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Troubleshooting

2-101

Test 412.9 — Frequency, phase 9

Type

Pass/Fail

Fault message Frequency counter circuit

Description This test uses the same setup as test 412.1 except that shift register U811 on the A/D board sets

up the U816 ASIC to ﬁnish reading frequency and transfer the internal counts to the digital

board.

Drawing reference Analog Board; 2002-100

A/D Converter; 2002-160

Bit patterns

Test 412.10 — Frequency, phase 10

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 sets

up the U816 ASIC to ﬁnish reading frequency and transfer the internal counts to the digital

board. The counts are compared to the value obtained when the circuit was switched.

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—

0000100

—U224—

00010111

—U432—

11001010

—U810—

00000000

—U206—

01110000

—U203—

10001110

—U411—

10111100

—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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