Справочник Пользователя для Delta Tau GEO BRICK LV
Geo Brick LV User Manual
PinOuts and Software Setup
41
Setting up the Analog Output (J9)
Differential Output
Single-Ended Output
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
2
5
Analog
Device DAC-
DAC+
DAC Output
±10VDC
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
2
5
DAC Output
±10VDC
Analog
Device
DAC
COM
The analog output out of J9 is a (12-bit) filtered PWM signal, therefore a PWM frequency in the range of
30-40 KHz and a PWM deadtime of zero are suggested for a good quality analog output signal (minimum
ripple). A fully populated Brick can have one of three gates generating the clocks:
30-40 KHz and a PWM deadtime of zero are suggested for a good quality analog output signal (minimum
ripple). A fully populated Brick can have one of three gates generating the clocks:
Servo IC 0
Servo IC 1
MACRO IC 0
I19 specifies which gate is the clock source master. I19 is equal to 7007 by default indicating that Servo
IC 0 is the master gate. However, the analog output on J9 is generated from MACRO IC 0.
IC 0 is the master gate. However, the analog output on J9 is generated from MACRO IC 0.
The relationship between the PWM clock frequency of the clock-receiving gate and the clock-generating
gate should always be respected in such a way that:
Where n is an integer
Example:
With Servo IC 0 sourcing the clock at its’ recommended settings (20 KHz PWM), the following are
suggested MACRO IC 0 clock settings which would provide a good analog output signal:
With Servo IC 0 sourcing the clock at its’ recommended settings (20 KHz PWM), the following are
suggested MACRO IC 0 clock settings which would provide a good analog output signal:
Servo IC 0
Clock Settings
Resulting
Frequencies KHz
MACRO IC 0
Clock Settings
Resulting
Frequencies KHz
I7000=1473
I7001=0
I7002=7
I7002=7
I10=1677653
PWM
PHASE
SERVO
20
40
40
5
I6800=735
I6801=3
I6802=3
I6804=0
I6802=3
I6804=0
PWM
PHASE
SERVO
PWM
PHASE
SERVO
PWM
Deadtime
40
20
20
5
0
0
Note that n=2 in this case
Note
These MACRO IC0 Clock settings are optimized for a good Analog
Output signal. If the Brick is a MACRO Ring Controller then the
analog output signal quality is compromised with a much lower PWM
frequency, or should not be used at all.
Output signal. If the Brick is a MACRO Ring Controller then the
analog output signal quality is compromised with a much lower PWM
frequency, or should not be used at all.