TB 9-4931-504-50
(7) Turn DELAY TIME MULT (2nd dot) dial to 1.00. Peak of time mark will
remain within 0.1 division of second graticule line.
(8) Repeat technique of (7) above for DELAY TIME MULT (2nd dot) setting of
2.00 through 9.00 in consecutive order for same results as in (6) above.
(9) Set DELAY TIME MULT (2nd dot) to 0.00 and press SWP pushbutton.
(10) Set dot on first time marker with DELAY ZERO (1st dot) control.
NOTE
It may be necessary to reduce intensity on oscilloscope for
suitable viewing of dots.
(11) Set DELAY TIME MULT control to 1.00 and observe that first intensified dot
is within 0.l division of second time marker. Repeat this technique for DELAY TIME
MULT settings of 2.00 through 9.00. Intensified dot will be within 0.1 division of each
marker.
(12) Reset dot on first time marker with DELAY TIME MULT control.
b. Adjustments. No adjustments can be made.
17. 10 nS/DIV Delay
a. Performance Check
(1) Set CH1 VOLTS/DIV switch to .5 V and DELAYING SWEEP and DELAYED
SWEEP SEC/DIV switches to 10 nS. Press HF SYNC pushbutton.
(2) Set time-mark generator (A8) to 10 nS markers output.
(3) Adjust TRIGGERING LEVEL control for stable display on oscilloscope (A3).
(4) Adjust HORIZ POS (front panel) control to aline second cycle on second
graticule line. If oscilloscope does not indicate 1 cycle per graticule division over center
8 divisions within 0.2 division, perform b(l) below.
(5) Release SWP pushbutton. If oscilloscope does not display 1 cycle per
graticule division over center 8 divisions within 0.2 division, perform b(2) below.
b. Adjustments
(1) Adjust C350 (fig. 1) until 10th cycle is alined with 10th vertical graticule line
(R).
(2) Adjust DELAY ZERO (1st dot) control to set peak of one cycle on second
vertical graticule line; then adjust C353 (fig. 1) until 10th cycle is alined with 10th
vertical graticule line (R).
18. 1 nS Linearity
a. Performance Check
(1) Connect time-marker generator (A8) HF OUTPUT to CH1 INPUT, using cable
(B4).
(2) Set time-mark generator to 2 nS output.
