TB 9-6625-086-24
Table 4. Range and tracking Performance Check (Without Power Meter Calibrator) - Continued
Test
Multimeter indications (Vdc)
Adjustments (fig. 3)
Test
instrument
200 ohm mount
100 ohm mount
instrument
200 ohm
100 ohm
switch
indication
mount
mount
Min
Max
Min
Max
settings
3
3
7.67
7.83
10.84
11.06
R9
R6
10
10
14.00
14.28
19.80
20.20
R8
R7
10
8
12.52
12.78
17.71
18.07
10
6
10.84
11.06
15.34
15.64
10
4
8.85
9.03
12.52
12.78
10
2
6.26
6.38
8.85
9.03
NOTE
Each time the TI RANGE switch is changed, turn the dc power
supply off and zero the TI meter.
(7)
Repeat the technique in (5) and (6) above for the remaining positions
of the TI RANGE switch. If both the 200 ohm and 100 ohm thermistor mount are
available, perform (1) through (6) above for both mounts.
b. Adjustments. Adjust R1 through R14 (fig. 2) as appropriate.
12. Oscillator Frequency
a. Performance Check
NOTE
Do not perform the oscillator frequency check if all parameters
in paragraphs 8 through 11 above are within tolerance.
(2) Connect the 200-ohm thermistor mount to the TI and terminate the mount with
a 50-ohm termination.
(3) Set the TI MOUNT RES switch to 200 .
(4) If the frequency counter does not indicate between 9.990 and 10.010 kHz,
perform b below.
NOTE
Perform (5) through (7) below if the TI is to be used with a 100-
ohm thermistor mount.
(5) Disconnect the 200 ohm thermistor mount from the TI.
(6) Connect the 100 ohm thermistor mount to the TI and turn the MOUNT RES
switch to 100 .
(7) The frequency counter will indicate between 9.950 and 10.050 kHz.
b. Adjustments. Adjust L2 (fig. 1) for 10.000 kHz.
