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VXI Technology, Inc.
36 SVM2608 Programming
Control Register (0x08, 0x30, 0x58, 0x80, 0xA8, 0xD0) — Read & Write
D4 FILTER
20 kHz (Channels 0-3)/5 MHz (Channels 4-5) LPF Control – This bit
enables/disables the low pass frequency filter for the low-speed channels
and high-speed channels, respectively. . Before taking a measurement,
allow for at least 5 ms for internal circuits to settle after making changes.
0 = Filter off
1 = Filter on
P
on
state = 0
D3 TRGSLOPE
Input Trigger Source Slope – This bit sets the slope of the input trigger
for low-speed Channels 0 - 3.
0 = Positive
1 = Negative
P
on
state = 0
D2 – D0 TRIGSRC2 - 0
Trigger Source Control - Once the trigger is armed, the acquisition can
be triggered via software (FTRIG), any of the six channels or an external
trigger.
000 = Channel 0
001 = Channel 1
010 = Channel 2
011 = Channel 3
100 = Channel 4
101 = Channel 5
110 = External
111 = External High-Speed
Sample Rate (0x0C, 0x34, 0x5C, 0x84) — Read & Write
D15 – D9 Unused These bits are reserved for future use.
D8 – D0 SAMPRAT24 – 16
Sample Interval – These bits set the sample rate.
Bit Weight = 100 ns/bit
Minimum Value = 100
Maximum Value = 2
24
– 1
Sample Rate (0x0E, 0x36, 0x5E, 0x86) — Read & Write
D15 – D0 SAMPRAT15 – 0
Sample Interval – These bits set the sample rate.
Bit Weight = 100 ns/bit
Minimum Value = 100
Maximum Value = 2
24
– 1
Trigger Level (0x0A, 0x32, 0x5A, 0x82, 0xAA, 0xD2) — Read & Write
D15 – D12 Unused This is reserved for future use.
D11 – D0 TRGLVL
Trigger Level Threshold Setting – These bits set the trigger threshold
(12-bit value).
0x800 = 0 V
0x000 = -ve full scale
0xFFF = +ve full scale