HBM Genesis GEN5i User Manual page 334

Analog input GN110, GN111, GN112 and GN113 (Transmitter)
Input overload protection
Over voltage impedance change
Maximum nondestructive voltage
Overload recovery time
Analog to Digital Conversion
Sample rate; per channel
ADC resolution; one ADC per channel
ADC Type
Time base accuracy
Binary sample rate
Maximum binary sample rate
External time base sample rate
External time base level
External time base minimum pulse width
Mainframes using Interface/Controller modules shipped before 2012: ± 30 ppm
(1)
Amplifier Bandwidth and Filtering
Using different filter selections (Wideband/Bessel/Bessel IIR) or different filter bandwidths will lead to phase mismatches between channels.
Wideband
Bessel (Fc @ -3 dB)
Bessel IIR (Fc @ -3 dB)
Wideband
When wideband is selected there is neither an analog anti alias filter, nor any digital filter in the signal path. Therefore there is no anti alias
protection when wideband is selected.
Wideband bandwidth
Passband flatness
334
The activation of the over voltage protection system will result in a reduced input impedance.
The over voltage protection will not be active as long as the input voltage is less then
200 % of the selected input range or 250 V whichever is the smallest value.
± 125 V DC; Ranges < ± 2 V
± 250 V DC; Ranges ≥ ± 2 V
Restored to 0.1 % accuracy in less than 50 ns after 200 % overload
Restored to 10 % accuracy in less than 10 ns after 200 % overload
0.1 S/s to 100 MS/s
14 bit
CMOS pipelined multistep converter, LTC2254
Defined by mainframe: ± 3.5 ppm
Not supported
N/A
0 S/s to 10 MS/s
TTL
50 ns
When wideband is selected there is neither an analog anti alias filter, nor any digital filter in
the signal path. Therefore there is no anti alias protection when wideband is selected.
Should not be used if working in frequency domain with recorded data.
This analog Bessel filter can be used to reduce the higher bandwidth signals, but is also
used to prevent aliasing at the 100 and 50 MS/s sample rates. For lower sample rates the
digital Bessel IIR filter must be used to prevent aliasing. Bessel filters are typically used
when looking at signals in the time domain. Best used for measuring transient signals or
sharp edge signals like square waves or step responses.
When Bessel IIR filter is selected, this is always a combination of an analog Bessel anti
alias filter and a digital Bessel IIR filter. Can only be used for sample rates up to 50 MS/s.
Bessel filters are typically used when looking at signals in the time domain. Best used for
measuring transient signals or sharp edge signals like square waves or step responses.
Between 27 MHz and 36 MHz (-3 dB)
(1) 0.1 dB; DC to 1 MHz
(1) ; aging after 10 years ± 10 ppm
GEN5i
I2679-4.0 en