R&S UPZ
Remote Control via an External PC
Hardware Interfaces
Operating Manual 1120.8610.14 - 0
5
60
4.2.4 Transmission Parameters
To ensure error-free and correct data transmission, the transmission parameters set on
the PC must be adapted to those of the R&S UPZ.
Transmission rate
(baud rate)
The R&S UPZ baud rate is permanently set to 19200 baud and cannot be
changed. The controlling instrument has to adapt its rate to that of the
R&S UPZ.
Data bits
Data is transmitted in 8-bit ASCII code. The least significant bit is the first bit
transmitted
Start bit
Each data byte begins with a start bit. The falling edge of the start
bit indicates
the beginning of the data byte.
Parity bit
A parity bit is
not
used.
Stop bit
A stop bit terminates the transmission of a data byte.
Handshake
A software handshake is switched off (OFF)
The table below contains only a query, which triggers the identification of a R&S UPZ
and a setting command, which performs a channel setting. To comply with the
standardized SCPI commands the *RST command has been included, which ensures
that all R&S UPZ connected switch off their relays and thus open all channels.
Table 4-1 Control commands and queries for the R&S UPZ
Command
Parameter
Remarks
a<addr><type>*idn?<NL>
<addr> = ASCII 0 to 15,
address of the R&S UPZ
<type> = ASCII i, o, I or O,
input or output switcher
Identification query of the controlling
instrument to the R&S UPZ
The response of the R&S UPZ is:
Rohde & Schwarz, UPZ, <x>, <y>
<x> = Firmware version
<y> = Hardware version = Board ID
*RST
-
Default setting of the R&S UPZ with
all channels open
<type><channel><relais><NL>
<type> = Input or output
switcher, see above
<channel> = ASCII a(A)
or b(B), busbar A or B
<relay> = -1 to 128,
channel number in the
R&S UPZ
Channel setting in an input or output
switcher.
When the channel number is
modified, the previous channel is
automatically switched off.
Channel No. 0: all channels are
open.
Example 1:
a0i*idn?<NL>
(identification query to an input switcher at address 0)
Example 2:
a0i*idn?<NL>
(identification query to an output switcher at address 5)
