Appendix A: Options and Accessories
This section describes the various options as well as the standard and 
optional accessories that are available for the 2221A Digital Storage Oscillo
scope.
Options
The Options listed below may be ordered with the instrument or ordered 
separately:
Options A1-A5: International Power Cords
Besides the standard North American,  110 V, 60 Hz power cord, Tektronix 
ships any of five alternate power cord configurations with the oscilloscope 
when ordered by the customer.
Table A-1:  International Power Cords
Option Power Cord
A1 Universal European  220 V, 50 Hz
A2
UK — 240 V, 50 Hz
A3
Australian  240 V, 50 Hz
A4
North American — 240 V, 60 Hz
A5
Switzerland — 220 V, 50 Hz
OPTION 10: GP1B Interface
Option 10 provides a GPIB {General Purpose Interface Bus) communications 
interface. The interface implemented conforms to the specifications con
tained in IEEE Standard Digital interface for Programmable Instrumentation 
(ANSI/IEEE Std 488—1978). It also complies with a Tektronix Standard relat
ing to GPIB Codes, Formats, Conventions and Features. The 2221A, 2224, & 
2232 GPIB & RS-232-C Optional Interfaces User Manual {070-8159-xx) 
provides operating information for the Option 10 GRIB interface.
The GPIB option may be ordered separately as a kit (F-10). The kit includes 
the user manual listed above as well as instructions for installation.
OPTION 12: RS-232-C Interface
Option 12 provides an RS-232-C serial communications interface. The 
interface implemented conforms to RS-232-C specifications. The option 
provides both DTE and DCE capability to aid .in hooking up the various
A-1
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2221A User Manual