TB 9-6625-2235-24
8. Calibrator Output Accuracy
a. Performance Check
(1) Connect 280 MHz CAL OUTPUT to INPUT 50Ω.
(2) Center 280 MHz signal on crt with TUNING control and press FREQUENCY
CAL pushbutton.
NOTE
Adjust INPUT ATTEN control (if necessary) for a measurable
signal.
(3) Press in 1 dB/DIV pushbutton and recenter signal on crt with TUNING control.
(4) Position signal peak on top crt graticule line with REFERENCE LEVEL and
REF LEVEL FINE controls.
NOTE
Signal position and amplitude established in (3) and (4) above
will be used as references in (7) below.
(5) Disconnect 280 MHz CAL OUTPUT to INPUT 50Ω and connect equipment as
shown in figure 2 (connection A).
(6) Set variable attenuator to 20 dB.
established in (3) and (4) above.
(8) If power meter indication is not between -9 and -11 dBm, perform b (1) through
(3) below.
NOTE
Variable attenuator and power splitter errors must be included
in (8) above.