Rosenberger 19CK010-150, Руководство пользователя

Страница: 8 / 16

User Manual
SMP Calibration Kit
19CK010-150
Rosenberger Hochfrequenztechnik GmbH & Co. KG
P.O.Box 1260 D-84526 Tittmoning Germany
www.rosenberger.com Tel. : +49 8684 18-0
Email : info@rosenberger.com Page
8 / 16
D
ie
se
s
D
o
ku
m
en
t
is
t
ur
he
be
rr
e
ch
tli
ch
g
es
ch
üt
zt
●
T
hi
s
do
cu
m
en
t i
s
pr
ot
ec
te
d
by
c
op
yr
ig
ht
●
R
os
en
b
er
ge
r
H
o
ch
fr
eq
ue
nz
te
ch
ni
k
G
m
bH
&
C
o
. K
G
TRM (7-term) Thru-Reflect-Match
The male and female Short standards of this kit are designed with the same offset length.
So the TRM calibration technique can be used. It requires high reflects with a symmetrical
reflection during VNA calibration on both test ports. TRM needs less connections during
calibration than OSLT.
Recommendation :
The TRM calibration is the recommended calibration method to use as two-port calibra-
tion. It can be used in a SMP male-male, female-female and male-female test port config-
uration.
The standard definition files for the VNAs include a special ‘Reflect’ device, please use it
for a TRM calibration. If no file for the specific VNA is available the standard definitions for
all calibration standards have to be entered manually. The ‘Reflect’ device is derived from
the short calibration standard but the L0, L1, L2 and L3 are all set to zero. This keeps the
symmetry of the ‘Reflect’ that is necessary for the TRM calibration.
Calibration Procedure
The procedures to perform a VNA calibration are very different between the VNA models. Mod-
ern VNA often guide you thru the settings and actions. For details please consult the manual of
your specific VNA.
4.2 Calibration Check
It is advisable to check the calibration after error correction has been performed, particularly
when test port cables and adapters have been used.
During the calibration

Calibration standards can easily be mixed up

Connections may not be tightened or aligned correctly
There might be defects

VNA, e.g. mechanically overloaded test port

Instable test port cables

Mechanically overloaded load

Bent or broken contact fingers
There is no Verification Kit available for SMP connectors. So additional loads and adpaters can
be used to verify the quality of reflection and transmission measurements or short cable assem-
blies of high quality may be used to check for plausible measurement results. This should be
done from time to time to identify defects.