Olson Technology OTD-3000-BG - Manual (Page 2)

025-000388 REV B Page 2
OTD-3000-B/G
FREQUENCY AGILE TELEVISION DEMODULATOR
PAL B/G STANDARD
1) INTRODUCTION
The Olson Technology OTD-3000-B/G is a frequency agile television demodulator that will select VHF,
UHF or cable channels from 48.25 to 855.25MHz. SAW filtering is used for excellent adjacent channel
operation.
The OTD-3000-B/G provides 2 outputs for video (each at 1 Volt), audio (balanced) at .5 Volt, MPX audio
(unbalanced, without de-emphasis) at .5 Volt, 5.5MHz aural subcarrier at > +35dBmV, and unfiltered I.F..
This unit is also capable of providing a composite video output (video with 5.5MHz aural subcarrier
present). Power consumption is 10 Watts at 220 VAC.
2) INSTALLATION
Mount the unit in a standard equipment rack and provide it with a source of AC power.
For proper ventilation, it is desirable to allow an empty space above and below the unit in the rack. A space
the same height as the OTD-3000-DC would be adequate. Try to avoid locations that are extremely hot or
moist or which have extreme temperature variations.
3) INPUT CONNECTION
Connect the signal to be demodulated to the VHF/UHF input on the rear of the OTD-3000-DC. For
optimum quality, the input signal level should be a minimum of +5dBmV and may be as high as +20dBmV.
The unit will function with input levels below +5dBmV, but the signal to noise ratio will be degraded as the
level is lowered.
This unit incorporates a video squelch circuit that is set to cut off the video output at input levels below
approximately -30dBmV.
4) REAR PANEL OUTPUT CONNECTIONS
A) Demodulated video is available at both of the video output F-fittings. The output level is internally set
for approximately 1V P-P for a fully-modulated video carrier when terminated in 75
Ω
.
B) Demodulated baseband audio is available at the two audio out screw terminals. This is a balanced
output that will easily drive a 600 ohm load and is internally set to provide approximately .5V P-P on
program peaks. Either terminal may be grounded for applications requiring an unbalanced output.
C) MPX audio (audio output without de-emphasis) is available at the unbalanced MPX output
F-fitting. This output will provide approximately .5 V into 75 Ohms on program peaks.