Olson Technology DSK-300-S User Manual

DSK-300-S

FREQUENCY AGILE SUB-BAND

TELEVISION MODULATOR

INSTRUCTION MANUAL

025-000377 REV E

8/7/01

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DSK-300-S

Specifications

Output Frequency Range........................... Channel T -7 (7MHz) through Channel W (300MHz). Selectable by

front panel DIP switch in 2MHz increments (250KHz internal
adjustment)

F .C.C. Offset............................................... +12.5KHz tunable by front panel adjustment

Output Power Level ................................... +40dBmV minimum per channel

Frequency Accuracy / S tability .................. <±5KHz of selected channel frequency

Video Performance..................................... 1V P-P input nominal for 80% modulation. Differential gain <5%

Differential Phase <5°

Spurious Outputs ........................................ >60dB below output visual carrier level typical, 55dB min.

Out-of-Band C/N ........................................ >76dB as measured in a 4.0MHz noise bandwidth

In-Band C/N ............................................... >60dB as measured in a 4.0MHz noise bandwidth

Audio / Video Ratio .................................... Adjustable from 13dB to 20dB below video carrier

Audio Performance..................................... 500mV P-P for 25KHz deviation, front panel adjustable.

10K input Z

Audio Intercarrier S tability ........................ 4.5MHz within ±1KHz

BTSC Ster eo / Mono.................................. Internal defeat of audio pre-emphasis for BTSC baseband inputs.

Shipped mono mode

Front Panel Controls .................................. RF output adjust

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

Rear Panel Connectors .............................. RCA type video/audio input

T ype F RF output

Power Consumption.................................... <12 watts

Chassis Size ................................................. 2”H x 6.75W x 5.75D

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1.) INTRODUCTION

The Olson T echnology DSK-300-S consists of one sub-band frequency agile F .C.C. compatible modulator
in a 5 ¾”D x 6 ¾”W x 2”H desktop chassis. The DSK-300S may be operated at 45dBmV typical,
+40dBmV guaranteed minimum. No IF loops are provided on this modulator .

The DSK-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.

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

The DSK-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 typically 60dB of spurious free dynamic range.

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

DSK-300-S

Sub-band Frequency Agile –T elevision Modulator

2.) CHANNEL SELECTION

Channel frequencies are selected by setting the 10-position DIP switch (visible through the vertical slot in the
front panel). The front panel is illustrated in figure 1.

Switch-setting codes for sub-band channels are shown in T able 1. Switch-setting codes for standard
channel frequencies can be found in T able 2 in this manual, HRC code settings are shown on T able 3. The
front panel illustration in Figure 1 shows a switch properly set for sub-band channel T7.

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Figure 1 – DSK-300-S Front Panel

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