Performance Tests
Performance Test 3
3-31
Attenuation Accuracy – 50
Ω
Leveling Head (Optional 96040A and 96270A)
Equipment required for this test:
• Measuring Receiver
• Attenuator, 6 dB, 50 Ω, N-Type
• 50 Ω Leveling Head (supplied with UUT)
Note
In the subsequent tests, the tolerances shown refer to specifications
listed in the Chapter 1, Specifications section of this manual. In
some cases the test limits must be altered due to the uncertainty of
the actual equipment used. For example, if the Instrument
specification is ±0.025 dB and the Measuring Receiver uncertainty is
±(0.015 dB + 0.005 dB per 10 dB step) the test limit for 30 dB would
be ±0.039 dB (the root-sum-square of 0.025 and 0.030).
To verify the attenuation accuracy of the UUT output relative to +10 dBm, 50 Ω:
1. Connect the Leveling Head to the RF INPUT of the Measuring Receiver via a
6 dB attenuator and connect the REF FREQUENCY OUTPUT (rear panel)
from the UUT to the Spectrum Analyzer Ext Ref In (on rear). See Figure 3-8
for equipment connections.
Front
Rear
50 Ω Leveling
Head
6 dB Attenuator
RF Input
Ext Ref Input
Spectrum Analyzer
Ref Frequency
Output
Instrument
hpn220.eps
Figure 3-8. Equipment Connections - 50 Ω Leveling Head Attenuation Accuracy Test
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