Tektronix 310A, Instruction Manual

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Performance Check/Calibration-Type 310A
25. Check Low-Frequency Triggering Operation
a. Change the following control settings:
VO LTS/D IV 0.2
TRIGGER + IN T
Trigger Coupling-Mode AUTO
T IM E /D IV 1 MSEC
b. Connect the low-frequency constant-amplitude sine-
wave generator to the vertical INPUT connector through
the BNC-to-dual binding post adapter, 42-inch 50-ohm BNC
cable, 50-ohm termination and the BNCT connector. Con­
nect the output of the BNC T connector to the EXT TRIG
INPUT binding post with the 18-inch BNC-to-banana plug
patch cord.
c. Set the low-frequency generator for a 0.25-division
display at one kilohertz.
d. CHECK—Stable CRT display can be obtained with
the Trigger Coupling-Mode switch set to AUTO, AC and DC
(TRIG LEVEL control may be adjusted as necessary to
obtain a stable display).
e. Set the TRIGGER switch to + EXT.
f. Set the low-frequency generator for a one-division dis­
play (0.2 volt) at one kilohertz.
g. CHECK—Stable CRT display can be obtained with
the Trigger Coupling-Mode switch set to AUTO, AC and DC
(TRIG LEVEL control may be adjusted as necessary to
obtain a stable display).
h. Set the T IM E /D IV switch to 10 MSEC.
i. Set the low-frequency constant-amplitude generator
for an output frequency of 60 hertz (output amplitude
remains at 0.2 volt).
j. Set the Trigger Coupling-Mode switch to AUTO.
k. CHECK—Stable CRT display is presented.
l
. Set the low-frequency constant-amplitude generator
for an output frequency of 30 hertz (output amplitude
remains at 0.2 volt).
m. CHECK-Stable CRT display can be obtained with
the Trigger Coupling-Mode switch set to AC and DC (TRIG
LEVEL control may be adjusted as necessary to obtain a
stable display).
n. Set the TRIGGER switch to + INT.
o. Set the low-frequency generator for a 0.25-division
display at 30 hertz.
p. CHECK—Stable CRT display can be obtained with
the Trigger Coupling-Mode switch set to AC and DC (TRIG
LEVEL control may be adjusted as necessary to obtain a
stable display).
q. Set the Trigger Coupling-Mode switch to AUTO.
r. Set the low-frequency generator for a 0.25-division
display at 60 hertz.
s. CHECK—Stable CRT display is presented.
26. Check Triggering Slope Operation
a. Set the T IM E /D IV switch to 200 ^SEC.
b. Set the low-frequency generator fo r a four-division
display at one kilohertz.
c. CHECK—CRT display starts on the positive slope of
the waveform.
d. Set the TRIGGER switch to — INT.
e. C H EC K-C R T display starts on the negative slope of
the waveform.
f. Set the TRIGGER switch to + EXT.
g. C H EC K-C R T display starts on the positive slope o f
the waveform.
h. Set the TRIGGER switch to — EXT.
i. C H EC K-C R T display starts on the negative slope o f
the waveform.
j. Disconnect all test equipment.
27. Check Line Triggering Operation
a. Connect the 10X probe to the vertical INPUT con­
nector.
b. Change the following control settings:
VO LTS/DIV 10
TRIGGER + LINE
T IM E /D IV 2 MSEC
c. Connect the probe tip to the same line-voltage source
which is connected to this instrument.
d. CHECK-Stable CRT display triggered on the positive
slope.
e. Set the TRIGGER switch to — LINE.
f. CHECK-Stable CRT display triggered on the negative
slope.
g. Disconnect all test equipment.
28. Check/Adjust Normal Timing
a. Change the follow ing control settings:
5-20