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Using the PNA E836xC front panel Port 1 Source Out as the LO input for the 85309: We know that for a mixer, IF= N(LO) – RF where N = external mixer harmonic number Since IF = 8.33 MHz, then 8.33 = N(LO) – RF LO (MHz) = (RF + 8.33)/N To set the LO frequency of the 85309, simply set the RF output on the PNA to the LO frequency calculated above. Turning on Option H11 with PNA and PNA-X Although Option H11 is installed, you must assure that the IF switch is set correctly for it to function properly. For PNA: Select Channel > Advanced > IF Switch Configuration Then Select External for both IF Inputs For PNA-X: Select Channel > Hardware Setup > If Switch Config Figure 26. Enabling external IF inputs. 34
