Norsat O3b 5W BUC - Manual (Page 5)

Rev. 1.0
7005STC-O3B Series
DES007565
5
1.2.1 IF unit
IF unit amplifies the transmission signal from a remote modem and delivers it to the Up-converter unit.
1.2.2 LO unit
LO unit generates two local signals to drive two LO ports of the up-converter using double
conversion structure.
1.2.3 Up-converter unit
Up-Converter converts the IF signal (7005STC-O3B-A:1052-1788 MHz, 7005STC-O3B-B: 972-
1871 MHz) to RF signal (7005STC-O3B-A: 27.652-28.388 GHz, 7005STC-O3B-B: 28.172-29.071
GHz) and also filters out unwanted spurious and harmonics in front of SSPA. The BUC uses a
double-conversion technology to achieve better performance and cost- effective design.
1.2.4 SSPA unit
The main function of SSPA is to boost up the transmit power of the input signal to an expected level.
1.2.5 DC M&C unit
This board includes a DC/DC converter, regulators, and a EMI/EMC filter to make all kinds of DC
voltages required in the BUC. It also contains a Monitor and Control (M&C) function to monitor and
control the BUC, and communicate with a remote modem unit. The key parts for the M&C function
are a microprocessor and communication ICs for RS-232 and Ethernet.
1.3 IMPORTANT PRECAUTIONS
Read all the following instructions prior to using the BUC.
1.3.1 Reading Introduction
There is a potential safety risk unless appropriate precautions are taken while working with the
BUC. All the precaution and danger notes must be carefully read before beginning to use the
BUC.
1.3.2 ESD Protection
The BUC contains elements sensitive to electrostatic discharges (ESD). It is important that the staff
is ground- connected while they are working with them.
1.3.3 Washing
Do not use liquid washing products or aerosols. Only use a damp cloth for cleaning.