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Troubleshooting

2-97

Bit patterns

Test 412.2 — Frequency, phase 2

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 board is

conﬁgured to set up the U816 ASIC to read frequency.

Drawing reference Analog Board; 2002-100

A/D Converter; 2002-160

Bit patterns

Bit pattern* Register

—U400—

01001100

—U811—

00000000

—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—

00001010

—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.

Brand	Keithley
Model	2002
Category	Multimeter
Language	English

Keithley 2002 Repair Manual

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Keithley 2002 Specifications

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