Allice Messtechnik R&S ZND, User Manual, Page: 245 / 1252

GUI reference
R&S
®
ZND
245 User Manual 1173.9557.02 ─ 61
The predefined wave quantities correspond to the 2-port S-parameters:
●
"b1/a1 Source Port 1" is the ratio of the wave quantities b
1
and a
1
, measured at
port 1. This ratio corresponds to the S-parameter S
11
(input reflection coefficient).
●
"b2/a1 Source Port 1" is the ratio of the wave quantities b
2
and a
1
and corresponds
to the S-parameter S
21
(forward transmission coefficient).
●
"b2/a2 Source Port 2" is the ratio of the wave quantities b
2
and a
2
, measured at
port 2. This ratio corresponds to the S-parameter S
22
(output reflection coefficient).
●
"b1/a2 Source Port 2" is the ratio of the wave quantities b
1
and a
2
and corresponds
to the S-parameter S
12
(reverse transmission coefficient).
The analyzer can also measure arbitrary ratios for other source ports; see Chap-
ter 5.2.2.2, "More Ratios dialog" , on page 245.
Tip: In the trace list, the source port is indicated in brackets. "b2/a1(P1)" denotes the
ratio b
2
/a
1
with source port 1.
Note: For a unidirectional R&S ZND (see Chapter 4.1.4.3, "R&S ZND: unidirectional
vs. bidirectional operation" , on page 80) ratios for source port 2 are not available.
Remote command:
CALCulate<Ch>:PARameter:MEASure "<Trace_Name>", "B2/A1" | ...
CALCulate<Ch>:PARameter:SDEFine "<Trace_Name>", "B2/A1" | ...
5.2.2.2 More Ratios dialog
The More Ratios dialog allows you to select arbitrary ratios between wave quantities b
i
,
a
j
as measured quantity. The ratios can be calculated with arbitrary source port and dif-
ferent detector settings.
Access: TRACE – [MEAS] > "Ratios" > "More Ratios..."
Background information
Refer to the following sections:
●
Chapter 4.3.5.1, "Wave quantities" , on page 117
●
Chapter 4.3.5.2, "Ratios" , on page 118
Meas softtool
www.allice.de Allice Messtechnik GmbH