User's Manual

PINEAPPLE TECHNOLOGY, INC. V-3. DXDPRO-10VH APPLICATI0NS AND INSTALLATION

DXDPRO-10VH MODULATOR MANUAL

THE INFORMATION PROVIDED HEREIN IS PINEAPPLE TECHNOLOGY INCORPORATED PROPRIETARY INFORMATION AND

CANNOT BE COPIED OR DISTRIBUTED WITHOUT PRIOR AUTHORIZATION

V.3 DXDPRO-10VH APPLICATIONS AND INSTALLATION

C. DIGITAL UPGRADE NOTES

The DXDPRO-10VH 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.

IMPORTANT TO NOTE: Modification of FCC approved equipment requires special test and test

equipment. A qualified broadcast engineer should be employed to do this work.

D. 48 VDC OPERATIONS

The DXDPRO-10VH 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-10VH has a built in GPS receiver. The input port is located as show below;

GPS Receiver

Input

Connection