HP E1418A, User Manual

Page: 145 / 192

Channel Voltage
Gain Calibration
Registers
The Channel Voltage Gain Calibration Registers store voltage gain
calibration constants in non-volatile memory. There are 16 registers, one
for each output channel. The register at base + 120
16
stores channel 1,
base + 122
16
stores channel 2, up to base 13E
16
which stores channel 16.
This register is non-volatile.
Address
Base + 120
16
through
Base + 13E
16
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
msb lsb
WRITE Unused Voltage Gain Calibration Constant
Voltage Gain Calibration Constant: Writing a 12-bit value to this field
stores a new constant used to calibrate the channel output. The 16-bit value
is a 2’s compliment number. Values are in the range:
000
16
minimum gain
800
16
nominal gain
FFF
16
maximum gain
Notes
Registers 00100
16
through 001BE
16
are located in non-volatile (FLASH)
memory. Writing to this memory requires a complicated sequence of
register accesses not documented here. It is recommended that calibration
be performed using the SCPI driver for the module, not register access.
Non-volatile memory has finite life, based upon the number of writes.
Use care when writing to this memory.
The contents of this register are loaded into volatile memory at power-on
and not used on an on-going basis.
145 HP E1418A Register-Based Programming Appendix B