Agilent Technologies 8590L Service Manual page 140

12.Check that the measuring receiver power level reads greater than
+12 dBm.
13.Disconnect the power sensor from LO OUTPUT, then reconnect the
50 Ω termination to LO OUTPUT.
14.Disconnect the DMM leads from A10TP4 and A10TP2.
Chapter 2
22. First LO Distribution Amplifier for Option 009 or 010
Making Adjustments
141