Tektronix 7D14, Instruction Manual

Page: 54 / 133

Calibration — 7D 14
PART l-PERFORMANCE CHECK
Introduction Output Signals Checks
The following procedure checks the performance of the
7D14 without removing the side shields or making internal
adjustments. All tolerances given in this procedure are
based on Section 1 of this manual.
Index to Part I — Performance Check
Channel A Checks
1. Check CH A INPUT Frequency Range Page 5-5
2. Check CH A INPUT 50 Ω Sensitivity
and Low-Frequency Range (AC-COUPLING)
5-5
3. Check CH A INPUT 1 MΩ Sensitivity
and Low-Frequency Range
5-6
4. Check TRIG SOURCE Sensitivity 5-6
5. Check BW-5 MHz
5-6
6. Check Trigger LEVEL Range and
SLOPE Selection
5-7
Measurement Interval Checks
7. Check Crystal Oscillator Accuracy Page 5-8
8. Check Internal Gate Range 5-8
9. Check Channel B Frequency Range and 5-9
Sensitivity
10. Check External Gate
11. Check Manual Gate
12. Check External Reset
5-9
5-10
5-10
13. Check INT 1 MHz Output Page 5-11
14. Check Internal Gate Time Mark Output 5-11
15. Check Trigger Indicator 5-11
Preliminary Procedure for Performance Check
NOTE
The performance of this instrument can be checked
at any temperature within the 0°C to +50°C range
unless stated otherwise.
1. Install the 7D14 in the B horizontal plug-in compart­
ment of the Indicator Oscilloscope.
2. Connect the Indicator Oscilloscope to a power source
which meets the frequency and voltage requirements of the
oscilloscope power supply.
3. Turn the Indicator Oscilloscope power on. Allow at
least twenty minutes warmup for checking the 7D14 to the
given accuracy.
4. Set the controls as given under Preliminary Control
settings.
5. Advance the Indicator Oscilloscope Readout control
to obtain a usable readout display. Adjust the Focus and
Astigmatism controls as necessary for well-defined char­
acters in the display.
5-4