Calibration—7D14
CHANNEL A
ADJUSTMENTS
Equipment
Required
1.
Indicator Oscilloscope
8. 10X
probe
2.
Amplifier unit
9.
Five-nanosecond GR cable
3. Time-base unit
10. 50-ohm in-line
termination
4.
Digital
voltmeter
11. GR to BNC male
adapter
5. Square-wave generator
12. 10X
GR attenuator
6.
High-frequency
constant-amplitude sine-wave generator
13.
2X GR attenuator
14.
Tuning tool and inserts
7.
Medium-frequency
constant-amplitude sine-wave
generator
15.
Three-inch screwdriver
Control
Settings
Set
the controls as given
under Preliminary Control
Settings.
Location
of
Adjustments
and Test
Points
The
locations of the Channel A Adjustments
and Test
Points
are
shown in
Fig. 5-2.
1.
Adjust Input
Zero
a.
Set the INPUT SENS control to 50 Ω/100 mV.
b.
Connect
the digital
voltmeter between test point
118
and
chassis
ground.
c. CHECK-Voltmeter reading; zero volt ±0.001 volt.
d. ADJUST—
Zero adjustment
R225 for a voltmeter
reading
of
exactly
zero volt.
2.
Adjust
Trigger
Preset
a.
Change
the following control settings:
Fig.
5-2.
Location of Channel A Adjustments and Test points (on right side of instrument).
5-13
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 ...