Agilent Technologies N6705 Spezifikationen PDF herunterladen (Seite 8)

Output sequencing

Each DC power module can be

individually set to turn on or to turn

off with a delay. By adjusting the

delay times and then commanding

the Agilent N6705 to turn on, you

can set the Agilent N6705 modules

to sequence on in a particular order.

The same sequencing capability is

available to shut down the modules

in particular order. Delay times can

be set from no delay to one thou-

sand seconds of delay in one

millisecond increments.

For applications that require more

than four DC power modules to be

sequenced, this output sequencing

can be extended across multiple

Agilent N6705 mainframes. By wir-

ing together the I/O ports on the

rear panel of the mainframes, a pair

of synchronization signals is sent

between mainframes, allowing the

output sequences of each main-

frame to be synchronized.

This capability is also supported to

link Agilent N6705 output sequenc-

es with outputs installed in N6700B,

N6701A and N6702A Low-Profile

Modular Power System mainframes.

It is not supported on N6700A

mainframes.

Programmable voltage slew

For some applications, like inrush

limiting or powering rate-sensitive

devices, it is necessary to slow

down and control the speed of

the DC output to maintain a spe-

cific voltage slew rate. The Agilent

N6705 provides programmable volt-

age slew rate, so that you can eas-

ily control the speed at which the

output slews from one voltage to

another. You can set the speed of a

voltage change anywhere from its

maximum up/down programming

speed to its slowest change of up

to 10 seconds.

Series and parallel operation

To increase available voltage and

power per output, identically rated

outputs can be operated directly in

series. The maximum series opera-

tion is 240 V. To increase the avail-

able current and power per output,

identically rated outputs can be

operated directly in parallel. The

maximum rated parallel operation

is 100 A per Agilent N6705.

Convenient front panel connections

The N6705 uses 3-way binding posts

on the front panel for connection to

the DUT. The binding posts accept

standard banana plugs, bare wire,

and spade-lug connectors. The

binding posts are rated for 20 A per

connection. To avoid setup and con-

nection errors, the binding posts are

color-coded to the control keys and

the display. For modules with outputs

rated at greater than 20 A, such as

the N6753A, high current wires must

be brought out through the N6705’s

rear panel.

4-wire sensing for improved

measurement accuracy

To improve the voltage measurement

accuracy and regulation of the DC

outputs, the Agilent N6705 DC

power analyzer offers 4-wire sens-

ing capability, also called remote

sensing, on each of the four outputs

of the DC power analyzer. 4-wire

remote sensing is useful when the

DUT draws high current and you

want to account for voltage drop

in the power leads to achieve tight

regulation and high voltage mea-

surement accuracy. To use 4-wire

sensing, in addition to your power

leads, you connect two low current

sensing leads between the DUT

input terminals and 4-wire sense

terminal binding posts located on

the front of the N6705 power sup-

ply. This permits the output module

to monitor and regulate its output

voltage directly at the DUT input

terminals instead of the N6705

front panel output binding posts. It

then automatically adjusts its output

voltage to compensate for voltage

drops across the resistance in the

power leads. For convenience,

Figure 10. The Output On/Off Delays

screen allows you to enter the delay

times for each output. A graphical

representation of the settings is shown

to visually confirm your choices.

Additional Features

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