Spectrum-controls 1746sc-INI4vi Manual do Utilizador descarregar pdf (Página 29)

Chapter 3: Things To Consider Before Using Your Module 25

Figure 9. Signal attenuation with 500 Hz input filter

-20

-40

-60

-80

-100

-120

-140

-160

-180

-200

0 500 1000 1500 2000 2500 3000 Hz

-3 dB

131 Hz

Amplitude (in dB)

Signal Frequency

Auto-Calibration Time

Your module requires some time to auto-calibrate a channel. During this

time, your module cannot sample and convert input signals. Table 10

shows the time required for auto-calibration. When enabled, auto-

calibration occurs every 10 seconds for each channel, independently.

Table 10. Auto-calibration time per channel

(based on filter frequency)

Filter Frequency

50 Hz 60 Hz 250 Hz 500 Hz

Current Input 182 ms 152 ms 39 ms 19.6 ms

Voltage Input (-INI4vi only) 508 430 108 56

Channel Enable And

Disable Times

Your module requires some time to enable or disable a channel. During

this time, your module cannot sample and convert input signals. Table 11

shows the time required for enabling or disabling a channel.

Table 11. Channel enable and disable times.

Duration

Channel Enable Up to 6.5 ms

Enabling user-defined scaling may require an additional 0.1 ms.

Channel Disable Up to 5.5 ms

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