TB 9-6625-2170-24
(3) Set calibrator for a 774.6 mV, 1 kHz output. If TI does not indicate between
-
00.3 and +00.3 dBm, perform b (1) through (11) below.
(4) Repeat technique of (3) above using settings listed in table 5. If TI does not
indicate within limits specified, perform b (1) through (11) below.
Table 5. dBm
Test instrument indications
Calibrator settings
(dBm)
Amplitude
(kHz)
(mV)
Min
Max
1
244.95
-09.7
-10.3
1
77.46
-19.7
-20.3
1
24.495
-29.7
-30.3
1
7.746
-39.7
-40.3
(5) Set calibrator for a 774.6 mV, 1 kHz output.
(6) Press FUNCTION dB RATIO pushbutton and press and release PUSH TO
SET 0 dB REF pushbutton. If TI does not indicate between -00.3 and +00.3 dB, perform b
(12) through (15) below.
(7) Set calibrator frequency to 10 Hz. If TI does not indicate between -00.5 and
+00.5 dB, perform b (12) through (15) below.
(8) Repeat technique of (7) above using settings listed in table 6. If TI does not
indicate within limits specified, perform b (12) through (15) below.
Table 6. dB Ratio
Calibrator
Test instrument indications
frequency
(dB)
settings
Min
Max
20
Hz
-00.3
+00.3
20
kHz
-00.3
+00.3
100
kHz
-00.5
+00.5
(9) Set calibrator for a 100 V, 1 kHz output.
(10) Press and release PUSH TO SET 0 dB REF pushbutton.
(11) Set calibrator amplitude to 1 mV. TI will indicate between -99.3 and -100.7 dB.
b. Adjustments
(1) Set INPUT RANGE switch to 2V.
(2) Set calibrator for a 774.6 mV, 1 kHz output.
(3) Adjust 0 dB CAL (fig. 3) until TI indicates 00.0 dBm (R).
(4) Set calibrator amplitude to 77.46 mV.
(5) Adjust R2161 (fig. 1) until TI indicates -20.0 dBm (R).
(6) Set calibrator amplitude to 7.746 mV.
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