User's Manual

PINEAPPLE TECHNOLOGY, INC. V.3. DXDPRO-10U APPLICATIONS AND
INSTALLATION
DTXPRO-10U OPERATING AND SERVICE MANUAL
CANNOT BE COPIED OR DISTRIBUTED WITHOUT PRIOR AUTHORIZATION
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V.3 DXDPRO-10U APPLICATIONS AND INSTALLATION
C. DIGITAL UPGRADE NOTES
The DXDPRO-10U is suitable for upgrading analog transmitters to digital service. Special attention must be
given to every detail of the conversion to insure that the desired objective is met and that it is compliant with
FCC requirements. The equipment used to make a conversion is expensive and can be costly. The
following needs to be considered when making a conversion to digital from analog;
1. Replace the modulator with a good quality digital modulator with adaptive linear and non-linear
correction
2. Check the drive level required to achieve the desired output power level from the transmitter. A
driver may be required after the modulator
3. The output band pass filter will have to be replaced with a MASK FILTER. Consider using a Mask
Filter that is rated at 1.25 times the desired output power level.
4. Digital transmitters and mask filters need to be correctable by the modulator. This will require the
addition of dual directional couplers before and after the mask filter to provide correction signals.
5. IMPORTANT: Modification of FCC approved equipment requires special tests, test equipment and
knowledge of regulatory compliance with appropriate FCC documents and rules. A qualified
Broadcast Engineer should be employed to do this work.
D. 48 VDC OPERATIONS
The DXDPRO-10U Modulator is designed to be used with an external 48 VDC supply similar to those found
at TELECOM SITES. If the Modulator is used with standard AC supplied power sources the DC backup
can be automatically switched with internal circuits. The battery charge level can be monitored on the front
panel or on the web page. The operating range is from 42 to 52 VDC.
E. GPS RECEIVER ACTIVATION
The DXDPRO has a built in GPS receiver. The input port is located as show below;
GPS Receiver
Input
Connection
THE INFORMATION PROVIDED HEREIN IS PINEAPPLE TECHNOLOGY INCORPORATED PROPRIETARY INFORMATION AND