Rohde & Schwarz 1065.6000.20, Operating Manual

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Contents - Maintenance and Instrument Interfaces FSE
1065.6016.12 8.8 E-15
Handshake
Software handshake
In the software handshake mode of operation, the data transfer is controlled using the two control
characters XON / XOFF.
The instrument uses the control character XON to indicate that it is ready to receive data. If the receive
buffer is full, it sends the XOFF character via the interface to the controller. The controller then interrupts
the data output until it receives another XON from the instrument. The controller indicates to the
instrument that it is ready to receive data in the same way.
Cable required for software handshake
The connection of the instrument with a controller for software handshake is made by crossing the data
lines. The following wiring diagram applies to a controller with a 9-pin or 25-pin configuration.
1
2
3
4
5
6
7
8
9
DSUB connector female / 9 poles
1
2
3
4
5
6
7
8
9
DSR
RxD
RTS
TxD
CTS
DTR
GND
DSUB connector female / 9 poles
Instrument Controller
DSR
RxD
RTS
TxD
CTS
DTR
GND
Instrument Controller / PC
1
2
3
4
5
6
7
8
9
DSR
RxD
RTS
TxD
CTS
DTR
GND
1
2
3
4
5
14
15
16
17
6
7
8
9
18
19
20
21
10
11
12
22
23
24
13
25
TxD
RxD
RTS
CTS
DSR
GND
DTR
DSUB connector female / 9 poles
DSUB connector female / 25 poles
Fig. 8-3 Wiring of the data lines for software handshake