Advantech Wireless SSPBM-K150-BRE, Инструкция по установке и эксплуатации

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4.3.3 W
AVEGUIDE
A
SSEMBLY
The
Waveguide Assembly contains a forward and reflected power detector, an RF output
circulator and a waveguide receive reject filter.
The forward power detector and the reflected power detector monitor the RF output power level
and the reflected power level respectively. The detected voltage signals are delivered to the
Power Monitor Module that converts the analog signals in digital signals and delivers them to the
Main Controller Board.
Both the direct and the reverse power are available at the serial ports (RS-232 and RS-485).
The circulator provides a VSWR protection at the SSPB RF output port. The VSWR at the
circulator output is 1.25:1, minimum. The termination load of the isolator is capable of fully
absorbing any reflected power. A WR75 flat type waveguide flange is the unit output.
4.3.4 10 MHz REFERENCE OSCILLATOR
This module is used to generate a highly stable and very low phase noise 10 MHz reference
frequency with a high stability (of
±
5 x 10
-8
MHz/year typical), which is required by all
converter modules. A 10 MHz reference is sent to the converter module via a coaxial cable.
4.3.5 M
AIN
C
ONTROLLER
B
OARD
The
Main Controller Board contains a microprocessor controller that performs all of the
monitoring and control, input/output communication and the decision-making. The main
controller board provides:
1. Fault detection and indication from each module of the unit
2. Mute control and indication
3. Forward RF power indication
4. Reflected RF power indication
5. Redundancy control (for redundant systems)
6. Unit Gain control (attenuation setting) –not available for these units
7. Relay, RS-232, and RS-485 customer interface
13