TB 9-6625-2215-35
(3) Adjust autotransformer output from 105 to 125 V while monitoring frequency
counter indication. Frequency will not change by more than 0.5 Hz.
(4) Adjust autotransformer output for 115 V.
b. Adjustments. No further adjustments can be made.
22. Sensitivity
a. Performance Check
(1) Press 80 MHz RANGE and 10 Hz RESOLUTION pushbuttons and release
CHK pushbutton.
(2) Connect function/arbitrary generator output to TI 80 MHz jack, using
termination.
(3) Adjust function/arbitrary generator frequency for 50 Hz and slowly increase
amplitude until measuring system indicates a stable count of applied frequency.
Function/arbitrary generator output will not exceed 50 mV.
(4) Repeat technique of (3) above at function/arbitrary generator frequencies of 100
Hz; 1, 10, and 100 kHz; and at 1 and 10 MHz. Output amplitude of function/arbitrary
generator at each frequency will not exceed 25 mV.
NOTE
Press 100 Hz RESOLUTION pushbutton for frequencies
above 100 Hz.
(5) Remove signal input from 80 MHz jack and connect to 525 MHz jack without
termination; press 525 MHz RANGE pushbutton.
(6) Adjust function/arbitrary generator frequency for 10 Hz and slowly increase
amplitude until measuring system indicates a stable count of applied frequency.
Function/arbitrary generator output will not exceed 100 mV.
(7) Repeat technique of (6) above at frequencies of 100 Hz; 1, 10, and 100 kHz; and
at 1 and 10 MHz. If function/arbitrary generator output exceeds 100 mV, perform b below.
(8) Substitute signal generator for function/arbitrary generator.
(9) Press 1 kHz RESOLUTION pushbutton in and repeat technique of (6) above at
signal generator frequencies of 100 and 500 MHz. If signal generator output exceeds 100
mV and no adjustments were previously made, perform b (2) through (5) below.
(10) Remove signal input from 525 MHz jack and press 80 MHz RANGE
pushbutton.
(11) Connect function/arbitrary generator output to TI 80 MHz jack, using
termination.
(12) Adjust function/arbitrary generator frequency for 25 MHz and slowly increase
amplitude until measuring system indicates a stable count of applied frequency. Signal
generator amplitude will not exceed 25 mV.
