18.Frequency Control Adjustments

22.Key in (ml [CF STEP SIZE) J 1023 Hz.

START and STOP Adjustments

23.Adjust A22 LSD VT0 A22R7 for DVM indication of +0.0218 f0.0001 V dc. If not using an HP 3455A DVM, adjust for specified voltage plus the DVM indication in step 20. See Figure 3-71 for location of adjustment.

24.On the HP 3456A, press INIATH) (ZJ err.

25.Connect frequency counter to rear-panel 1ST LO OUTPUT connector.

26.Press (~NSTR PRESET), then key in ISHIFT) CCF STEP SIZE) J. CRT annotation should indicate DACS 0.

27.Adjust A22 START A22R39 for frequency counter indication of 2.050 GHz f 0.002 GHz. See Figure 3-71 for location of adjustment.

28.Key in ISHIFT) CCF STEP SIZE) J 1023 MHz. CRT annotation should indicate DACS 1023.

29.Adjust A22 STOP A22 STOP A22R35 for frequency counter indication of 3.7891 *0.002 GHz. See Figure 3-71 for location of adjustment.

FM SPAN Adjustment 30. Press (INSTR PRESET), then key in (CENTER FREQUENCY) 10 MHz,

[FREQUENCY SPAN] 20 MHZ.

31.Connect CAL OUTPUT to SIGNAL INPUT 2.

32.Adjust A22 FM SPAN A22R64 so that the LO Feedthrough signal is centered on the left edge graticule and the 20 MHz CAL OUTPUT signal is centered on the right edge graticule. See Figure 3-71 for location of adjustment.

3-122 Adjustments