Performance Verification
2715 Spectrum Analyzer Service Manual 4-9
5. When the sweep oscillatorhas finished its sweep, press MKR/∆/OFF to
activate the marker.
6. Press MKR/∆/OFF again to activate the deltamarker and tune it to the
highest and lowest points on the response curve. Note the amplitude at both
markers.
7. Check the delta marker amplitudes as follows:
HAll instruments except Optio n 50 and Option 75 - not to exceed ±2dB.
HOption 50 and Option 75 inst ruments - not to exceed ±2 dB from 9 KHz
to 1.8 GHz, not to exceed ±3 dB from 1.8 GHz to 2.15 GHz.
Verifyproper marker operation with the following procedure:
1. Recall default power up settings by pressing UTIL 1 1.
2. Select the following settings on the SpectrumAnalyzer:
FREQUENCY 500 MHz
REFERENCE LEVEL --10 dB m
SPAN/DIV 100 MHz
RESOLUTION BW 300 kHz
VID FLTR On
VERTICAL SCALE 10 dB/
3. Enable the calibrator by pressing INPUT 9. The instrumentshould display a
series of 100 MHz marks of varying amplitudes.
4. Press PEAK FIND. The markershould go to the highest signal, and the
readout should display that signal’sfrequency and amplitude. Frequency and
amplitude readouts are preceded by the letter M.
5. Press MKR [']and note that themarker moves to the next signal to the
right and the readouts are updated. Continue pressing MKR and observe the
marker position and readouts. Themarker will only recognize those signals
whose amplitude is above a preset or default threshold level, and will not
recognize apparentsignals ≤0 H z. The threshold level is set via MKR/
FREQ 0.
6. Repeat step 5 using the MKR [a]button.
7. Press MKR/∆/OFF once. The readouts should now be preceded by the letter
D and should read 0.
8. Tune the FREQ/MKRS control and note that a second marker appears. The
marker readout should now displayfrequency and amplitude differences
between the two markers.
Marker Operation