TB 9-4931-443-24
e. Position EXCITER controls as listed in (1) through (4) below:
(1) FREQUENCY HZ controls to 100 and MULT switch to X10.
(2) CAL control fully counterclockwise.
(3) ATTENUATOR switch to 2.
(4) VOLTAGE controls to 11111.
f. Position POWER UNIT controls as listed in (1) through (6) below:
(1) ON/RESET-STANDBY switch to STANDBY.
(2) METERING switch to VOLTAGE.
(3) OUTPUT MODE switch to VOLTAGE.
(4) REG ADJ control to 5.
(5) RANGE switch to RANGE I.
(6) ON-LINE switch to ON.
g. Allow at least 2.5 hours for equipment to warm-up and stabilize.
8. Exciter Frequency and Stability
a. Performance Check
(2) Adjust EXCITER UNIT VOLTAGE and ATTENUATOR switches as required
for stable presentation on frequency counter.
(3) Frequency counter will indicate between 990 and 1010 Hz. If not, perform b below.
(4) Repeat technique of (2) and (3) above at test instrument FREQUENCY HZ
switch settings listed in table 3. Frequency counter will indicate within limits specified. If
not, perform b below.
Table 3. Frequency Accuracy
Frequency counter indication (Hz)
Test instrument FREQUENCY
Hz switch positions
Min
Max
999 X1
989
1,009
010 X1
99 msec
101.01 msec
100 X100
9,900
10,100
010 X100
990
1,010
020 X100
1,980
2,020
030 X100
2,970
3,030
040 X100
3,960
4,040
050 X100
4,950
5,050
060 X100
5,940
6,060
070 X100
6,930
7,070
080 X100
7,920
8,080
