Wavetek 3ST Spezifikationen PDF herunterladen (Seite 13)

2-1

SECTION 2 INSTALLATION

2.1 INTRODUCTION

This section provides information on how to install the 3ST Transmit-

ter.

2.2 UNPACKING AND INSPECTION

The instrument was inspected, and given final operational and quality

control tests prior to being carefully packaged for shipment. The unit

should operate in accordance with the specifications listed in this

manual.

When unpacking the instrument, inspect the shipping container and

instrument for shipping damage. If the container is damaged, phone

Wavetek immediately. Save the shipping carton and packing materials

for possible future use.

FOR CUSTOMER SERVICE call: WAVETEK: (800) 851-1198,

International Customers, contact your local Wavetek Representative.

2.3 INSTALLATION

Proper installation of the Transmitter is essential to correct operation

of the system. The transmitter is typically installed in a headend rack.

There are two different options for setting up the system. One entails

inserting the sweep at a standard combining network input, with a

directional coupler (test point) at the output of the combining net-

work.

Alternately, a directional coupler may be used to insert the sweep at

the output of the combiner. A directional coupler is used to sample

system signals in the headend, and an additional directional coupler is

used to inject the sweep (see figure). The sampling directional

coupler (DC a) may be of any value (dB), but higher values are

typically chosen to limit insertion loss. The sweep insertion direc-

tional coupler (DC b) tap loss must be taken into account when setting

the insertion level of the transmitted sweep signal.

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Wavetek 3ST Spezifikationen Seite 13