Agilent Technologies E1563A, E1564A user manual Range, Filter, Channel 1 Connect Register

Range, Filter, and

Channel 1, 2

Connect Register

Each channel has an 8-bit byte that controls the input signal range, filter cutoff and the relay that connects the channel to the front panel connector. The fastest way to change range, filter or the connect relay is to write a 32-bit word to the register. After every write to this register the bus is held off 10 ms until the range, filter and relay information is sent to the isolated channel. The settling time for the relays, filters and the gain amplifier is about 20 ms. This register controls channels 1 and 2. :

base + 2416

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Write

Conn1

CH 1 Filter Code

short1

CH 1 Gain Code

Conn2

CH 2 Filter Code

short2

CH 2 Gain Code

Read

Conn1

CH 1 Filter Code

short1

CH 1 Gain Code

Conn2

CH 2 Filter Code

short2

CH 2 Gain Code

WRITE/READ BITS (Range, Filter and Channel 1/2 Connect Register)

bits 0-2

Gain

These bits set the gain of the input channel by the codes shown below:

and 8-10

Code

000

= 62.5 mV range

001

= 0.25V range

010

= 1.0V range

011 = 4.0V range

100

= 16V range

101

= 64V range

110 = 256V range (also 111 = 256V range)

bits 3

short1,

These bits connect an internal short to the channel inputs when the bit is “1”. When it is “0”,

and 11

short2

bits 7 & 15 connect the channel to the input or the calibration bus.

bits 4-6 and

Filter

These bits set the input channel filter cut-off frequency by the codes shown below:

12-14

Code

000

= 1.5 kHz

001

= 6 kHz

010

= 25 kHz

011 = 100 kHz

111 = NO filter

bits 7 and

Connect

This bit connects the input channel to the front panel connector (Connect Code = 0) or to the

15

Code

calibration bus (Connect Code = 1).

Range, Filter, and

Channel 3, 4

Connect Register

Each channel has an 8-bit byte which controls the input signal range, filter cut off and the relay that connects the channel to the front panel connector. The fastest way to change range, filter or the connect relay is to write a 32-bit word to the register. After every write to this register the bus is held off 10 ms until the range, filter and relay information is sent to the isolated channel. The settling time for the relays, filters and the gain amplifier is about 10 ms. This register controls channels 3 and 4.

base + 2616	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Write	Conn3	CH 3 Filter Code			short3	CH 3 Gain Code			Conn4	CH 4 Filter Code			short4	CH 4 Gain Code
Read	Conn3	CH 3 Filter Code			short3	CH 3 Gain Code			Conn4	CH 4 Filter Code			short4	CH 4 Gain Code

Appendix B Register-Based Programming 133