5. DC Log Amplifier Adjustments
7.Reduce the input power by 40 dB, to -58 dBm ( use an attenuator or a source with a good relative amplitude accuracy).
8.If the signal is lower on the screen than expected (delta marker reads a change of greater than 40 dB, such as -4ldB) then adjust A4R544 ( see Figure 2-7) for an even lower level and press LCAL), ADJ CURR IF STATE . Allow sufficient time for the analyzer to complete the adjustment.
9.If the signal is higher on the screen than expected (delta marker reads a change of less than 40 dB, such as reads -39 dB) then adjust A4R544 for an even higher level signal and press LCAL), ADJ CURR IF STATE . Allow sufficient time for the analyzer to complete the adjustment.
10.Repeat the adjustment and adjust current state until the delta marker reads -40 dB f2 dB.
Adjustment Procedures 2-31
