Olson Technology OTM-3000-HR - Manual (Page 5)

025-000258 REV B Page 5
5) VIDEO MODULATION ADJUSTMENT
A) Connect a video source of approximately 1V p-p to the video input connector (75 ohms input Z) on
the rear panel.
B) Rotate the video modulation control slowly clockwise until the video overmodulation light turns on.
The light may blink with differences in average picture level. CAUTION: If the modulation is set too
high, compression or lack of contrast will occur during high intensity scenes.
6) RF CARRIER LEVEL ADJUSTMENT
Using a field strength meter, set the video carrier to the desired level with the RF output level adjust pot.
7) MISCELLANEOUS
A) This unit is equipped with a video I.F. loop. The loop is connected with a type F short jumper. If this
becomes disconnected or misplaced, then the OTM-3000 HR will not perform properly.
B) If a scrambling unit is utilized with the OTM-3000 HR, follow the instructions associated with the
scrambler. The video I.F. output level is +40dBmV.
C) This unit is equipped with a 0.5A slo-blo fuse. To maintain proper performance of the unit, please
replace only with an equivalent fuse.
D) A -26dB test point (type F connector) is provided in the rear panel.