Olson Technology LCM-300-S User Manual

LCM-300-S

FREQUENCY AGILE

SUB-BAND TELEVISION MODULATOR

INSTRUCTION MANUAL

Phone:

E-Mail: [e-mail]

025-370308 REV B 8/22/01

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Fax:

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www.olsontech.com

LCM-300-S

Specifications

Output Frequency Range.........................

F .C.C. Offset..........................................

Output Power Level................................

Frequency Accuracy / Stability .................

V ideo Performance.................................

Spurious Outputs....................................

Out-of-Band C/N...................................

In-Band C/N..........................................

Audio / V ideo Ratio................................

Channel T -7 (7MHz) through Channel W (300MHz).
Selectable by front panel DIP switch in 2MHz
increments (250KHz internal adjustment)

+12.5KHz tunable by front panel adjustment

+45dBmV typical, +40dBmV minimum per channel
<±5KHz of selected channel frequency

1V P-P input nominal for 87% modulation.
Differential gain <5% Differential Phase <5°

>60dB typical, >55dB minimum below output visual
carrier level

>76dB as measured in a 4.0MHz noise bandwidth

>60dB as measured in a 4.0MHz noise bandwidth

Adjustable from 13dB to20dB below video carrier

Audio Performance.................................

Audio Intercarrier Stability .......................

BTSC Stereo / Mono..............................

Front Panel Controls...............................

Rear Panel Connectors............................

Power Requirements...............................

Chassis Size............................................

500mV P-P for 25KHz deviation, front panel adjust­able. 10K input Z

4.5MHz within ±1KHz

Internal defeat of audio pre-emphasis for BTSC
baseband inputs. Shipped mono mode

RF output adjust
A/V ratio adjust
V ideo & Audio modulation
F .C.C. offset adjust
Channel select DIP switches

RCA type video/audio input
T ype F RF output

5V @ 100mA, 10V @ 370mA and 24V @ 3mA

7”D x 1.125”W x 1.75”H

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1.) INTRODUCTION

The Olson T echnology LCM-300-S is a sub-band frequency agile F .C.C. compatible modulator in a 7”D x
1 1/8”W x 1 3/4”H desktop chassis. The LCM-300-S may be operated at 45dBmV typical, +40dBmV
guaranteed minimum. No IF loops are provided on this modulator .

The LCM-300-S modulator will operate on any sub-band, standard, or cable channel from 5MHz –
300MHz. All channels are selectable by front panel DIP switches and a front panel adjustment allows setting
to F .C.C. offset frequencies, HRC frequencies are available.

The LCM-300-S is designed to be operated in the LCM-550-RKA rack assembly .

Note: The LCM-300-S is shipped with channel T7 selected.

The LCM-300-S offers the unique Olson T echnology feature of >76dB out-of-band C/N ratio. SA W
filtering is used for adjacent channel operation and provides 55dB of spurious free dynamic range.

LCM-300-S

Sub-band Frequency Agile –T elevision Modulator

The LCM-300-S has low power consumption for economical and reliable long-term operation.

025-370308 REV B

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