TB 9-6625-1914-35
(7) SCAN MODE switch to MAN (not on all models).
(8
SCAN TRIGGER switch to AUTO.
(9) MANUAL SCAN control to midrange (not on all models).
h. Adjust display section FOCUS and ASTIGMATISM controls for smallest round
spot display possible.
i. Set SCAN MODE switch to INT (not on all models) and SCAN TIME PER
DIVISION switch to 1 ms (2 ms on Model 8552B).
j. Adjust display section TRACE ALIGN control until horizontal base line trace is
exactly parallel to horizontal graticule lines.
k. Position TI controls as listed in (1) through (5) below:
(1) DISPLAY ADJUST VERTICAL POSITION control adjusted to place trace on
bottom horizontal graticule line.
(2) LOG REF LEVEL switch to 0 dBm.
(3) DISPLAY ADJUST HORIZONTAL POSITION control adjusted to center
trace on display.
(4) DISPLAY ADJUST HORIZONTAL GAIN control adjusted for a 10-division
SCAN WIDTH display.
NOTE
DISPLAY ADJUST HORIZONTAL POSITION and
DISPLAY ADJUST HORIZONTAL GAIN controls interact.
Adjustment of one may necessitate readjustment of the other.
(5) Repeat k (1) above.
l. Connect RF plug-in RF INPUT to TI CAL OUTPUT, using cable (and adapter for
Model 8554B). Display section will indicate as shown in figure 1.
m. Position RF plug-in controls as listed in (1) through (5) below:
(1) Model 8553( ) only: FREQUENCY control adjusted to position inverted marker
under CAL OUTPUT 30 MHZ marker (fig. 1).
(2) SCAN WIDTH PER DIVISION switch to 0.05 MHz (50 kHz on Model 8554B).
(3) BANDWIDTH switch to 10 kHz.
(4) SCAN WIDTH (red) switch to PER DIVISION.
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