Getting started
R&S
®
SMB100B
29User Manual 1178.3711.02 ─ 08
To prepare for connecting
1.
NOTICE! Damaged or not clean connections can lead to RF insertion loss and mis-
match, and even premature wear of the connectors.
Before connecting to the port, inspect the RF connector visually. Check that it is
clean, undamaged and mechanically compatible.
2.
NOTICE! DC voltage at the RF connector can damage the instrument. Never apply
DC voltage to the RF input connectors.
Make sure that the values are within the DC limits given in the data sheet.
3. If your test setup has a DC component at the RF input, insert a DC blocker.
4. Use a high-quality RF cable that matches the RF connector type.
See "Cable selection and electromagnetic interference (EMI)" on page 26.
5. You can connect to two kinds of connectors:
● "To connect to screwable connectors" on page 29
● "To connect to pluggable connectors" on page 29
To connect to screwable connectors
The R&S SMB100B provides screwable RF connectors as in Table 3-1.
►
NOTICE! Excessive tightening can damage the connectors.
To connect the cable with the connector, proceed as follows:
a) Carefully align the connector of the cable and the connector along a common
axis.
b) Mate the connectors along the common axis until the male pin of the inner con-
nector engages with the female socket of the outer connector.
c) Turn the nut of the outer connector until the connectors are firmly coupled.
d) Using a calibrated torque wrench torque the nut to the limit as in the table
below. Hold the opposite connector part stationary with a spanner.
Table 3-1: Connector name, type, size, torque limit and nut opening
Connector
Torque limit
Nut opening
Type Name lb-Inch Nm Inch mm
N RF 50 Ω 13.3 1.5 3/4 20
SMA Ref In 1 GHz
Ref Out 1 GHz
5 0.56 5/16 8
To connect to pluggable connectors
The R&S SMB100B provides pluggable Bayonet Neill-Concelman (BNC) connectors.
► To connect the RF cable with the BNC connector, proceed as follows:
a) Carefully align the connector of the cable and the BNC connector along a com-
mon axis.
b) Mate the connectors along the common axis until the male pin of the connector
of the cable engages with the female socket of the BNC connector.
Preparing for use
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