Specifications

4-2 Chapter 4

Appendix

DANL Manual Performance Verification

The Displayed Average Noise Level manual performance verification measures the

preamp “off” DANL of Option H26. The test measures the noise in zero span with a 1 kHz

resolution bandwidth, and then normalizes the amplitude to a 1 Hz bandwidth.

DANL is defined as the average of the displayed trace. There is no practical method for

manually reading the average of the trace. This procedure averages the trace 100 times

and then the operator scrolls the display line to the middle of the trace. The display line

reading is considered the trace average. The reading is normalized to a 1 Hz RBW by

subtracting 30 dB (10 × Log(1000)) from the display line value.

Table 4-7 on page 4-7 directs the user to a specific Test Record for that instrument. Table

4-8 on page 4-8 is provided for traceability of the instruments used in the testing.

Procedure

1. Connect the appropriate termination to the PSA RF input connector.

Press [System] > Alignments > Align All Now.

2. Press Preset. Set the analyzer controls by pressing the following keys:

3. Press [AMPLITUDE] > More 1 of 3 > In Preamp > On. (This is the lowband preamp.)

4. Press [FREQUENCY] and enter the first frequency listed in Table 4-1 on page 4-3.

SPAN, Span, 0 Hz

Sweep, Sweep Time, 20 ms

Amplitude, Ref Level, -100 dBm

Amplitude, Attenuation, Man, 0 dB

BW/AVG, Res BW, 1 kHz

BW/AVG, Average, On

Single