Specifications

Getting Started

1.1 Scope of this Manual

1.1.1 Who Should Use This Manual

This manual is intended for operators/users of the SBM75e of Network L-Band and 70/140 MHz

Satellite Modulators to assist in the installation, operation, fault-finding and maintenance of the

equipment. Throughout this manual, this product is referred to as the ‘SBM75e Modulator ’.

WARNING

DO NOT REMOVE THE COVERS OF THIS EQUIPMENT. HAZARDOUS VOLTAGES ARE PRESENT WITHIN

THIS EQUIPMENT AND MAY BE EXPOSED IF THE COVERS ARE REMOVED. ONLY ADVANTECH AMT

TRAINED PERSONNEL AND APPROVED SERVICE ENGINEERS ARE PERMITED TO SERVICE THIS

EQUIPMENT.

Caution

Unauthorised maintenance or the use of non-approved replacements may affect the equipment

specification and invalidate any warranties.

This Installation and Operation Manual does not include any procedures which require the

removal of any equipment covers.

1.1.2 Version Information

This manual has been written to cover Software Version 1.0.7 and later.

1.1.3 Equipment Covered by this Manual

This manual covers the SBM75e L-Band Satellite Modulator (16” unit) and the L-Band and

70/140 MHz Satellite Modulator (20” unit).

1.1.4 RF/IF Interface Options

The SBM75e Modulator is provided with the following outputs:

 L-Band (950 – 2000 MHz)

 IF (70/140 MHz)

1.1.4.1 Modulator L Band Output

The L-Band output signal is presented on the rear panel of the Modulator (BNC female, 50Ω). If

the Modulator has been ordered with the BUC power option then the DC voltage is switched

onto the inner conductor of this connector. When installing the Modulator to the system, BUC

power should be turned off.

1.1.4.2 Modulator IF Output

The IF output signal is presented on the rear panel of the Modulator (BNC female, 50Ω).

Caution

With BUC power enabled, there is a potentially damaging DC voltage applied to the

Modulator output. When connecting test equipment, or a local Modulator (or any DC

coupled devices), always use appropriate DC blocks, and disable BUC powering.

1-2 SBM75e Series Modulator Installation and Operation Manual