TB 9-6625-2020-24
(2) Connect calibrator OUTPUT HI and LO to TI INPUT HI and LO.
(3) Set TI range/function switch to AC VOLTS - 20 dB and press dB/OUT: NORM
pushbutton in to dB.
(4) Set calibrator for a 77.46 mV, 1 kHz output. If TI does not indicate between -
0.5 and +0.5, perform b (1) below.
(5) Set calibrator for 8.69 mV, 1 kHz output. If TI does not indicate between -18.5
and -19.5, perform b (2) below.
(6) Set calibrator for a 690.36 mV, 1 kHz output. TI will indicate between +18.5
and +19.5.
(7) Position TI dBm/dBV jumper (fig. 1) in dBV position.
(8) Set TI range/function switch and calibrator output for settings listed in table 7.
TI indications will be within limits specified.
Table 7. Ac Decibels
Test instrument
Calibrator output settings
Test instrument
range/function switch
indications
Voltage
settings (AC VOLTS dB)
Min
Max
-40
10
mV
1
kHz
-0.5
+0.5
-20
100
mV
50
Hz
-0.5
+0.5
0
200
mV
7
kHz
-12.98
-14.98
0
200
mV
20
kHz
-11.98
-15.98
0
1
V
1
kHz
-0.5
+0.5
0
1.05925 V
20
kHz
0.0
+1.0
0
3
V
15
kHz
+9.04
+10.04
0
9
V
50
Hz
+18.58
+19.58
20
90
V
7
kHz
+18.58
+19.58
40
90
V
20
kHz
-1.91
+0.09
40
472.029
V
20
kHz
+12.98
+13.98
(9) Release TI dB/OUT: NORM pushbutton to OUT: NORM.
b. Adjustments
(1) Adjust R205 (fig. 1) until TI indicates 0.00 (R).
(2) Adjust R215 (fig. 1) until TI indicates -19.00 (R).
13. Final Procedure
a. Deenergize and disconnect all equipment
b. Annotate and affix DA label/form in accordance with TB 750-25.
