Advantech AMT SSPB-Ci60, Installation And Operating Manual

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SSPB-Ci60
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 CPR137 grooved 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 each 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 (if working in the 1:1 redundancy mode)
6. Unit Gain control (attenuation setting)
7. Relay, RS-232 and RS-485 customer interface
4.3.5.1 FAULT Detection and Indication
The unit will automatically go into a shutdown mode (MUTE) and send a message to all of the
external interfaces (including the red Tx LED) when any one of the following occurs:
1. The local oscillator within an up-converter module is out of lock.
2. The hotspot temperature exceeds 85
°
C.
3. Any of the GaAs FET devices failed.
4. Reflected power is greater than 41 dBm (6 dB back-off from the rated P1dB).
The SSPB continually monitors the internal temperature and the current consumption. It also has
an automatic shutdown feature to prevent operation at excessive temperatures. The unit will
automatically restart when the hotspot temperature falls below to 65°C.
A thermal alarm may result from any one of the following conditions:
1. High ambient temperature (the SSPB Up-Converter is designed to operate between -30
°
C
and +55°C ambient).
2. Blockage at the air intake or exhaust vents.
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