Tektronix TLA Series, Service Manual

Page: 70 / 130

Adjustment Procedures
5- 6
TLA Series Digitizing Oscilloscope Modules Service Manual
This procedure performs an internal and external calibration on the DSO module.
The
INTERNAL_CAL
test is the performance verification and adjustment software
equivalent of
SELF
_CAL.
SW test names EXTERNAL_CAL, INTERNAL_CAL
Equipment
required Voltage reference (item 7)
Precision BNC cable (item 12)
Dual banana-to-BNC adapter (item 6)
Capacitor, 0.1 F
1
(item 8)
Prerequisites Warm-up time: 30 minutes
Test equipment connected as shown in Figure 5--1
Power-up diagnostics pass
No previous tests required
1
Install the 0.1 F capacitor across the voltage reference output terminals to reduce
noise.
DSO module
CH 1
--
+
Voltage reference
Dual
banana-to-BNC
adapter
Precision BNC
cable
0.1 F Capacitor
Figure 5- 1: Initial setup for the base calibration adjustment
DSO Procedure 1:
Base Calibration