GUI Reference
R&S
®
ZNB/ZNBT
446
User Manual 1173.9163.02 ─ 38
The "More Ratios..." button opens the
dialog which allows to select an
of wave quantities.
b<i> / a<j> Source Port <j> (softkeys)
Selects predefined complex
of the standard 2-port wave quantities a
1
, a
2
, b
1
, and
b
2
.
The predefined wave quantities can all be obtained with the same test setup, where a
2-port DUT is connected between the analyzer ports 1 and 2. The stimulus signal is
provided by the analyzer port 1 or 2 ("Source Port").
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
ter 5.9.2.2, "More Ratios Dialog"
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.
Remote command:
CALCulate<Ch>:PARameter:MEASure
Create new trace and select trace name and measurement parameter:
CALCulate<Ch>:PARameter:SDEFine
5.9.2.2
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..."
Meas Softtool
