TB 9-6625-1959-24
Figure 1. Main circuit board left side - adjustment locations.
9. Output Buffer Current and Harmonic Suppression
a. Performance Check
(1) Position controls as listed in (a) through (d) below:
(a) FREQUENCY RANGE (MHz) switch to 100-250.
(b) FREQUENCY VARIABLE control for a 100
MHz
display
on
FREQUENCY MHZ indicator.
(c) OUTPUT AMPLITUDE VOLTS P-P control to 5.5.
(d) AMPLITUDE MULTIPLIER switch to X1.
.
(2) Connect TI OUTPUT to spectrum analyzer INPUT 50
(3) Set spectrum analyzer controls as listed in (a) through (e) below:
Preset.
(a)
AMPLITUDE, Ref Level to 20 +dBm.
(b)
AMPLITUDE, Attenuation to 30 dB.
(c)
FREQUENCY, Center Freq to 100 MHz.
(d)
SPAN to 2 MHz.
(e)
(4) Allow the spectrum analyzer to sweep a few times then set spectrum analyzer as
listed in (a) through (e) below:
(a) Peak Search.
(b) Marker , Mkr CF.