TB 9-6625-2309-24
NOTE
Speed-up devices shown in figure 3-18, of the FOCUS
Operation Manual, are optional.
For purpose of this
calibration procedure, speed-up devices are not required.
i. Set digital delay/pulse generator controls to settings as indicated in (1) through (12) below:
NOTE
Digital delay/pulse generator softkeys have more than one
function depending on mode of operation.
(1) Press MENU TRIG pushbutton to cycle through steps (2) through (5) below.
(2) TRIG to EXT.
(3) THRESHOLDS to +0.50V.
(4) SLOPE (+/-) to +.
(5) TRIGGER TERM to 50 OHM.
(6) Press MENU OUTPUT to cycle through steps (7) through (11) below.
(7) OUTPUT to AB.
(8) AB & -AB LOADS to 50 OHM.
(9) AB: VAR.
(10) AB: AMPLITUDE to +2.00V.
(11) AB: OFFSET to -1.60V.
(12) Press MENU DELAY pushbutton to set B Delay to B=A + 0.000010000000 (10 sec).
NOTE
Make copies as required of data sheets included at appendix A
for recording data and software computations.
j. Record displayed index (from TI) on TD-260C Data Sheet (appendix A) at Customer
Existing Index of Refraction line.
k. Press PULSE WIDTH pushbutton to select SHORT.
l. While pressing N/LASER pushbutton, adjust CURSOR A control to set INDEX: to
1.4990 on TI display.
NOTE
If FOCUS-SWCM optical subassembly (PIN 202-60015-01),
FOCUS-LWCM optical subassembly (PIN 202-60015-02), or
DG535, digital delay/pulse generator have been replaced or
repaired, TID may have changed. Steps in paragraph 12,
SECTION IV, must be performed for verification.
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