Olson Technology LCM-500-550 User Manual

LCM-500-550

TELEVISION MODULATOR

INSTRUCTION MANUAL

Phone:

E-Mail: [e-mail]

025-000181 REV C 6/20/01

[phone]
[phone]

Fax:

[phone]

www.olsontech.com

1) INTRODUCTION

The Olson T echnology 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 T echnology feature of >75dB out-of-band carrier to noise ratio.
Also, this unit uses SA W filtering for adjacent channel operation, and it provides 60dB of spurious free dy­namic 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

LCM-500-550

FREQUENCY AGILE - F .C.C. COMP ATIBLE

TELEVISION MODULA TOR

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:

025-000181 REV C

Page 2