Specifications

Disassembly 4

Series N6700 Service Guide 87

Installing a Redundant Ground for 400 Hz Operation

Operation at 400 Hz requires the installation of a redundant ground

from the instrument chassis to earth ground. The redundant ground

must be permanently attached to the unit as well as to the earth

ground point.

The following procedure only describes how to make the permanent

connection at the unit. The user must ensure the integrity and

permanence of the connection at the earth ground point.

The following customer-supplied hardware is required:

 Ground wire (14/16 AWG)

 Uninsulated ring terminal for attaching wire to unit

(Tyco p/n 34124 or equivalent)

 Hardware for attaching wire to earth ground point

The following tools are required for installing the redundant

ground:

 3/8 inch hex wrench

Step 1. Remove the top cover of the GPIB board as previously described

under “Accessing the Calibration switch”.

Step 2. Use the wrench and remove the binding post (1) from the rear of the

chassis. The binding post is located between the AC input connector

and the GPIB connector.

Step 3. Crimp the appropriate ring terminal (2) onto the end of the ground

wire.

Step 4. Place the ring terminal onto the threaded end of the binding post. Re-

install the binding post on the chassis with the washer and nut (3).

Step 5. Rotate the ring terminal so that the ground wire does not interfere

with any other connectors on the back of the unit. Use the wrench

and tighten the binding post to the chassis (Torque = 20 – 25 in-lb.).