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8842A
Instruction Manual
805-4
3. Disconnect the ribbon cable from the plastic rear panel insert by pulling the tabs
on either side of the ribbon cable connector outward. Pull the ribbon cable
directly toward the front panel (Figure 805-1C).
4. Remove the rear panel insert by releasing the two snap tabs inside the instrument
(Figure 805-1D).
NOTE
The connection on the rear panel insert is used for factory calibration only.
The connector is electrically isolated from all measuring circuitry.
5. Connect the the ribbon cable from the Main PCA to the connector on the IEEE-
488 Interface PCA (Figure 805-1E).
6. Latch the ribbon cable in place as shown in Figure 805-1F.
7. Make sure the heads of the plastic latches are in the extended position.
8. With the component side down, guide the BNC and IEEE-488 connectors
(located on the rear of the IEEE-488 Interface PCA) into the rear panel, and seat
the IEEE-488 Interface PCA on the mounting supports on the chassis (Figure
805-1G).
9. Fasten the IEEE-488 Interface PCA to the chassis by pressing the two plastic
latches into the mounting supports. (See Figure 805-1H.)
10. Secure the IEEE-488 connector to the rear panel with the two screws and
washers supplied.
11. Replace the cover and rear bezel on the chassis and attach the two ear panel
mounting screws.
12. Attach the grounding screw to the bottom of the case.
WARNING
TO AVOID ELECTRIC SHOCK, ENSURE THE GROUNDING
SCREW IS FIRMLY ATTACHED TO THE CASE BOTTOM.
805-5. PROGRAMMING INSTRUCTIONS
Programming instructions are presented in Section 3. That section also explains how to
set up the 8842A on the IEEE-488 bus.
805-6. MAINTENANCE
All service information regarding Option -05 is contained in Section 6. The theory of
operation is contained in Section 5.
805-7. LIST OF REPLACEABLE PARTS
A list of replaceable parts for the IEEE-488 Interface printed circuit assembly (PCA) is
given in Table 805-1. Refer to Section 7 for ordering information.
Caution
The symbol Y indicates a device that may be damaged by static
discharge.