Figure 10. low/high level reference registers – CH Tech Pulse Generator User Manual
Page 20
14
Low/High Level Reference Register (10 & 12) Two 12 bit Digital to Analog Converters (DAC)
are used to create the low and high level references to the output logic. These registers are write
only. See Figure 10 for details.
10
Low Level Reference Registers
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Not Used
Reference Voltage
Read
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Ref. Voltage
2 Ohm Output Imp:
000h = -10.0 V, 800h = 0.0 V, FFFh = 10.0 V, bit resolution = 4.884 mV
50 Ohm Output Imp:
000h = -5.0 V, 800h = 0.0 V, FFFh = +5.0 V, bit resolution = 2.442 mV
12
High Level Reference Registers
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Not Used
Reference Voltage
Read
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Ref. Voltage
2 Ohm Output Imp:
000h = -10.0 V, 800h = 0.0 V, FFFh = 10.0 V, bit resolution = 4.884 mV
50 Ohm Output Imp:
000h = -5.0 V, 800h = 0.0 V, FFFh = +5.0 V, bit resolution = 2.442 mV
NOTE: The Low Level Reference should not be programmed more positive than the High Level
Reference. Likewise, the High Level Reference should not be programmed less
negative than the Low Level Reference.
Figure 10. Low/High Level Reference Registers