Channel to Channel Phase Match
Using different filter selections (Bessel IIR/Butterworth IIR/etc.) or different filter bandwidths results in phase mismatches between channels.
All specifications are typical static values and measured using a 10 kHz sine wave and 200 kS/s sample rate.
<
±
10V spans
≥
±
10V spans
Combined spans
Bessel IIR, Filter frequency 20 kHz
Channels on card
0.01° (3 ns)
0.04° (13 ns)
0.27° (76 ns)
GN611B Channels within mainframe
0.01° (3 ns)
0.06° (17 ns)
0.27° (76 ns)
Butterworth IIR, Filter frequency 50 kHz
Channels on card
0.02° (6 ns)
0.04° (13 ns)
0.27° (76 ns)
GN611B Channels within mainframe
0.02° (6 ns)
0.06° (17 ns)
0.27° (76 ns)
Elliptic IIR, Filter frequency 50 kHz
Channels on card
0.02° (6 ns)
0.04° (13 ns)
0.27° (76 ns)
GN611B Channels within mainframe
0.02° (6 ns)
0.06° (17 ns)
0.27° (76 ns)
GN611B channels across mainframes
Defined by synchronization method used (None, IRIG, GPS, Master/Slave, PTP)
Channel to Channel Crosstalk
Channel to channel crosstalk is measured with a 50 Ω termination resistor on the input and uses sine wave signals on the channel above and
below the channel being tested. To test Channel 2, Channel 2 is terminated with 50 Ω and Channels 1 and 3 are connected to the sine wave
generator.
Frequency [kHz]
Magnitude
[dB
]
± 10 mV: Crosstalk overview
-140
-160
-180
-120
-100
-80
-60
-40
-20
0
0.01
0.1
1
10
100
1000
Figure A.170:
Representative Channel to Channel crosstalk
On
-
board Memory
Per card
200 MB (100 MS @ 16 bits, 50 MS @ 18 bits storage)
Organization
Automatically distributed amongst channels enabled for storage or real
-
time calculations
Memory diagnostics
Automatic memory test when system is powered on but not recording
Storage sample size
User selectable 16 or 18 bits
16 bits, 2 bytes/sample
18 bits, 4 bytes/sample (required for Timer/Counter usage)
GEN3i
582
I3763-3.1 en HBM: public
