Fluke 5820A, Руководство по обслуживанию

Страница: 91 / 158

Calibration and Verification
Verification
3
3-53
Table 3-25. Wave Generator Verification at 50
Ω
(cont.)
Calibrator
Mainframe
Wave Type
Calibrator
Mainframe
Output
(10 kHz)
5790A
Reading
(V rms)
Conversion
Factor
5790A Rdg x
Conversion
Factor
(V p-p)
V p-p Value
x
Correction
Tolerance
(V p-p)
square 2.50 V 2.0000 0.0751 V
sine 1.8 mV 2.8284 0.000154 V
sine 10.9 mV 2.8284 0.000427 V
sine 44.9 mV 2.8284 0.001447 V
sine 109 mV 2.8284 0.00337 V
sine 449 mV 2.8284 0.01357 V
sine 1.09 V 2.8284 0.0328 V
sine 2.50 V 2.8284 0.0751 V
triangle 1.8 mV 3.4641 0.000154 V
triangle 10.9 mV 3.4641 0.000427 V
triangle 44.9 mV 3.4641 0.001447 V
triangle 109 mV 3.4641 0.00337 V
triangle 449 mV 3.4641 0.01357 V
triangle 1.09 V 3.4641 0.0328 V
triangle 2.50 V 3.4641 0.0751 V
3-53. Pulse Width Verification
The following equipment is used to verify the pulse width:
•
High Frequency Digital Storage Oscilloscope: Tektronix 11801 with Tektronix SD-
22/26 sampling head
•
3 dB attenuator, SMA (m/f)
•
BNC(f) to SMA adapter (2)
•
N to BNC cable supplied with the Scope Calibrator (2)
Put the Calibrator into standby. Connect the N to BNC cable supplied with the Scope
Calibrator to the Calibrator Mainframe’s CHAN 1 connector. Connect the other end of
the N to BNC cable to one BNC(f) to SMA(m) adapter then to the DSO's sampling head
through the 3-dB attenuator.
Using the second BNC(f) to SMA(m) adapter and N to BNC cable, connect the
Calibrator Mainframe’s EXT TRIG (channel 5) connector to the 11801’s Trigger Input.
On the Calibrator keypad, select
5
. On the display, press the soft key under Pulse.
Press the soft key under TRIG to select the TRIG/1 External Trigger output. Press
on the Calibrator to activate the output.
Auto set the Digital Scope. Then set the Digital Scope to these starting values:
Main Time Base position (initial) 2 ns/div
Vertical scale 200 mV/div