TB 9-4920-360-24
SIGNAL GENERATOR BOARD
R10
TP1
R32
R40 R42
A5
A4
Figure 1. Test instrument - rear view.
9. Percent Rpm
a. Performance Check
(1) Set POWER switch to OFF.
(2) Connect frequency counter positive to pin A and negative to pin B of SIGNAL
OUTPUT (J2).
(3) Set POWER switch to ON.
(4) Set FUNCTION SWITCH to 5%.
Frequency counter will indicate between
4.058 and 4.175 ms.
(5) Set FUNCTION SWITCH and FREQ switch to settings listed in table 4.
Frequency counter will indicate within limits specified.