Keithley 2002 Repair Manual

Troubleshooting
2-98
Test 412.3 — Frequency, phase 3
Type
Circuit Exercise
Fault message None
Description This test uses the same setup as test 412.1 except that shift register U811 on the A/D sets up the
U816 ASIC to read frequency.
Drawing reference Analog Board; 2002-100
A/D Converter; 2002-160
Bit patterns
Test 412.4 — Frequency, phase 4
Type
Circuit Exercise
Fault message None
Description This test uses the same setup as test 412.1 except that the SELFTEST line is toggled to make
Q425 switch.
Drawing reference Analog Board; 2002-100
A/D Converter; 2002-160
Bit patterns
Bit pattern* Register
—U400—
01001100
—U811—
00001000
—U224—
00010111
—U432—
11001010
—U810—
00000000
—U206—
01110000
—U203—
10001110
—U411—
10111000
—U809—
00000000
—U207—
11001111
—U221—
11101001
—U406—
11101100
AD_STB
MUX_STB
R1_STB
R2_STB
*Bits associated with register IC terminals as follows:
QQQQQQQQ
87654321 87654321 87654321 87654321
IC pins: Q8=11, Q7=12, Q6=13, Q5=14, Q4=7, Q3=6, Q2=5, Q1=4.
Bit pattern* Register
—U400—
01001100
—U811—
00001000
—U224—
00010111
—U432—
11001010
—U810—
00000000
—U206—
01110000
—U203—
10001110
—U411—
10111000
—U809—
00000000
—U207—
11001111
—U221—
11101001
—U406—
11101110
AD_STB
MUX_STB
R1_STB
R2_STB
*Bits associated with register IC terminals as follows:
QQQQQQQQ
87654321 87654321 87654321 87654321
IC pins: Q8=11, Q7=12, Q6=13, Q5=14, Q4=7, Q3=6, Q2=5, Q1=4.

Keithley 2002 Specifications

General

Brand	Keithley
Model	2002
Category	Multimeter
Language	English