Low Band Mixer Spurs - Agilent Technologies 83620A Service Manual

Table 2-13. Low Band purious ignals
Spectrum Analyzer Frequency
Low Band Mixer purs
17. On the synthesizer, press:
CW 1.6 GHz
5 5 5
18. On the spectrum analyzer, set:
tart Frequency:
top Frequency:
Reference Level:
Resolution Bandwidth: 300 kHz
Video Bandwidth:
weep Time:
cale Log:
Marker:
19. Set the synthesizer to CW 1.9999 GHz and tune from 1.9999 GHz to
1.8 GHz. his results in the most dominant mixing spur moving from
1.4 to 1.8 GHz. he spur should be at the left-hand edge of the display
(1.4 GHz). It should then travel to the right as you tune down. If you
can't see it, increase power until you can identify the spur. hen reset the
power level to 0 dBm (the performance speci cation is valid for 0 dBm).
You are nished tuning when the spur merges with the 2 GHz carrier.
20. Identify the worst point (where the spur has the greatest power level), or if
the spur is lost in the noise oor use that value, and record the di erence
between the reference level and spurious signal amplitude on the test
record.
2-54 Performance Tests
purious ignals (Non-Harmonic)
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100 MHz 100 MHz Fixed Spur
900 MHz 100 MHz O set Spur
6.4 GHz LO Feedthrough Spur
1.4 GHz
1.8 GHz
0 dBm
100 kHz
Auto
10 dB/Division
Normal Peak earch MKR-->REF LVL
Spur
HP 8360