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Model 8902A
Installation
a. Remove the two plastic feet from the rear of the
top
cover by removing the pan-head
Pozidriv screw within each foot.
b. Unscrew the Pozidriv screw at the center of the rear edge of the top cover. This is a
captive screw and will cause the top cover
to
pull away from the front frame.
c. Lift o f f the top cover.
4. Locate tlie HP-IB address switch on the A14 Remote Interface Assembly near the front right
of the instrument. The A14 assembly may be recognized as having o n e brown and o n e yellow
printed circuit board extractor.
Figure 2-2. Thc
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Tulk Only and
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5.
Use a pencil to set the switches to the desired HP-1B address and Talk Only (TON) o r Listen
Only
(LON)
condition. The switch is illustrated i n Figure
2-2.
Facing the board, the left hand
switch (marked with a "5") is the most significant address bit
(A5
in Table 2-2). Setting
a
switch
toward the printed circuit board places it i n its "1" position. If the TON and LON switches
are both set t o
"I",
the Talk Only setting will override. If the address switches and the
TON
switch are all set to "l", the Measuring Receiver will output o n e byte (the status byte) each
measurement cycle. (Setting all switches to
" I "
defeats
HP-IB
operation.)
6.
Reinstall the top cover by reversing the procedure in previous step 3.
7. Connect the line (Mains) power cable t o the Line Power Module and reconnect the HP-IB
cable to the HP-IB connector.
8. To confirm the address, turn on the instrument and select BUS ADRS (Blue Key, LOCAL).
To
confirm
a
talk only or listen only setting, key in 21.0 SPCL. The display shows a binary
2-5
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