Tektronix 1730 Series, Инструкция по эксплуатации

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1730–Series Checks and Adjustments
5–37
b. Set multiburst generator to Sweep, High Range, Composite, Markers,
and Full Amplitude.
c. Set the 1730-Series SWEEP to 2FLD and EXT REF.
d. Set the test oscilloscope Vertical Volts/Div to 100 mV.
e. ADJUST – C195 (CH–A Comp.) for flat response at 6 MHz. See Fig.
5-12.
100
80
60
40
20
–20
–40
NTSC
7.5
12.5%
0%
75%
100%
2% & 4% K FACTOR
Tek
6th MARKER
ROLL OFF
Figure 5-12: Adjusting for best flat response.
f. Check the response in the 2–4 MHz region. If it is bumped up:
ADJUST both L180 and L190 in a small amount (both cores should be
adjusted together). If it is dipped: ADJUST both L180 and L190 out a
small amount (both cores should be adjusted together).
g. Repeat parts e. and f. until the best response to 6 MHz is achieved.
C368 (HF Comp) may need to be adjusted slightly (it affects response in
the 6–8 MHz region).
h. Disconnect the multiburst signal from the CH–A INPUT and remove the
75
W
termination from the remaining side of the loop-through connector.