Anritsu S251C User Manual
Page 68
Step 5. Disconnect the Tx (Transmit) coax from System 1 and connect it to the RF Out
port of the Site Master.
Step 6. Disconnect the Rx (Receive) coax from System 2 and connect it to the RF In
port of the Site Master.
Step 7. Adjust the scale, either manually or by using the
AUTO SCALE
key, to display
the isolation level in the center of the display.
Step 8. Press the
MARKER
key and set markers M1 and M2 to identify the receive band
of the amplifier.
Step 9. Press the
LIMIT
key and set the limit line to the estimated average signal level.
Figure 4-17 displays a typical antenna isolation measurement display.
Typical antenna-to antenna isolation measurements are made between –50 dB and –100 dB
below the 0 dB reference line established by the 2-port calibration.
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Chapter 4 Measurements
Site Master S251C
T x
R x
R F In p u t
R F O u tp u t
A n ten n a
Is o latio n
L ev el
S ite Mas ter S 251C
Gain/Insertion Loss
R x
Figure 4-17.
Typical Antenna Isolation Measurement Display