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146 Chapter 4
ESA Functional Tests
Reference Level Accuracy
ESA Functional Tests
Reference Level Accuracy
Test Limits
Test Description
A 50 MHz CW signal is applied to the Input of the analyzer. The amplitude of the source
and the analyzer’s reference level are decreased in 10 dB steps. The analyzer marker
functions are used to measure the amplitude difference between steps. Reference Level
Accuracy is tested in both Log and Linear Scale Modes. Most of the error is contributed
from the output attenuator inaccuracy in the synthesized sweeper and not the analyzer.
Reference Level
Minimum
(dB)
Maximum
(dB)
dBm dBmV
–30 21.76 Reference Reference
–20 31.76 –1.40 1.40
–10 41.76 –1.40 1.40
–40 11.76 –1.40 1.40
–50 1.76 –1.40 1.40
–60 –8.24 –1.40 1.40
–70 –18.24 –2.0 2.0
Item
Critical Specifications
(for this test)
Recommended
Agilent Model
Signal Sources
Synthesized Sweeper Output Level Accuracy
0 to –15 dBm: ±1.0 dB
–16 dBm to –63 dBm: ±1.4 dB
≤ –64 dBm: ≥2.0 dB
8340A/B or 836XX
Series
Adapters
Type-N (m), to
BNC f)
1250-1476
Cables
Type-N, 152-cm
(60-in)
11500D
BNC, 122-cm (48-in) 10503A
Additional Equipment for 75-Ohm Input
Pad, minimum loss 11852B