R&S Z3 Manual Del Usaurio página 34

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R&S -Z3
Performance Test of Return Loss at 108 MHz to 118 MHz Range
4.3 Performance Test of Return Loss at 108 MHz to
118 MHz Range
To perform the test
1. Adjust the network analyzer settings:
● Source Power: 0 dBm
● Ref. Level: 0 dB
● Ref. Attenuator: 0 dB
● Center frequency: f
● Span: 150 MHz
2. Insert the long antenna rods on the side of the antenna head using the snap-
in connectors.
3. On the network analyzer, set markers at:
● 108 MHz
● 113 MHz
● 118 MHz
4. Measure the S11 parameter. It should be ≤ -8 dB (see
5. On the network analyzer, change the frequency range to:
● f = 108 MHz
start
● f = 118 MHz
stop
6. Set the marker to maximum mode.
7. Measure the S11 parameter. It should be ≤ -8 dB (see
Figure 4-1: Typical return loss at 108 MHz to 118 MHz range
Manual 5202.9444.02 ─ 01
= 113 MHz
center
Functional Test
Figure 4-1).
Figure 4-1).
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