Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 393 / 813

R&S
®
ZVA/ZVB/ZVT Channel Menu
1145.1084.12 4.231 E-6
Standard Type Characteristics Ideal Standard
(Dummy
Parameters)
Offset Model Load
Model
Match Matched broadband termination (one-port) Z
0
(reference
impedance of the
connector type)
Sliding match One-port standard with variable load
parameters (sliding load), unspecified
length and zero loss. The reference
impedance is fixed and equal to the
reference impedance of the connector
type
.
The sliding match is measured at 3 to
7 positions of the load for each calibrated
port. This improves effective directivity and
thus the calibration accuracy, in particular
in the high-frequency range where the
Match standards can cause reflections.
– – –
Reflect Unknown mismatched standard (one-port)
Through Through-connection with minimum loss
(two-port)
– –
Line Line for TRL calibration with minimum loss
(two-port)
– –
Attenuation Fully matched standard in both directions
(two-port; the reflection factor at both ports
is zero).
– – –
Symm. network Unknown mismatched reflection-symmetric
standard (two-port)
–
Remote control: For an overview of standard parameters see also
[SENSe<Ch>:]CORRection:CKIT:<conn_type>:<std_type>
Channel - Offset
The Offset menu defines a length offset for the test ports. The offset complements the system error
correction, compensating for the known length of a (non-dispersive) transmission line between the
calibrated reference plane and the DUT.
Offset parameters: Definition
The
Delay is the propagation time of a wave traveling through the transmission line. The
Electrical Length is equal to the Delay times the speed of light in the vacuum and is a measure
for the length of transmission line between the standard and the actual calibration plane. For a
line with permittivity
r
and mechanical length L
mech
the delay and the electrical length are
calculated as follows:
The use of an Electrical Length, Mechanical Length or Delay is therefore equivalent; the
analyzer automatically calculates all three parameters when a single value is entered.
For a non-dispersive DUT, the delay defined above is constant over the considered frequency
range and equal to the negative derivative of the phase response with respect to the frequency
(see mathematical relations). The offset parameters compensate for a constant delay, which is
equivalent to a linear phase response.