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12. Option 857
Amplitude Fidelity
Test
Related Adjustment
Log Amplifier Adjustments
Specification
Log:
Incremental
fO.l dB/dB over 0 to 80
dB
display
Cumulative
3 MHz to 30 Hz Resolution Bandwidth:
54~0.6
dB
max over 0 to 70 dB display (20
-
30°C).
sf1.5
dB
max over 0 to 90 dB display
10 Hz Resolution Bandwidth:
sf0.8
dB
max over 0 to 70 dB display (20
-
30°C).
sk2.1
dB
max over 0 to 90
dB
display
Linear:
&3%
of Reference Level for top
9-l/2
divisions of display
Description
Amplitude fidelity in log and linear modes is tested by decreasing the
signal level to the spectrum analyzer in 10
dB
steps with a calibrated
signal source and measuring the displayed amplitude change with the
analyzer’s MARKER A function.
BNC
TEE
Figure 5-1. Option 857 Amplitude Fidelity Test Setup
5-2 Option 857