Addlestone, BH132, Hum Rejection Unit with Equalisation
- Brand:ADDLESTONE
- Product Code:BH132
- Availability:Please Call or Email Us to Check Availability
ADDLESTONE, BH132, Hum Rejection Unit with Equalisation
The BH132 inserted into the cable run the incoming coaxial cable is isolated from the outgoing coaxial cable. This is achieved using an Optocoupler in the circuitry.
The isolation this provides enables the total rejection of any longitudinal hum caused by circulating earth currents in the cable up to a maximum of 90 volts peak to peak. This prevents the appearance of Hum Bars on the video monitor.
The unit has three lift controls: Gain, High Frequency Lift and Medium Frequency Lift. Adjusting these controls enables the unit to act as a basic line corrector for use over short to medium cable runs when used in conjunction with a Launch Amplifier.
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TECHNICAL
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DESCRIPTION
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INPUT SIGNALREQUIREMENTS
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Composite video using colour / monochrome video signals or other wide band signals within a frequency bandwidth of 30Hz to 5MHz. |
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INPUT SIGNAL AMPLITUDE
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Nominal 1 volts peak to peak.
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OUTPUT SIGNAL AMPLITUDE
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Nominal 1 volt peak to peak (unbalanced) or 2 volts peak to peak (balanced) |
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AT UNITY GAIN
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Differential Phase <3 degrees /Differential Gain <3%.
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INPUT IMPEDANCE
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75 ohms.
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| OUTPUT IMPEDANCE |
75 ohms via BNC socket or 150 ohms via twisted pair
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INPUT-OUTPUT CONNECTIONS
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75 ohm BNC connectors for unbalanced input. 75 ohm BNC socket for unbalanced output / Binding pole
terminals for balanced twisted pair output. |
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ELIMINATION OF LONGITUDINAL HUM
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Automatic rejection to a maximum of 90 volts peak to peak
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GAIN CONTROL
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Adjustable between -3dB and +6dB.
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FREQUENCY RESPONSE
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30Hz to 8MHz flat to within ±1dB at unity gain.
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AT UNITY GAIN
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Differential Phase <3 degrees / Differential Gain <3%.
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GAIN CONTROL
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Variable from –2dB to +6dB.
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HIGH FREQUENCY LIFT
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Adjustable between -3dB and +6dB.
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MEDIUM FREQUENCY LIFT
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Adjustable between -1dB and +6dB.
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OUTPUT BALANCE CONTROL
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For twisted pair output only – this is factory set but may be adjusted if required.
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POWER REQUIREMENTS
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12 Volts DC .Two separate 12V supplies required
(Supplied with unit). |
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POWER CONSUMPTION
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Approximately 0.8 Watts.
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OPERATING TEMP. RANGE
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-10°C to +40°C.
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WEIGHT OF EQUIPMENT
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270 grams. |
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DIMENSIONS
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Length 155 mm Height 44 mm Width 85 mm (excluding connectors ) |