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LPOD C-, X-, or Ku-Band Outdoor Amplifier / Block Up Converter (BUC) MN-LPOD

Introduction Revision 10

1–5

Figure 1-3. LPOD PS 2 Block Diagram

1.4.2 SSPA Module

The amplifier module performs the core function of the unit. An isolator is at the RF input to

ensure good voltage standing wave ratio (VSWR). The RF signal then passes through an

electronically controlled attenuator that adjusts the overall attenuation according to the user

input. After some amplification, a second attenuator is automatically controlled via a look-up

table to maintain the amplifier gain at a constant level over temperature variations.

The RF signal is then amplified by a multi-stage design that utilizes proprietary combining

techniques to meet the rated power requirements. The output circuitry contains a coupler to

provide a sampled signal for monitoring purposes. A power detector circuit also is included and

the reading can be accessed via remote communication. A high power circulator and load is

located at the output to provide good VSWR and protection from external mismatch.

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Comtech EF Data LPOD Spezifikationen Seite 23