Tektronix P6042 PROBE, Инструкция по эксплуатации

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Performance
Check—Type P6042
k. Change CURRENT/DIV to 2 mA and check for 2.5
centimeters of deflection.
7. Check Noise
a. Connect the two GR 10X 50 Ω attenuators and the
current loop
to the square-wave generator Hi Amplitude
output. Connect the probe to the current loop.
b. Set the CURRENT/DIV switch to 1 mA, Time/cm to
.1 ms, Triggering Mode to Trig, and Stability clockwise to
display two free-running traces.
c. Reduce the square-wave generator Amplitude until the
two traces just merge (the point at which the dark band
between the traces just disappears). See Fig. 5-3B.
d. Switch CURRENT/DIV to 10 mA and remove the two
10X attenuators. Connect current loop and probe to the
square-wave generator output.
e. Check the amplitude of the display for 5 cm ( ≤0.5
mA + 0.2 cm, tangentially measured). See Fig. 5-3C.
f. Remove the probe from the square-wave generator
output and place in the holder (lock the slider).
8. Check Random Trace Shift
a. Set CURRENT/DIV to 1 mA, degauss the probe, and
center the trace with the CURRENT/DIV BALANCE.
b. Set the controls as follows:
Fig. 5-4. Maximum random trace shift at 5 sec/cm, stored.
Time-Base Plug-In
Horiz Display A
Mag On
Time/cm .2 µ s
Trig Mode Auto
Slope
+
Coupling
AC
Source Int
Storage Oscilloscope
Upper Screen Storage
Lower Screen Storage
Norm - Single Sweep
Triggering Mode
Store
Store
Single
Sweep
Auto
Selectable Bandwidth Plug-In
Low Freq 3 dB Point .1
High Freq 3 dB Point 100
c. Push Erase and Reset button several times while adjust­
ing
Intensity so that the brightness of the trace is at mini­
mum storage level.
d. Set Time/cm to 5 sec and push Erase and Reset button.
e. Check stored display for ≤1.5 centimeters peak to peak.
See Fig. 5-4.
b. Connect the cable from the P6042 OUTPUT to the DC
to 100 MHz test oscilloscope Ch 1 Input, terminated in 50
ohms.
c. Remove the current loop from the square-wave genera­
tor and connect to the pulse generator output. Connect the
probe to the current loop. Connect the delay cable to the
pulse generator charge line connectors, using the two lengths
of RG-8A/U.
d. Set the pulse generator Voltage Range to 5.0, Pulse
Polarity to — and turn power on.
e. Adjust pulse generator Amplitude and test oscilloscope
Trig Level to obtain a 4-centimeter display. (Use the viewing
hood if necessary).
f. Check aberrations for <3%, peak to peak. Remove the
probe from the pulse generator and place in the holder.
Turn X10 Mag off.
9. Check Aberrations
a. Turn the DC to 100 MHz test oscilloscope on and set
the controls as follows:
Mode
Trigger
Volts/cm
Variable
Input Coupling
Position
Vertical Plug-In
Ch 1
Norm
.2
Cal
DC
Trace centered
10. Check AC Dynamic Range
a. Connect the current loop to the constant amplitude
signal generator output.
b. Set
the controls as follows:
DC to 100 MHz Test Oscilloscope
Volts/cm
Time/cm
Input Coupling
Vertical Position
.5
20
µs
Gnd
trace centered
5-4