HP 4262A - Page 96

Model
4262A
Section
IV
Figure
4-11
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
A
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.
4-29