TB 9-6625-2317-50
15. AF Accuracy
a
Performance Check
(1) Connect equipment as shown in figure 7.
Figure 7. AF accuracy.
(2) Set calibrator WIDEBAND output to 1 kHz at 114.5 mV.
(3) Set frequency counter to FREQ A with a 50Ω impedance.
(4) Press TI pushbuttons (on) as indicated in (a) through (c) below:
(a) LEVEL DISPLAY FM.
(b) LOW PASS FILTER 75 kHz.
(c) FREQ DISP AF.
(5) Frequency counter display will indicate between 999 to 1001 Hz.
(6) Set calibrator WIDEBAND output to 4 kHz.
(7) Frequency counter display will indicate between 3990 to 4010 Hz.
(8) Press calibrator OPR/STBY pushbutton to STBY.
b. Adjustments. No adjustments can be made.
16. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
13/(14 Blank)
