Olson Technology LCM-500-550 - Manual (Page 2)

025-000181 REV C Page 2
LCM-500-550
FREQUENCY AGILE - F.C.C. COMPATIBLE
TELEVISION MODULATOR
1) INTRODUCTION
The Olson Technology LCM-500-550 is a frequency agile F.C.C.compatible television modulator. This unit
will provide >+55dBmV output on any channel from 55.25MHz to 547.25MHz (VHF channels 2 through 13
and cable channels A through PPP). All channels are selectable by front panel DIP switches and a front panel
adjustment allows setting to F.C.C. offset frequencies.
The LCM-500-550 offers the unique Olson Technology feature of >75dB out-of-band carrier to noise ratio.
Also, this unit uses SAW filtering for adjacent channel operation, and it provides 60dB of spurious free dy-
namic range. These features allow virtually unlimited numbers of LCM-500-550’s to be combined without the
need for external bandpass filters.
The LCM-500-550 has low power consumption (14 watts @ 115 VAC) for reliable long term operation.
2) CHANNEL SELECTION
Remove the small cover plate from the front panel to expose the channel select switches and the F.C.C.
offset adjust control as shown in Figure #1. Note that the RF Level control is accessible through the level
adjustment hole in the cover plate.
FIGURE 1 - CHANNEL SELECT/OFFSET ADJUST
Channel selection is made by properly setting the 12-position DIP switches to the corresponding channel
code. Channel codes are shown in Figure #2 and on the code card attached to the cover plate.Set the DIP
switches from left to right. For example, if channel 11 is desired, its corresponding channel code is: