Analog Signal Switching States - Keithley 2701 Service Manual

Model 2701 Ethernet-Based DMM / Data Acquisition System Service Manual

Analog signal switching states

The following tables provide switching states of the various relays, FETs, and analog switches for the
basic measurement functions and ranges. These tables can be used to assist in tracing an analog
signal from the input to the A/D multiplexer.
DCV signal switching
Range Q101
100 mV ON
1 V ON
10 V ON
100 V OFF
1000 V OFF
* K101 set states:
ACV and FREQ signal switching
Range Q101 Q102
100 mV ON
1 V ON
10 V ON
100 V ON
750 V ON
*K101 and K102 reset states: Pin 8 switched to Pin 9
K101 and K102 set states:
Ω2 signal switching
Range Q101
100 Ω ON
1 kΩ ON
10 kΩ ON
100 kΩ ON
1 MΩ ON
10 MΩ ON
100 MΩ ON
*K101 set states:
K102 reset states: Pin 8 switched to Pin 9
2701-902-01 Rev. B / December 2018
Q102 Q114 Q136
ON OFF OFF
ON OFF OFF
ON OFF OFF
OFF ON ON
OFF ON ON
Pin 8 switched to Pin 7
Pin 3 switched to Pin 4
U103
K101* K102* pin 8
RESE RESE
ON ON
T T
ON ON
RESE RESE
ON OFF
T T
ON OFF
RESE SET
ON OFF
T
SET
RESE
SET
T
RESE
T
Pin 3 switched to Pin 2
Pin 8 switched to Pin 7
Pin 3 switched to Pin 4
Q102 Q114 Q136 Q109
ON OFF OFF OFF
ON OFF OFF OFF
ON OFF OFF OFF
ON OFF OFF OFF
ON OFF OFF OFF
ON OFF OFF ON
ON OFF OFF ON
Pin 8 switched to Pin 7
Pin 3 switched to Pin 4
Pin 3 switched to Pin 2
Q109 K101* Q113 Q105
OFF SET OFF OFF
OFF SET OFF OFF
OFF SET OFF OFF
OFF SET OFF OFF
OFF SET OFF OFF
U103 U105 U105
pin 9 pin 9 pin 8
ON OFF OFF
ON OFF OFF
OFF ON OFF
OFF ON OFF
OFF ON ON
K101* K102* Q113
SET RESET OFF
SET RESET OFF
SET RESET OFF
SET RESET OFF
SET RESET OFF
SET RESET OFF
SET RESET OFF
Section 4: Troubleshooting
Q14/Q
Q104 Q108 13
ON OFF OFF
ON OFF OFF
ON OFF ON
OFF ON OFF
OFF ON OFF
U103 U103 U105 U111
pin 16 pin 1 pin 1 pin 16
OFF ON ON OFF
ON OFF OFF OFF
OFF ON ON OFF
ON OFF OFF OFF
OFF OFF OFF OFF
Q105 Q104 Q108 Q11
ON OFF OFF ON
ON OFF OFF ON
ON OFF OFF ON
ON OFF OFF OFF
ON OFF OFF OFF
ON OFF OFF ON
ON OFF OFF ON
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