R&S FSH
Two-port measurements with the tracking generator
1145.5973.12 4.91
E-11
Settings for detection of the R&S FSH-Z3 in transmission and spectrum
measurements
Operation:
Press the SETUP key.
Select the HARDWARE SETUP softkey.
Select ACCESSORY from the menu by using the
rotary knob or the cursor keys and confirm the entry
with the ENTER key.
.
The R&S FSH opens a menu where different modes
for detecting the R&S FSH-Z3 bridge can be selected.
Select AUTO DETECT or BRIDGE FSH-Z3 from the
menu by using the rotary knob or the cursor keys
and confirm the entry with the HARDWARE SETUP
softkey or the ENTER key.
If you select AUTO DETECT, the VSWR bridge is
detected automatically as soon as the control cable
has been connected to the probe power socket on the
R&S FSH.
If you select BRIDGE FSH-Z3, the VSWR bridge is
detected by default. This setting may be useful if you
only work with the R&S FSH-Z3 connected and do not
want to waste time on automatic detection.
Supplying DC voltage to active DUTs
By using the VSWR Bridge R&S FSH-Z3, DC voltage can be supplied to active DUTs such as
amplifiers through the integrated bias tees (BIAS 1 and BIAS 2) via the RF cable. The DC voltage is fed
in from a suitable external power supply (max. 300 mA/max. 50 V). To measure the antenna coupling of
mobile radio base stations, the DC voltage must be supplied to two tower-mounted amplifiers (TMA).
This is done by applying a suitable voltage at the BIAS 1 and BIAS 2 BNC inputs of the VSWR bridge.
Reflection measurements
The VSWR Bridge R&S FSH-Z2 or R&S FSH-Z3 is required for reflection measurements. However, an
equivalent bridge (e.g. the R&S ZRB2 from Rohde & Schwarz) can be used.
Connect the control cable of the R&S FSH-Z2/-Z3 to the power sensor socket of the R&S FSH.
Connect the RF connectors of the R&S FSH-Z2/-Z3 to the RF input and generator output of the
R&S FSH (see labeling on VSWR bridge).
