Olson Technology LCM-550x1-Series - Manual (Page 38)

025-000350 REV B Page 3
INTRODUCTION
The LCD-550 is a small low cost demodulator for use in cable and off-air applications. It is designed to mount
in Olson Technology’s LCM-550-RKA rack mountable chassis. The demodulator is shipped in both single (LCD-
550X1) and dual (LCD-550X2) versions. Both versions occupy 3 slots in the LCM-550 RKA chassis.
The units have a single RCA type audio output connector. The type of signal at this connector is selected from
3 types by internal jumpers. The user can choose normal audio, multiplex audio, or subcarrier. RF Input and Video
Output connectors are “F” type. See Figure 2 for connector location.
The demods have an LED that indicates low input levels. This LED also flashes with invalid tuning settings.
(LED is labeled “NO VIDEO” on some early models)
INSTALLATION
Units are shipped in the + .25MHz frequency tuning mode with normal audio output. PAL versions tune by
frequency only with three front panel rotary switches. If other settings are required, go to page 4 for instructions.
Slide the unit into the rack shelf, making sure that the notch on the rear of the unit engages the tab on the shelf.
Install and tighten the front thumb screw.
Connect the Audio and Video Output cables and the RF Input cable. Note that the combiner on the rear of
some LCM-550 rack shelves is for outputs, not inputs. It is recommended that units be added with the rack assembly
powered down, but they can be added hot as long as the long ground pin makes contact first. Connect the power
cable(s).