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Performance Verification
4-10
2715 Spectrum Analyzer Service Manual
9. Use the following procedure to check Center Measure/Counter Resolution
Counter Resolution selectable. Performance requirement is 1 Hz or 1 kHz
a. Recall default power up settings by pressing UTIL 1 1. Select the
following settings on the Spectrum Analyzer:
FREQUENCY 100 MHz
REFERENCE LEVEL --20 dBm
SPAN/DIV 100 kHz
RESOLUTION BW AUTO
VID FLTR Off
VERTICAL SCALE 5 dB/
b. Enable the calibrator by pressing INPUT 9.
c. Tune the signal approximately three divisions to one side of the center of
the screen.
d. Select a counter resolution of 1 Hz by pressing MKR/FREQ911.
Press CTR-MEAS/TRKG.
e. Check that the signal is moved to center screen, frequency and amplitude
readouts are preceded by the letter C, and the frequency readout is
displayed to six decimal places.
f. Select a readout resolution of 1 kHz, and press CTR-MEAS/TRKG.
g. Check that the signal frequency readout is displayed to three decimal
places.
Performance requirements are:
10 dB/: ±1.0 dB/10 dB to a maximum cumulative error of ±2.0 dB over the
70 dB range and a maximum cumulative error of ±4.0 dB over the 80 dB range
5dB/:±1.0 dB/10 dB to a maximum cumulative error of ±2.0 dB over the 40 dB
range
1 dB/: +1 dB maximum error over the 8 dB range
Linear: ±5% of full scale
H Test equipment required:
Signal Generator
10 dB and 1 dB S tep Attenuators
Display Dynamic
Range Accuracy