Agilent Technologies 6628A, 6626A, 6625A Controls and Indicators Controls/Indicators Description

Number

4 (cont)

Table 3-1. Controls and Indicators (continued)
Controls/Indicators	Description	Page
	UNR- Indicates that the selected output channel is	4-4
	unregulated; i.e., it is not regulated by CV or CC control
	loops.
	OCP ENBLD - Indicates that the overcurrent protection
		3-8, 6-4,
	function for the selected channel is enabled.	5-13
	ERR - Indicates that a programming or hardware error
		4-4, 5-16
	has occurred and that the ERR bit in the serial poll
	register has not been cleared

5

6

Alphanumeric LCD Display (When power is turned on, all segments will be displayed for approximately 2 seconds).

System Control Keys (These four control keys affect the entire power supply and are independent of the output selected.)

Normally displays the measured output voltage and	3-7--3-10,
current for the selected channel. When programmed	4-4, 5-19,
from the front panel, the function being programmed	5-20,
(e.g. VSET), the output channel (e.g. 2), and the present	6-1--6-4
value (e.g. 2.250) will be displayed. Error conditions
will be spelled out in alpha characters
ADDR - Displays the power supply’s GP-IB address.	3-10, 5-2,
You can change the address using the numeric entry	6-4
keys. You cannot query or change the address remotely
(over the GP-IB).
ERR - Displays a programming or hardware error
	5-1, 5-20
message and clears the ERR bit in the serial poll register
STO - Used in conjunction with the numeric entry keys
	5-1, 5-13
to store the present output conditions for all outputs in
the specified internal register (0-10). Each register stores
the following parameters: VSET, VRSET, ISET,
IRSET, and OVSET. In addition, register 0 also stores
OCP, DLY, and MASK parameters. Register 0-3 are
non-volatile.
The parameters stored in register 0 are the "power-up"
parameters. These parameters are set upon applying AC
power to the power supply. Note that the STO
command cannot be used over the bus more than once
per non-volatile register (0-3) without cycling the AC
power (OFF and ON). However, these registers can be
used for an unlimited number of times via the front
panel keys without cycling the AC power .
RCL - Used in conjunction with the numeric entry keys
	5-1, 5-13
to recall the settings from the specified internal register
(0 to 10). All outputs are set to the recalled values.

Getting Started 33