HP 4262A Operating And Service Manual page 96

PERFORMANCE TESTS
13) Again enables acceptance of SRQ from device
because SRQ is disabled when Status Byte signal
transfer is completed (re to Para 3-70).
14) After service subroutine is completed, return to
the step that follows step 7, 8, or 9 as appro-
priate to main programming sequence.
Serial Poll 1
L Step 10
*STB = Status Byte
Stores *STB
in register B
Step 15
READ DATA
Step 11
Checks SRQ
YES/NO line
of *STB
Step 12
Print
Setp 13
Interrupt Enable
Return
Step 14
Figure 4-11 SRQ Service Routing.
[RESULTS]
Calculator prints LCR and DQ values of the sample measured by 4262A (test fre-
quency 10kHz). Verifies that 4262A SRQ lamp lights momentarily. Press calculator
RUN button again to repeat checks. If calculator prints OTHER DEVICE SRQ,
interface is faulty.
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