Agilent Technologies DC140 Uživatelský manuál stáhnout pdf (Strana 15)

DC power supply specifications (continued)

Square-wave output characteristics

Table 10. Square-wave output characteristics

Parameter Range Characteristics

Amplitude accuracy

± (offset)

S1 (30 V/1 A) and S1S2 (AUTO) 0.2 V

S2 (8 V/3 A) and S1S2 (AUTO) 0.2 V

Amplitude resolution

S1 (30 V/1 A) 1 mV

S2 (8 V/3 A) 1 mV

Frequency accuracy

± (% of frequency setting + offset)

(27 steps

) 0.005% + 0.01 Hz

Frequency resolution — 0.01 Hz

Duty cycle accuracy

± (% of duty cycle setting)

(256 steps: 0.39% to 99.60%) 0.4%

2, 3

Duty cycle resolution — 0.39%

Pulse width accuracy

3, 4

± (offset)

(256 steps: 1/frequency) Duty cycle/frequency

Pulse width resolution — Range/256

1. Available frequencies: 0.5, 2, 5, 6, 10, 15, 25, 30, 40, 50, 60, 75, 80, 100, 120, 150, 200, 240, 300, 400, 480, 600, 800, 1200, 1600, 2400, 4800(Hz).

If range S1S2 (AUTO) is selected, available frequencies range is 10 to 4800 Hz, with fixed 50% duty cycle:

Output Range Adjustable step Accuracy

Frequency 10.0 Hz to 4800.0 Hz 10 Hz/100 Hz/1000 Hz

around

0.005% + 0.1 Hz

(according to the display of frequency indication)

2. For frequency signals greater than 100 Hz, an additional 0.1% per 100 Hz is added. The accuracy of the duty cycle should be calculated as:

Accuracy =

(

0.4% +

[(

frequency

– 1

)

× 0.1%

])

100

Calculation example: Frequency setting = 4800 Hz, Duty cycle setting = 50%

Characteristic of duty cycle = ± 0.4% +

[(

4800

– 1

)

× 0.1%

]

= ±

5.1

= ± 5.1%

100 100

The duty cycle accuracy (for frequency setting 4800 Hz) is calculated as 50% ± 5.1%.

3. Characteristic applies when the positive or negative pulse width is greater than 50 μs.

4. For frequency signals greater than 100 Hz, an additional 0.1% per 100 Hz is added. The accuracy of the pulse width should be calculated as:

(

0.4% +

[(

frequency

– 1

)

× 0.1%

])

100

Accuracy =

frequency

Calculation example: Frequency setting = 4800 Hz, Duty cycle setting = 50%

Characteristic of pulse width = ±

((

0.4% +

[(

4800

– 1

)

× 0.1%

])

)

= ±

5.1

)

= ± 10.625 µs

100 4800 100 4800

The pulse width accuracy (for frequency setting 4800 Hz and duty cycle setting 50%) is calculated as 0.1042 ms ±10.625 μs.

The rise and fall time are 25 μs typically between 10% and 90% of the signal amplitude.

The additional load regulation is 0.15 V/A.

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