TB 9-6625-2170-35
(7) Adjust -40 dB CAL (fig. 3) until TI indicates -40.0 dBm (R).
(8) Repeat (2) through (7) above for best in-tolerance condition.
(9) Set INPUT RANGE switch to 20 mV.
(10) Set calibrator amplitude to 7.746 mV.
(11) Adjust OFFSET (fig. 3) until TI indicates -40.0 dBm (R).
(12) Set INPUT RANGE switch to 2 V.
(13) Set calibrator for a 774.6 mV, 1 kHz output.
(14) Press FUNCTION dB RATIO and press and release PUSH TO SET 0 dB
REF pushbutton.
NOTE
Press and release PUSH TO SET 0 dB REF pushbutton after
each increment adjustment of dBR ZERO.
(15) Adjust dBR ZERO (fig. 3) in increments until TI displays 0.00 dB (R).
a. Performance Check
(1) Connect calibrator OUTPUT HI and LO to TI INPUT + and -.
(2) Position controls as listed in (a) through (d) below:
(a)
INPUT RANGE switch to AUTO RANGE.
(b)
FUNCTION dB RATIO pushbutton pressed.
(c)
FUNCTION LEVEL pushbutton pressed.
(d)
All FILTERS pushbuttons released.
(3) Set calibrator for a 1 V, 1 kHz output.
(4) Press and release FUNCTION PUSH TO SET 0 dB REF pushbutton.
(5) Increase calibrator frequency until TI indicates -3.0 dB. Calibrator frequency
will be ≥ 300 kHz.
(6) Press FILTERS 400 Hz HI PASS pushbutton.
(7) Decrease calibrator frequency until TI indicates -3.0 dB. Calibrator frequency
will be between 380 and 420 Hz.
(8) Set calibrator frequency to 60 Hz. TI indication will be ≤ -40 dB.
(9) Release FILTERS 400 Hz HI PASS pushbutton and press FILTERS 80 kHz
LO PASS pushbutton.
(10) Increase calibrator frequency until TI indicates -3.0 dB. Calibrator frequency
will be between 76 and 84 kHz.
