Tektronix 73A-308, Руководство пользователя

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73A–308 Page 63
6. Using a DMM measure the voltage at each pin of P4 as listed in Table 1–2. The
voltage at each pin will be the same as the +5V source.
7. Send “E
lf
” (Enable all outputs) to the 73A-308.
8. Measure the voltage at each P4 pin shown in Table 1–2. The voltage at each pin will
be less than +500 mV.
9. Send “QRB
lf
”
10. Read “000000000000000000FF
crlf
”
11. Send “O0
lf
” (Open 0) to the 73A-308.
12. Use a DMM and measure the voltage at BIT 0–1 (refer to Table 1–2). The voltage
will be the same as the +5 V source.
13. The voltage at the remaining 7 pins shown in Table 1–2 will be less than +500 mV.
14. Send “QRB
lf
”
15. Read “000000000000000000FE
crlf
”
16. Send “O1
lf
” (Open 1) to the 73A-308.
17. Use a DMM and measure the voltage at BITs 0–1 and 0–2 (refer to Table 1–2). The
voltage on both pins will be the same as the +5 V source.
18. The voltage at the remaining 5 pins shown in Table 1–2 will be less than +500 mV.
19. Send “QRB
lf
”
20. Read “000000000000000000FC
crlf
”
21. Send “O2
lf
” (Open 2) to the 73A-308.
22. Use a DMM and measure the voltage at BITs 0–1, 0–2, and 0–4 (refer to Table 1–2).
The voltage on these pins will be the same as the +5 V source.
23. The voltage at the remaining 4 pins shown in Table 1–2 will be less than +500 mV.
24. Send “QRB
lf
”
25. Read “000000000000000000F8
crlf
”
26. Send “O3
lf
” (Open 3) to the 73A-308.
27. Use a DMM and measure the voltage at BITs 0–1, 0–2, 0–4, and 0–8 (refer to
Table 1–2). The voltage on these pins will be the same as the +5 V source.