Agilent Technologies 2948, 2712A FRONT-TO-REAR-PANELOUTPUT Conversion Description, Parts Required

Model 8904A Instrument Changes

7-4. FRONT-TO-REAR-PANELOUTPUT CONVERSION Description

This procedure describes how to convert an instrument with front-panel output connectors (that is, a standard instrument) to one with rear-panel connectors (that is, Option 004). The procedure applies to instruments with one pair of outputs or two (that is, Option 002).

The modifications requires partial disassembly of the instrument (removing covers and routing of cables). No soldering is required. Modification should be done in a static protected environment. After modification, two performance tests must be run.

Parts Required

The following parts are required and may be ordered by contacting the nearest Hewlett-Packard Sales Office.

Table 7-1.Parts for HP 8904A Rant-to-Rear-Panel Output Conversion
Option	I Quantity	Description	HP Part Number
Standard		Plastic Hole-Plug	6960-0132
Option 002		Plastic Hole-Plug	6960-0132
Standard		Lock Washer 0.505 inch ID	2190-0068
Option 002		Lock Washer 0.505 inch ID	2190-0068
		Cable Tie	1400-0249
		Label Blank	5180-1871

Tools Required

The following tools are needed to modify the instrument:

9/16 inch, 6 point Nut Driver No. 2 Pozidriv Screwdriver Diagonal Cutters Needle-nose Pliers

Modification Procedure

Removing Bottom Cover

1.Turn the instrument off and unplug the power cord.

2.Lay the instrument on its top and unscrew the Pozidriv screw in the middle of the rear edge of the bottom cover. This is a captive screw and will cause the bottom cover to push away from the frame. Slide the cover back about 6.5 mm (0.25 inch) and lift it off.

Preparing the Chassis

1.Remove the nuts from the present front-panel outputs with the 9/16 inch nut driver. Do not press against the front panel with the tool or scoring of the panel may occur.

2.Remove the cable tie around the loop of slack coaxial cable in the instrument by cutting it with the diagonal cutters being careful not to score the soft insulation on the cables.

3.Remove the necessary plastic hole-plugs in the rear panel by approaching them from inside the chassis with the needle-nose pliers and squeezing-in the small holding tangs on opposite sides of the plug. Grasp the front of the plug with your fingers to pull it away from the panel. Do not attempt to pry the plug out from the panel or the panel surface may get scarred.

rev.15DEC89 Front-to-Rear-Panel Output Conversion 7-3