Tektronix 2221 - Page 80

Options and
Accessories
—
2221
Operators
Table 7-1
Extended
Memory
Specification
Characteristic
Performance
Requirement
NON - VOLATILE EXTENDED MEMORY
Available
Waveform
Memory
26
Kbytes .
Power
Down
Battery
Voltage
|
Data
Retention
Memory retained for battery voltages greater than 2.3 V.
Memory maintained greater than six months without instrument
power .
Power down data - retention specification shall be maintained for
three years without battery change with normal oscilloscope use .
Battery
Life
Power
Down
Detection
Threshold
Fail asserted for supply drop to less than 4.75 V.
u
Reset
held
until
supply
is
greater than 5.0
V.
Power down
interrupt to reset
delay
greater than or
equal to 1
ms .
Reset
Delay
u
Table 7-2
Function
Subsets
Implemented
ال
Other Subsets
Required
u
Function
Subset
Capability
States Omitted
Other
Requirements
None None T6
None
None
None
SH1
(
Source
Handshake
)
Complete
Capability
AH1 (
Acceptor Complete
Capability
Handshake
)
T6
(
Talker )
Basic
Talker
,
Serial Poll ,
Unaddress if
MLA
None
Include (
MLA (
ACDS ) ]
SH1
and
L3
L3 (
Listener
) None
Basic
Listener
,
Listen
Only ,
Unaddress if MTA
Include (
MTA (
ACDS ) ]
AH1 and T6
SR1 (
Service
Request )
u
Complete
Capability
None
None
T6
RL2 (
Remote /
Local )
No Local
Lockout
None
L3
LWLS
and
RWLS
No
Capability
All
None
None
PPO (
Parallel
Poll
)
DC1 (
Device
Clear )
None
None
L3 Complete Capability
(
Selective
Device
Clear )
No
Capability All None
None
DTO (
Device
Trigger )
CO (
Controller
)
E2 (
Drivers )
No
Capability
All
None
None
Three
-
state
7-4