HP 85662A Troubleshooting And Repair Manual page 439

Spectrum analyzer if-display section
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Tables 1 through 8 provide information that is useful in troubleshooting the A4A9 IF Control
Assembly.
Table 1. 0.0 to -1.9 dB Control Truth Table
(Levels at Output of Latch U20)*
Table 2.
0 to -9 dB Control Truth Table
(Levels at Output of Latches U18 and U20)*
Table 3. Resolution Bandwidth Truth Table
Option 067 3

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