TB 9-6625-2084-35
Figure 1B. Board A5 adjustments - left side view - Tektronix, Types 7623 and 7613/R7613,
S N B 1 4 9 9 9 9 a n d below.
9. High Frequency Compensation
a. Performance Check
(1) Position calibration fixture controls as listed in (a) and (b) below:
(a) TEST switch VERT or HORIZ to + STEP RESP.
(b) REP RATE 100 kHz pushbutton pressed.
(2) Set time base TIME/DIV OR DLY TIME switch to 1 s. (Type 7613/R7613,
5 ns for SN 149999 and below).
(3) Adjust calibration fixture AMPLITUDE and POSITION controls for a
6-division display.
(4) Adjust time base POSITION control to position top front corner of display to
center graticule line. If display does not have square leading corner and aberrations exceed
1 minor division, perform b below.
(5) Repeat technique of (3) and (4) above for calibration fixture REP RATE settings
and time base TIME/DIV OR DLY TIME switch settings and adjustments listed in table 3.
