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Performance Verification
2715 Spectrum Analyzer Service Manual
4-17
3rd Order IM performance requirement is ≤70 dBc.
H Test equipment required:
Signal Generators (2)
20 dB Pads (2)
BNC T Adapter
1. Recall default power up settings by pressing UTIL 1 1.
2. Connect the test equipment as shown in Figure 4 --1.
RF Output
20 dB Pads
BNC T Adapter
Signal Generator Signal Generator
2715 Spectrum Analyzer
*
*
Use min-loss pad for
75 Ω input
Figure 4- 1: 3rd Order IM Test Setup (25 MHz Separation)
3. Select the following settings on the Spectrum Analyzer:
FREQUENCY 200 MHz
REFERENCE LEVEL --30 dBm
SPAN/DIV 10 MHz
RESOLUTION BW 30 kHz
VERTICAL SCALE 1 dB/
4. Set the VIDEO FILTER to 3 kHz by pressing UTIL251.
5. Set the first generator for a 200 MHz, full screen signal.
6. Set the second generator for a 225 MHz, full screen signal.
7. Reset the VERTICAL SCALE to 10 dB.
8. Check that the 3rd Order IM product is ≤--70 dBc.
9. Reset the VERTICAL SCALE to 1 dB and FREQ SPAN/DIV to 500 kHz.
10. Reset the second generator output frequency for a 201 MHz, full screen
signal.
Intermodulation
Products (IM)