSITION controls for a 6-
division display centered vertically on crt.
(3) Release dual time base MAG pushbutton to X10 (OUT).
(4) Adjust dual time base TIME/DIV or DLY TIME switches for .05 s and
LEVEL control for a stable display triggered on rising portion of pulse. If displayed
pulse does not have a square leading corner and a flat top with aberrations within 0.5
minor division, perform b below.
(5) Measure risetime using standard risetime technique. Risetime will be 3.5 ns
or less.
(6) Remove calibration adapter from right vertical compartment and install in
left vertical compartment.
10
