Agilent Technologies AGILENT MODELS 6023A and 6028A Control Board Test Connector, A2J7, Vdc

Table 3-1. Control Board Test Connector, A2J7

PIN NO.			SIGNAL NAME	Vdc	WAVEFORM/CONDITIONS	SOURCE
Digital-Circuits Bias & Reference Voltages
1	+5V			5.0		A2Q3 (emitter)
22	+ 20V(5V UNREG)			20.0	with 120Hz & 45KHz ripple	A1CR6, A1CR7
14	2.5V ref			2.50		A2U9 (OUT)
6	0.5V ref			0.50		A2R79,A2R80
Analog-Circuits Bias Voltages
2	+ 15V			15.0		A2U12 (OUT)
21	- 15V			-15.0		A2U4 (OUT )
Status Signals
17				TTL Lo	if in CV operation	A2Q6C-7 (collector)
		CV
16				TTL Lo	if in CC operation	A2Q6F-14 (collector)
		CC
13				TTL Hi	if not OVP shutdown	A2U11D-11
		OV
11				TTL Hi	if ac mains okay	A2U17D-11
			DROPOUT
12				TTL Hi	if not overtemp shutdown	A2U11B-6
		OT
Control Signals
25	PWM OFF			<0.5	1.7∝s TTL pulses, 20KHz	U1A-5
26	PWM ON			<1.0	1.7∝s TTL pulses, 20KHz	U2B-6
18	Ip MONITOR			<0.5	1V pk, ½ sawtooth, 20KHz	A2CR26 (cathode)
8				TTL hi	if not remotely inhibited	A2R185C, U19A-2
		INHIBIT
15				1.2-3.0		A2CR21, A2CR27
		DOWN PROGRAM
7	OVP PROGRAM			1/10 OVP (6023A)	e.g.: 2Vdc if OVP set to 20	A3R6 (wiper)
5				1/30 OVP (6028A)
				+5V	inverted OV reset line	A7U29-5
			OV CLR
19				+5V	if +5V bias OK	A2Q60-9
		PCLR 2
Commons & Current-Monitor
4	L COMMON			0.0	common return for all bias	A2C20 (-), A2R50,
					voltages, and status and control	A2U6-4
					signals
9	M COMMON			0.0	common return for 2.5V ref.	A2R83, A21-20
					and 0.5V ref.
10	I-TEST			≈0.005 ( Iout)	inboard-side monitoring res.	A1R3,A1T2
3	NOT USED

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