Calibration
—
7D14
MEASUREMENT
INTERVAL
CHECK
Equipment
Required
1.
Indicator Oscilloscope
8. 42-inch BNC cable (two required)
2.
Amplifier unit
9.
18-inch
BNC cable
3.
Time-base
unit
10. 50-ohm BNC in-line termination (two required)
4.
Frequency standard
11. BSM to BNC female adapter
5.
Low-frequency
constant-amplitude sine-wave generator
12.
Pin-jack cable
6.
Time-mark generator
13.
BNC T connector
7.
Pulse generator
Control
Settings
Set
the controls as given under
Preliminary Control Set
tings.
7.
Check
Internal
Crystal
Oscillator Accuracy
a.
Connect the
7D14
REF FREQ/CH B MONITOR
connector
to
the
amplifier unit
input through the BSM to
BNC female adapter, 18-inch BNC
cable, and 50-ohm BNC
termination.
b.
Connect
the marker output of the time-mark gener
ator
to the Indicator
Oscilloscope high-sensitivity Z-axis
input
through the 42-inch BNC cable and 50-ohm BNC
termination.
c. Set the time-mark
generator for one-second markers.
d.
Connect the frequency
standard
one-megahertz
out
put
to the time-base
unit external
trigger input connector.
e.
Set
the
time-base unit for a sweep rate of .5
µs/
division
externally triggered on the frequency-standard
signal.
f.
Set
the Indicator Oscilloscope intensity control as
necessary
to observe
the one-second intensity modulation
of the CRT display.
g.
CHECK—CRT display;
the
movement of the INT 1
MHz
markers across the CRT should not exceed one divi
sion in one second.
h.
CALIBRATION—See
step 6
of the Adjustment
pro
cedure.
i.
Disconnect all test equipment.
8.
Check
Internal
Gate
Range
a.
Change the
following control settings:
7D14
MEASUREMENT INTERVAL
1ms
REF
FREQ/CH B
EXTIN
INPUT SENS
50Ω/1V
COUPLING
AC
b.
Connect
the
marker output of the time-mark gener
ator
to
the 7D14 CH
A INPUT through the 42-inch BNC
cable.
c. Connect the trigger output of the time-mark gener
ator
to the
REF-FREQ/CH B
EXT IN connector through
the
42-inch
BNC cable, 50-ohm
BNC termination, and BSM
to BNC female
adapter, in given order.
d. Set
the time-mark generator for two-nanosecond
markers
and one microsecond triggers.
e.
CHECK—Sequentially
press the
MEASUREMENT
INTERVAL
1 ms through 10 s buttons, and check the
readout
display
for a
count within the limits given in Table
5-1
for each button pressed.
f.
Disconnect
all test equipment.
5-8
Summary of Contents for 7D14
Page 4: ...7D14 ...
Page 11: ...Operating Instructions 7D14 Fig 2 1 7D14 front panel controls and connectors 2 2 ...
Page 33: ... 3 13 Fig 3 11 Logic diagram for Zero Cancel Logic stage Circuit Description 7D14 ...
Page 38: ...3 18 Fig 3 16 Time Base and Control circuit detailed block diagram Circuit Description 7D14 ...
Page 44: ...NOTES ...
Page 46: ...NJ Fig 4 1 Electrode configuration for semiconductors in this instrument I ...
Page 68: ...NOTES ...
Page 96: ... 7DI 4 DIGITAL COUNTER UNIT ...
Page 98: ...GRS 0371 BLOCK DIAGRAM ...
Page 99: ......
Page 103: ...0 0 I 200 mV 500 µs 0 001 200 mV 500 µs 0 001 MHz 00 mV E 00 µs 0 001 MHz ...
Page 106: ...1 ...
Page 110: ...A2 Logic Circuit Board Assembly jQ798i 798 jc743 CR744t uni R724 R742 JL744S FrR796 ...
Page 113: ......
Page 114: ...P 0 A2 LOGIC BOARD ...
Page 121: ... A B D t F H J NPR Tj ZWX V A AC M AEA HUM qAZ DEF HJ N P R S T J V V7X y ABM APAI AA 7DI4 ...
Page 129: ......
Page 130: ...4 7D14 DIGITAL COUNTER ...