R&S FSH series User Manual

90
PD 1309.6269.62-02
3.5 Power and Return Loss
Measurements with the
R&S FSH-Z14 or the R&S FSH-Z44
The Directional Power Sensors R&S FSH-Z14 and
R&S FSH-Z44 are connected between the source
and the load and measure the power fl ux in both
directions, i.e. from the source to the load (forward
power) and from the load to the source (reverse
power). The ratio between reverse power and forward
power is a measure of the load matching and is
displayed as the return loss or standing wave ratio.
The R&S FSH-Z14 and the R&S FSH-Z44 have
an asymmetrical design and must therefore be
inserted into the test setup in such a way that the
FORWARD arrow on the sensor points toward the
load (= in the direction of the power fl ux).
They are driven and powered via a special serial
interface.
1 Directional Power Sensor R&S FSH-Z44
2 Source
3 Load
3 Power sensor socket
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R&S FSH series Specifications

General

Input Impedance	50 Ω
Display	640 x 480 pixels
Tracking generator	Optional
Interfaces	USB, LAN
Third Order Intercept (TOI)	+15 dBm typical
Input VSWR	≤1.5:1 (typical)
Input Connector	N (f)
Power Supply	100 V to 240 V
Frequency range	9 kHz to 3.6/8/13.6/20 GHz
Battery life	Approx. 4 hours (standard battery)