TB 9-6625-1957-24
18. Ac dBm/dBV
a. Performance Check
(1) If necessary place dBm/dBV jumper J1435 P1435 (fig. 2) in dBm position.
(2) Press TI dB and 20 dB pushbuttons (in).
(3) Set calibrator for an output of 20 dBm at an output frequency of 10 kHz. If TI
does not indicate within limits specified in first row of table 9, perform corresponding
adjustment as listed in table 9.
(4) Repeat technique of (2) and (3) above, using outputs and settings listed in
adjustment as listed in table 9.
NOTE
In the following table, interaction may occur in the
adjustments of R1535 and R1528. Also, a flashing display with
the upper segment of the 1 in the most significant digit
followed by a "+" or " ", indicates upper or lower limits of
range.
Table 9. Ac dBm
Calibrator
Test instrument
output
indications
Adjustments
Range
setting
Min
Max
dBm
20 dBm
20 dB
0.5 dB
10 kHz
+0.5 dB
dB R1535
20 dB
0.0 dBm
10 kHz
+19.5 dB
+20.5 dB
dB GAIN R1528
40 dBm
20 dB
21.5 dB
18.5 dB
10 kHz
---
40 dBm
40 dB
0.5 dB
1 kHz
+0.5 dB
---
+10 dBm
20 Hz
0 dB
+9.5 dB
+10.5 dB
---
+10 dBm
20 kHz
0 dB
+9.5 dB
+10.5 dB
---
17 dBm
17.5 dB
16.5 dB
1 kHz
0 dB
---
17 dBm
18.5 dB
15.5 dB
5 kHz
0 dB
---
+22 dBm
1 kHz
+20 dB
+1.5 dB
+2.5 dB
---
+45 dBm
1 kHz
+40 dB
+4.5 dB
+5.5 dB
---
(5) Reduce calibrator output to minimum.
b. Adjustments. No other adjustments can be made.
19. Dc Current
a. Performance Check
(1) Connect calibrator OUTPUT HI to TI mA input and calibrator OUTPUT LO to
TI LOW input.
(2) Press TI pushbuttons as listed in (a) and (b) below:
(a) mA DC (in).
(b) 200 A range (in).
(3) Set calibrator for an output of 190 A. TI will indicate within limits specified in
first row of table 10.