Tektronix 1L30, Инструкция по эксплуатации

Страница: 12 / 129

^'j j^ o ^ -^»,iktf^3g:tei3iL’yEo >**
Operating Instructions— Type 1130
First Time Operation
Preliminary
a. Set the Sweep Voltage selector at the rear panel [see
Fig. 2-4) Type 1L30 to the correct position (100 V or 150 V)
for the oscilloscope being used. Some Tektronix Type Oscillo­
scopes and their sweep voltage output are listed in Table
2-1 and on the back panel of the instrument. If your oscillo­
scope is not listed, check the specifications given in the
oscilloscope instruction manual for the front panel sawtooth
out signal amplitude.
Fig. 2-4. Rear panel of the Type 1130 showing sawtooth selector.
TABLE 2-1
100 Volt
Sawtooth 1 5 0 V o lt Sawtooth
Internal
Sawtooth
Type 544 All 530 Series
Type 549
Type 546 Type 543
Type 556
Type 547 ■ Type 545 (A and B)
Type 556 Type 549
Type 555
All 580 Series
Type T Time-Base Plug-ln
b. Insert the Type 1L30 into the plug-in compartment and
fasten the securing latch.
c. Turn on the oscilloscope power, connect a patch cord
between the Oscilloscope Sweep output and the Type 1L30
SWEEP INPUT connector. Allow approximately 20 minutes
warm-up period for the instrument operation to stabilize.
d. Set the Type 1L30 and plug-in oscilloscope front panel
controls as follows:
Analyzer Controls
DISPERSION RANGE
DISPERSION-COUPLED
RESOLUTION
IF ATTEN dB
IF CENTER FREQ
M H z /C M
Controls coupled together
and in the lO M H z/c m
position
All switches in OFF
position
Centered (000)
FINE .
Midrange
POS
Centered
VIDEO FILTER OFF
VERTICAL DISPLAY LIN
G A IN . ccw
FINE RF FREQ Centered
INT 1 M H z REF FREQ OFF
MIXER PEAKING Centered
Plug-In Oscilloscope
Time/Cm 5 ms
Triggering Adjusted for a free
running sweep
1. Adjust the Intensity control clockwise until a trace is
visible, then adjust the Focus and Astigmatism controls for
optimum trace definition.
2. Position the trace to the horizontal center and to the
bottom line of the graticule with the Position ’controls.
3. Adjust the Scale Ilium control for the desired grati­
cule illumination.
4. Apply a low amplitude signal (between — 60 and — 30
dBm) from the Signal Generator or other source, preferably,
within the frequency range of the Type 1L30, through a co­
axial cable to the RF INPUT connector.
5. Adjust the G A IN control for a moderate noise level
(0.5 cm) on the display, then tune with RF CENTER FREQ
control through the frequency range. Observe the different
rate and direction of movement (left to right or right to left)
of the signals across the screen when the RF CENTER FREQ
control , is tuned through the frequency of the band.
6. Tune the dial with the RF CENTER control to the fre­
quency of the applied, input RF signal.
7. Adjust the MIXER PEAKING control for optimum sig­
nal amplitudes.
8. Adjust the G A IN an d /o r the IF ATTEN dB swiiches for
a signal amplitude on the display of approximately 4 centi­
meters.
9. Tune the signal to the extreme left graticule line with
the RF CENTER FREQ control. Note the dial reading. Tune
the signal to the extreme right graticule line and pote the
dial reading. The difference between dial readings is the
total dispersion window for this 10 centimeter display. Tune
the signal to the center of the screen and switch the DIS­
PERSION-COUPLED RESOLUTION selector to the 5 M H z
position. Tune the signal across the screen and note the
total dispersion. It should decrease to V
2
the dispersion noted
with the DISPERSION selector in the lO M H z /c m position.
Tune the signal to the center of the screen.
. 10. Tune the IF CENTER FREQ control through its range.
Note that all signals move across the screen in the same
direction and the same amount. This control will shift the
IF center frequency approximately -f- or — 25 M H z with the
DISPERSION controls in this position. Tune the IF CENTER
FREQ control to center the signal on the screen.
11. Change the DISPERSION selector to .5M H z/cm . A d ­
just the FINE IF CENTER FREQ control. Note the frequency