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

025-000237 REV B Page 2
LCM-500-550 B/G
FREQUENCY AGILE - TELEVISION MODULATOR
1) INTRODUCTION
The Olson Technology LCM-500-550 B/G is a frequency agile television modulator. This unit will provide
>+55dBmV output on any channel from 48.250MHz to 543.250MHz. All channels are selectable by front
panel DIP switches in 1MHz increments. Also provided with the LCM-500-550 B/G is a high level (+35dBmV)
combined video/aural i.f. loop.
The LCM-500-550 B/G 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
dynamic range. These features allow virtually unlimited numbers of LCM-500-550 B/G’s to be combined
without the need for external bandpass filters.
The LCM-500-550 B/G has low power consumption (8 watts, 100-240 VAC @ 50/60Hz) 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 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
Output frequency selection is made by properly setting the 12-position DIP switch to the corresponding
code. Codes are shown in the rear of this manual. Set the DIP switches from left to right. For example, if
206.250MHz is desired, its corresponding channel code is: