HP 181A INPUTS, INPUTS, INPUTS, to the rear of the chassis, in Chapter 3 of this guide, in reverse, input pads on A1 Motherboard Assembly (J16, J17)

Chapter 4 Retrofitting Options

To Retrofit the Rear Terminals (Option 060)

4	Insert the connector-end of the W1, with the washers (H6) in place
	on the connector, through the appropriate rear INPUTS opening.
5	Insert and tighten the BNC nuts (H3) to secure the coaxial cables
	to the rear of the chassis.
6	Solder the lead-end of the cables to their appropriate ground and
	input pads on A1 Motherboard Assembly (J16, J17)
	For the HP 53131A/132A solder the rear chassis INPUTS 1 cable to J16
	and INPUTS 2 to J17. (See Figure 4-3B.)
	For the HP 53181A solder the rear chassis INPUTS 1 cable to J17.
	(See Figure 4-3B.)
7	Re-install the cover by performing the cover removal procedure,
	in Chapter 3 of this guide, in reverse.
	This completes the Rear Terminals (Option 060) retrofit procedures.
NOTE	When using the front terminals of Inputs 1 and 2, the rear terminals
	should be terminated with a 50-ohm load (such as part number 1250-0207).
	When using the rear terminals, these loads should be placed on the front
	terminals, or the 50-ohm input button selected (but not both).

4

Assembly-Level Service Guide 4-17