Download C.A.S. - Analyzer

6.2.4
Antenna Connection
An active receiver antenna adjusted to the DCF77-station broadcasting frequency can be
connected here. The antenna mechanism demodulates the received signals and outputs them
as an open-collector TTL signal. The pull-up resistor required for the open-collector output is
already integrated into the C.A.S. Analyzer. A stable operating voltage of +5 V for the antenna
is supplied by the C.A.S. Analyzer.
The antenna output signal must be able to generate a logic LOW-level output of the DCF77
signals; refer to the diagram below:
Connect one single receiver antenna only to this connector. Observe the maximum antenna
load (refer to section 10.1 „Electrical Specifications“).
Warning!
The antenna connector must not be short-circuited. A short-circuited aerial cable may lead to
cable or device overheating and may cause a fire. In addition, parts inside the device or the
antenna may be damaged or destroyed.
6.2.5
SCB / LCB Connectors
6.2.5.1 Communication Connectors
There are altogether eight data busses (“SPKR DATA BUSSES”), and 128 SCBs / LCBs can be
connected to each of them. All data busses are equal, meaning that there is no allocation of
the data busses to the 100-V speaker lines.
The signal is balanced and features a maximum stroke of ±2.5V. The communication busses
are electrically separated from the Analyzer but share the same voltage source and mass.
They are supplied via the SUPPLY connectors.
Communication with the SCBs / LCBs is established using the semi-duplex method. The
signal output by the Analyzer is generated by a UART and has a data rate of 9,600 baud.
Use only shielded cables for wiring the communication busses. Failing to do so may result in
interference emission affecting the operation of neighboring devices.
Warning!
6.2.5.2 Voltage Supply
The operational voltage (that also supplies the SCBs / LCBs) must be fed to the SUPPLY
connectors. Both balanced and unbalanced voltages can be input here.
C.A.S. - Analyzer
Connections and Operation 15