Calibration
—7D14
TABLE 5-1
MEASUREMENT
INTERVAL
Readout Limits
Minimum
Maximum
1 ms
499.999 MHz
500.001
MHz
10 ms
499.9999
MHz
500.0001
MHz
100
ms
499.99999
MHz
500.00001
MHz
1
s
99999^.999
kHz
00000.001
kHz
10s
9999.9999
kHz
0000.0001
kHz
9.
Check
Channel
B
Frequency
Range
and
Sensitivity
a.
Change the
following control settings:
7D14
MEASUREMENT INTERVAL
1
s
INPUT SENS
50Ω/100mV
BW
5
MHz
b. Connect
the
time-mark generator marker output to
the 7D14 CH A INPUT
through the 42-inch
BNC cable.
c. Set
the
time-mark generator
for one-millisecond
markers.
d.
Connect
the low-frequency constant-amplitude
gen
erator
to
the
REF
FREQ/CH
B EXT IN connector through
the 42-inch BNC cable,
50-ohm
BNC termination, BNC T
connector, and
BSM
to
BNC female
adapter. Connect the
output of the
BNC T connector to the amplifier unit input
through the 18-inch
BNC cable.
e. Set the
amplifier unit for a vertical
deflection factor
of
0.2
volt/division and the time-base unit for a sweep rate
of 0.2
µs/division with internal triggering.
f.
Set the
low-frequency
generator for a four-division
display at
two
megahertz.
g.
CHECK
—The
GATE indicator
light should blink on
and
off, and the readout display should show a count of
about 0.500 MHz.
i. Set
the time-base
unit for a sweep rate of 0.5 second/
division.
j.
Set the
low-frequency
generator for a four-division
display (0.8 volt) at
10 hertz.
k. Press
the
RESET button
to turn off the GATE indi
cator and reset
the
readout display to zero count.
l.
CHECK—Release the
RESET button; the GATE indi
cator
should light
and remain on for
about one and one-half
minutes.
m.
CHECK
—
Readout
display for a count of about
100.000
MHz.
n.
Disconnect
all test equipment.
10.
Check
External
Gate
a.
Change
the following control settings.
7D14
MEASUREMENT INTERVAL
MANUAL GATE OFF
REF
FREQ/CH B
INT 1
MHz
BW
525
MHz
DISPLAY TIME
0.1 s (counterclockwise)
b.
Connect
the
pulse generator (Type 115) output to
the
amplifier unit input through the 42-inch
BNC cable
and
50-ohm BNC termination.
c. Set the pulse generator controls
as follows:
Period
Width
Risetime
and
Falltime
Mode
Trigger
Pulse Polarity
DC Offset
Amplitude
100 ns
50
ns
10 ns
Undly'd
Pulse
I
nt
+
Preset
1.0
h.
Change
the following control settings:
7D14
MEASUREMENT INTERVAL
1
ms
DISPLAY TIME
°°
(infinite)
d.
Set the
pulse generator variable amplitude control for
a
three-division display.
e.
Set the pulse generator
variable
period control for a
seven-division pulse
period.
5-9
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 ...