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Service Addendum 3
Chapter 1 Differences
Firmware Revisions
The Agilent E4350B/E4351B SAS firmware resides in the front panel board’s ROM chip (A3U4), the GPIB
board’s ROM chip (A2U106), and in the DSP board’s ROM chips (A5U734 and A5U735).
Use the *IDN query as described in chapter 3 of the Service Manual to get the firmware revision numbers.
Chapter 2 Differences
Test Equipment Required
Table 2-2. Test Equipment Required for Verification
Type Required Characteristics Recommended Model
Current Monitor Resistor 15A (0.1 Ohm) +/- 0.04% Guildline 9230/15
DC Power Supply 5V @ 10A Agilent 6642A, 6653A
Digital Voltmeter Resolution: 10 nV @ 1 V
Readout: 8 1/2 digits
Accuracy: 20 ppm
Agilent 3458A
Electronic Load Voltage and current range must
exceed range of supply under test.
Power range: 500 W min.
Agilent 6050A mainframe with
Agilent 60504A (60 V) plug-in
module, or Agilent 60504A-J10 (120
V) plug-in module.
GPIB Controller Full GPIB capabilities HP Series 300
Load Resistor
(for CC rms ripple and noise tests)
2 – 16 Ohm 300W (adjusted for 15
Ohm each connected in parallel or
series)
1 – 1.6 Ohm 300W
Ohmite E300K16R
Ohmite E300K1R6
Oscilloscope Sensitivity: 1 mV
Bandwidth limit: 20 MHz
Probe: 1:1 with RF tip
Agilent 54504A
RMS Voltmeter True rms bandwidth: 20 MHz
Sensitivity: 100 uV
Agilent 3400B
Variable-Voltage Transformer Adjustable from -13% to +6% of
input range.
Power: 1 kVA min.
Superior Electric
0 to 280 Vac, 7.5 A (226U)
0 to 140 Vac, 15 A (126U)