Hewlett Packard HP 9145A Guía De Referencia página 4

Rear Panel
8. Self-test Displays
9. HP-IB Connector
10. HP-IB Address Switch
11. Power Fuse
12. AC Line Connector
Write-protecting a Tape Cartridge
13. Pointing away from SAFE
Write data and read data.
14. Pointing towards SAFE
Read data only.