TB 9-6625-160-24
(25) Set CALIBRATOR output to STBY. Remove short from TI INPUT HIGH
connector. Move cable and 50 Ω feedthrough termination from TI INPUT LOW connector
to TI INPUT HIGH connector. Set TI INPUT FLOAT switch to ground.
(26) Set TI RATIO to off (Led off).
(27) Set CALIBRATOR for -34 dBm at 20 Hz. Then adjust CALIBRATOR output for
a 7 mV (as close as possible) indication on TI.
(28) Set TI RATIO button to on (Led on).
(29) Using CALIBRATOR controls, decrease signal of CALIBRATOR by 26 dBm.
(-34dBm 26dBm = 60dBm)
(30) Record % reading on TI right display in indicated column of table 10 below.
% Recorded in step
above Equ.ivalent V Hz % recorded in step
above
C/R =
(31) Calculate computed ratio (C/R) using following formula:
%
(32) Record C/R in appropriate column of table 10 below. C/R must be within
corresponding limits specified.
(33) Repeat technique of (26) through (32) above for remaining parameters and
limits listed in table 10 below.
Table 10. AC Level Accuracy and Flatness (0.0007 V HIGH INPUT).
Right display
TI computed ratio (C/R) (%)1
Calibrator
Table 7 reading
reading
Indicated
Calculated
Frequency (Hz)
(%)
Indicated (%)
Min
(C/R) (%)
Max
step (30)
step (32)
20
96
104
1k
96
104
20 k
96
104
50 k
96
104
100 k
96
104
1
These percentages will be used on table 11 below.
(34) Set CALIBRATOR output to STBY.
(35) Disconnect test setup.
(36) Connect TI OUTPUT HIGH connector to TI INPUT HIGH connector. Set
IMPEDANCE to 50 Ω. Set INPUT and OUTPUT FLOAT switches to ground.
(37) Set TI RATIO button to off (Led off). Set TI controls for first values listed in TI
special function, source AMPT and frequency columns of table 11 below.
(38) Key in source amplitude numerical value as reference and set TI RATIO to on
(Led on). (See Note below.) Record TI right display indication in appropriate column of
table 11 below.
NOTE
Key in the Numerical value only. Do NOT press the V or mV
button. Key in value as shown in table 11.
(39) Divide TI right display by corresponding V/Hz RATIO recorded in step (10)
(table 7) or step (26) (table 10) as applicable, and then multiply result by 100.
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