Instruction manual

Chapter 6 Backdating
Backdating Firmware
6-8 Assembly-Level Service Guide
6
Backdating Firmware
CHANGE 1 (Firmware Revisions 3317, 3335, 3402, 3427)
(Note: firmware revision 3413 added the new security menu item and the new
Calibration Menu to the Agilent 53131A Counter.)
(Note: firmware revision 3427 was set up to work with the new FPGA [Xilinx
3042A]; and shortens TI delay from 1 ms to 100ms. This revision is backward
compatible.
Page 2-6 thru Page 2-15 (“About the Agilent 53131A/132A Calibration Menu,” and
“The Agilent 53131A/132A Calibration Procedures” sections).
Replace with the following calibration information and procedures:
About the Agilent 53131A Calibration Menu
The Utility menu is accessed by holding the Recall key and cycling POWER key.
The Utility menu’s calibration items, illustrated on the following page, provide you
with the functions to:
• initiate the Counter’s calibration routines, which can perform automatic
calibration of the voltage offset and gain of the front-end input amplifiers, and
optional timebase
(CAL: OFFS 1 / 2 ?, GAIN 1 / 2 ?, TIMEBAS ?, and TI 1Æ2?).
Recall Utility Menu:
Hold at power up
Utility
POWER