TB 9-6625-2309-24
(57) Repeat technique of paragraph 7 b through 7 l, and paragraphs 8 and 9 above
for TD-285C optical module at 1310 nm.
NOTE
TD-285C optical module label reads 1300/1550 nm.
Actual
1300 nm wavelength is 1310 nm.
(58) Set FOCUS-LWCM WAVELENGTH switch to 1550 nm.
(59) Set TI wavelength to 1550 nm as required by pressing softkey next to : on TI display.
(60) Set lightwave multimeter to measure optical power in dBm at 1550 nm.
(61) Repeat technique of paragraph 7 b through 7 l, and paragraphs 8 and 9 above
for TD-285C optical module at 1550 nm.
(62) Repeat technique of 7 l above and set Index of Refraction to Customer Existing
value recorded on data sheet.
b. Adjustments. Perform adjustments in SECTION IV and repeat paragraph 9.
CIRCUIT ALIGNMENT
10. A/D Adjustments
WARNING
HIGH VOLTAGE is used during performance of this
calibration. DEATH ON CONTACT may result if personnel
fail to observe safety precautions. REDUCE OUTPUT(S) to
minimum after each step within the performance check where
applicable.
CAUTION
Use ESD precautionary procedures when touching, removing
or installing circuit card assemblies.
NOTE
A/D adjustments in this paragraph are performed to ensure
mainframe of TI is within nominal parameters.
a. Perform (1) through (5) below:
(1) Set ON-OFF switch to OFF.
(2) Remove TI top cover.
(3) Connect frequency counter probe ground to GROUND STRAP A/D 1A2A8 (fig. 15).