Rohde & Schwarz ESW Series, User Manual

Page: 105 / 759

Measurements and Result Displays
R&S
®
ESW
105 User Manual 1177.6298.02 ─ 08
For spectrum measurements, you can also define a sweep count. The sweep count
defines the number of measurements a single sweep is made up out of. If the sweep
count is 0 or 1, the R&S
ESW runs a single measurement from start to stop frequency.
If the sweep count is greater than 1, the R&S ESW repeats the measurement from
start to stop frequency a corresponding number of times.
For more information on the effects of the sweep count on the measurement results,
see
Chapter 11.3.1.2, "Analyzing Several Traces - Trace Mode" , on page 203.
9.3.1.3 Line Impedance Stabilization Network (LISN) Control
When you do measurements on power lines, a Line Impedance Stabilization Network
(LISN) allows you to determine the interference caused by power supplies and cables.
The R&S
ESW allows you to connect and control selected LISNs in such a test setup
and considers the characteristics of the LISN during measurements. In addition to
selecting a particular
LISN Type , you can also select the Phase that you want to test
for interference.
Control of a LISN and its phases is possible during scans and during the final mea-
surement. You can control all available LISN phases as required and independently
from each other.
If you select more than one phase, the R&S ESW measures all phase combinations
and determines the maximum value.
Table 9-1: Supported networks and controllable phases
Network Controllable phases
Two-line V-networks
R&S ESH3-Z5 N, L1
R&S ENV216 N, L1
Four-line V-networks
R&S ESH2-Z5 N, L1, L2, L3
R&S ENV4200 N, L1, L2, L3
R&S ENV432 N, L1, L2, L3
When you are using the R&S ENV216 network, you can protect the input with a
150
kHz high-pass filter .
Connecting a LISN
A LISN is connected to the R&S ESW via its user port. To connect the LISN to the
R&S ESW, a control line and an adapter are required.
The control line (or cable) controls which phase of the LISN is to be tested and outputs
the information to the user port. Control lines for the supported LISNs are available as
accessories from Rohde
& Schwarz.
Connecting the control line to the user port of the R&S ESW also requires adapter
R&S EZ-27 (order no. 1142.8271.02).
Test Automation