OTM-3000-CV
FREQUENCY AGILE - F.C.C. COMPATIBLE
TELEVISION MODULATOR
INSTRUCTION MANUAL
Phone:
E-Mail: salessupport@olsontech.com
025-000041 REV C 8/23/01
(209) 586-1022
(800) 545-1022
Fax:
(209) 586-1026
www.olsontech.com
1) INTRODUCTION
The OTM-3000 CV is a frequency agile F .C.C. compatible television modulator with an output frequency
range of 55.25MHz through 445.25MHz (channel 2 through cable channel YY). All channels are selectable
by front panel DIP switches, including F .C.C. offsets of +12.5KHz and +25KHz.
The OTM-3000 CV offers high output level, typically +60dBmV. This unit has a very high out-of-band carrier
to noise ratio (>80dB) and uses SA W I.F . filtering, which allows virtually an unlimited number of modulators to
be combined without the need for external bandpass filters. The OTM-3000 CV has low power consumption
(12 watts @ 115 V AC) for reliable long term operation.
The OTM-3000 CV will perform with seperate baseband audio and video input or a composite video (CV)
input or an external 4.5MHz input.
The unit is shipped for operation in the CV modes. An internal toggle switch controls separate baseband video
and audio inputs and composite (CV) operation. The toggle switch is located on the center divider internal to
the chassis.
OTM-3000 CV
FREQUENCY AGILE - F .C.C. COMP ATIBLE
TELEVISION MODULA TOR
1) For CV operation, the switch should be in the position toward the front of the chassis.
2) For standard operation, the switch should be toward the rear of the chassis.
For composite video application, connect the composite video source to the “composite video input” jack.
Cable the “video only” output to the “video” input. The unit will automatically construct the 4.5MHz carrier if
the 4.5MHz carrier is present with the video. Adjust the video modulation level with the front panel video
modulation control. The audio modulation control is inoperable in the CV mode.
For external 4.5MHz operation, connect the 4.5MHz source to the “composite video input”. T erminate the
“video only” output. Connect the baseband video source to the “video input”.
2) CHANNEL/F .C.C. OFFSET SELECTION
Channel selection is made by properly setting the two 8-position switches to the corresponding channel
code. Select the desired channel/offset code from Figure #1 or the code card attached to the “Channel
Select” cover plate, then set the DIP switches from left to right. The 13 left-most switches are channel
select.
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