Olson Technology S890D User manual

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S890D
TELEVISION DEMODULATOR
INSTRUCTION MANUAL
025-000487 REV A 3/15/04
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E-Mail: [email protected]
www.olsontech.com

025-000487 REV A Page 2
S890D
NTSC Version
DESCRIPTION:
The OLSON TECHNOLOGY INC. S890D is a high quality television demodulator with front panel selectable
tuning. The unit is capable of tuning any VHF, UHF or cable channel from 54.00 to 801.25MHz in 1MHz incre-
ments. HRC channels may be tuned by setting the internal offset switches.
An I.F. test point is provided on the rear panel to monitor the tuner output or to drive an upconverter.
There are two 75 ohm video outputs with switchable audio subcarrier. The audio subcarrier is also available on a
separate connector.
The audio output is balanced and drives a 600 ohm load. An MPX output is provided for stereo applications.
The S890D occupies 44.5mm (1.75 inches) of a standard width 483mm (19.0 inches) equipment rack.
FREQUENCYSELECTION:
The DIP switch tables, listing all available video frequencies, are included. One for standard frequencies
(XXX.25MHz) and one for HRC frequencies (XXX.00MHz). The unit is shipped with STANDARD frequencies
selected. To select HRC frequencies, remove the top cover and find the 6 position DIP switch SW2 near the front,
behind the front panel DIP switches.
The DIP switch tables show all 16 front panel switches. From left to right, the first 10 positions are the L.O.
synthesizer divide by “N” select. The least significant bit is on the left. The 11th position is not used. 12 through 15
are tuner band switching. The 16th position is AFC - UP or ONE is OFF and DOWN or ZERO is ON. The
tables show this switch as a ONE. AFC is OFF in this position and is turned ON only when the received signal is
subject to frequency drift.

025-000487 REV A Page 3
The switches on SW2 are numbered 1 through 6 and “ON” is indicated with an arrow pointing to the right. The
following table shows the settings for STANDARD and HRC frequencies.
0 = ON 1 = OFF
Switch No. 123456
STANDARD 000000
HRC 000011
RF input levels can range from -10dBmV to +25dBmV. Video output level is constant over this range at 1 volt p-p
into 75 ohms.
There is a front panel “POWER” indicator when the unit is connected to the proper power source. The AC power
required is printer on the rear panel near the power cord.
The fuse rating is also printed on the rear panel. Always replace fuse with the correct rating.
Unused outputs do not need to be terminated for correct operation.