R&S UPZ
Remote Control via an External PC
Hardware Interfaces
Operating Manual 1120.8610.14 - 0
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The 9-contact male connector labelled TO NEXT serves for connecting the next
R&S UPZ when several switchers are cascaded.
The connectors are wired differently in order to ensure smooth communication by
means of normal RS-232-C extension cables independently of the complexity of the
setup. This is shown in
TO NEXT
FROM PREVIOUS
1
2
3
4
5
6
7
8
9
1
2
3
4
5
9
8
7
6
+5,8V
CTS
CTS
RTS
RTS DSR
TxD
RxD
RxD
TxD
Fig. 4-1 Pin assignment of the D-sub connectors
4.2.2 Characteristics of the Interface
●
Serial data transmission in asynchronous mode
●
Bidirectional sequential data transmission via two separate lines
●
Permanent transmission rate of 19200 baud
●
Signal level logic 0 from +3 V to +15 V
●
Signal level logic 1 from -3 V to -15 V
●
Hardware handshake RTS/CTS
4.2.3 Signal lines
RxD
(Receive Data)
(Receive Data) Input; data line for transmission from the
controlling instrument to the R&S UPZ
TxD
(Transmit Data)
(Transmit Data) Output; data line for transmission from
the R&S UPZ to the controlling instrument
DSR
(Data Set Ready)
(Data Set Ready) Output; a high level informs the
controlling instrument that the R&S UPZ is ready for
operation
GND
(Ground)
(Ground) Interface ground, connected to the R&S UPZ
ground
RTS
(Request To Send)
(Request To Send) Output; the R&S UPZ informs the
controlling instrument that it is ready to receive
CTS
(Clear To Send)
Clear To Send) The controlling instrument informs the
R&S UPZ that it can send data.
