Agilent Technologies 85330A service manual Troubleshooting, Switch Port 1/2 Connector Pinout

Service

Troubleshooting

Table 9-3 SWITCH PORT 1/2 Connector Pinout

		D-Type	Function	D-Type	Function
		Connector Pins		Connector Pins
	1		Bit 6 HI	14	Bit 2 HI
	2		Bit 6 LO	15	Bit 2 LO
	3		Bit 7 HI	16	Bit 3 HI
	4		Bit 7 LO	17	Bit 3 LO
	5		+ 12 Vdc	18	Bit 4 HI
	6		+ 12 Vdc	19	Bit 4 LO
	7		GND	20	Bit 5 HI
	8		GND	21	Bit 5 LO
	9		GND	22	+ 12 Vdc
	0		Bit 0 HI	23	− 12 Vdc
	11		Bit 0 LO	24	GND
	12		Bit 1 HI	25	GND
	13		Bit 1 LO
Troubleshooting the
		Run the test “Verifying the Switch Control Unit” on page 2-12.
Switch Control Unit
NOTE		Check to make sure that the serial number prefixes of the Switch Control
		Unit and RF switch match. They are produced at the factory this way. It is
		acceptable to use switches and SCUs with different serial numbers. But if
		there is a problem, it may be because a newer switch is used with an older
		SCU, or an older switch is used with a newer SCU.

Troubleshooting the RF Switch

Troubleshooting the Cables

Run the test “Verifying the RF Switches” on page 2-13.

The cables will be checked during “Verifying the Switch Control Unit” and “Verifying the RF Switches” tests in Chapter 2, “Performance Verification.”

If a cable is suspected, use a voltmeter to check continuity between the connectors on each end of the cable. See Table 9-4 on page 9-12for the wiring information for each set of cables.

85330A Multiple Channel Controller 9-11