Olson Technology OTM-4000 (PAL I) - Manual (Page 4)

025-000336 REV A Page 4
OTM-4000 I
FREQUENCY AGILE 750MHz
PAL I TELEVISION MODULATOR
1) INTRODUCTION
The Olson Technology OTM-4000 I is a frequency agile television modulator. This microprocessor-
controlled unit is capable of operation on any frequency from 48MHz to 750MHz and output frequency
selection is possible in 0.0125MHz increments.
The OTM-4000 I is one of several available versions of the OTM-4000 series of modulators. This PAL I
version of the OTM-4000 should not be tuned by “CHANNEL”. Instead, use the tune by FREQUENCY
method to set it’s output carrier frequency and ignore any reference to channel numbers in the display.
An RF output level of +60dBmV is possible over the operating frequency range of the OTM-4000 I.
SAW filtering and Olson Technology system design factors insure an out-of-band carrier-to-noise ratio greater
than 80dB. This allows unlimited numbers of these units to be combined.
The OTM-4000 I has many advanced features including a menu/button control system, front panel display
of unit ID text, a manual or loss-of-video controlled auxiliary I.F. input with AGC, selectable video AGC,
external audio subcarrier input, configurable audio input, dual I.F. loops, optional remote control, and more.
2) LOCAL CONTROL OF THE OTM-4000 I
A.) FRONT PANEL ADJUSTMENTS:
Video and audio modulation levels, video-to-audio carrier ratio, and the RF output level are adjustable
by means of slotted controls accessible through the front panel. There is also a control for the LCD
panel contrast which should be adjusted for proper viewing once the unit is installed.
See section 4 of this manual for more information on these adjustments.