Figure 11-18 A3542A Jumper Diagram; Jumpering - HP 9000 Series Service Manual

SCSI Peripherals and I/O Information

Jumpering

Setting the SCSI ID
Figure 11-18 shows the rear view of the A3542A

Figure 11-18 A3542A Jumper Diagram

There are three significant bits in the ID, giving an ID range of 0 to 7 inclusive as shown:
Table 11-21 SCSI ID
1 = shorted, 0 = open
The HP A3542A reads the SCSI ID at power up and during selftest in order to determine the selected
target ID of the tape drive on the interface bus. Data Compression Control is not used in this system
application. Terminator Power - When jumper is installed, the device will supply termination power to
pin 26 of the SCSI bus. (Note, this device has no on board termination capability.)
Default Jumper Settings = Term Power Disabled (no jumper)
11-44
SCSI ID Bit 2
0 0
1 0
2 0
3 0
4 1
5 1
6 1
7 1
Bit 1 Bit 0
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
Chapter 11