HP E1563A User Manual page 124

Range, Filter, and
Channel 1, 2
Connect Register
base + 24 15 14
16
Write Conn1 CH 1 Filter Code
Read Conn1 CH 1 Filter Code
Range, Filter and Channel Connect register bits defined:
bits 0-2 Gain
and 8-10 Code
bits 3 short1,
and 11 short2
bits 4-6 Filter
and 12-14 Code
bits 7 and Connect
15 Code
Range, Filter, and
Channel 3, 4
Connect Register
base + 26 15 14
16
Write Conn3 CH 3 Filter Code
Read Conn3 CH 3 Filter Code
124 HP E1563A and E1564A Register-Based Programming
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 µs 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.
13 12 11 10
short1 CH 1 Gain Code
short1 CH 1 Gain Code
WRITE/READ BITS (Range, Filter and Channel 1/2 Connect Register)
These bits set the gain of the input channel by the codes shown below:
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)
These bits connect an internal short to the channel inputs when the bit is "1". When it
is "0", bits 7 & 15 connect the channel to the input or the calibration bus.
These bits set the input channel filter cut-off frequency by the codes shown below:
000 = 1.5 kHz
001 = 6 kHz
010 = 25 kHz
011 = 100 kHz
111 = NO filter
This bit connects the input channel to the front panel connector (Connect Code = 0) or
to the calibration bus (Connect Code = 1).
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 µs 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.
13 12 11 10
short3 CH 3 Gain Code
short3 CH 3 Gain Code
9 8 7 6
Conn2 CH 2 Filter Code
Conn2 CH 2 Filter Code
9 8 7 6
Conn4 CH 4 Filter Code
Conn4 CH 4 Filter Code
5 4 3 2
short2 CH 2 Gain Code
short2 CH 2 Gain Code
5 4 3 2
short4 CH 4 Gain Code
short4 CH 4 Gain Code
Appendix B
1 0
1 0