General Information - 2
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Description and Model Differences
The Agilent 66111A Fast Transient DC Source is a high performance dc power source that provides peak
current sourcing and rapid, basic measurements in a compact, half-rack box. It is designed to simplify the
testing of digital wireless communications products. Excellent voltage transient response characteristics
prevent test interruptions due to triggering of low voltage phone shutdown. The 15 volt source and 5A
peak current capability provides compatibility with a number of communications standards, including:
GSM, CDMA, TDMA, PCS, DECT, TERA, PHS, NADC, PHS, and others. Figure 2-1 describes the
output characteristic of the dc source.
The Agilent 66311B Mobile Communications DC Source is a high performance dc power source that
provides all of the capabilities of the Agilent 66111A plus fast dynamic measurement and analysis of
voltage and current waveforms. Dynamic measurement and analysis of current waveforms combined with
precision current measurement let you characterize cellular phone current requirements under all
operating conditions.
The Agilent 66309B Mobile Communications DC Source includes all of the capabilities of the Agilent
66311B with the addition of a second, electrically-isolated output. Figure 2-2 describes output
characteristic of this second output, which is primarily used to provide voltage or current for a charger
input on the device under test. The second output has all of the basic programmable features as the main
output, with the exception of the waveform measurement capability, the open sense lead detect
capability, overvoltage protection, and low current range.
The Agilent 66311D and 66309D Mobile Communications DC Sources also contain an auxiliary DVM,
with input terminals located on the rear panel. This provides limited, low voltage dc and ac measurement
capability, which can be used to monitor test point voltages on the unit under test as well as on the test
fixture. The common mode voltage range is from −4.5 Vdc to +25 Vdc relative to the minus terminal of
output 1. The DVM is programmable from the front panel of the instrument as well as remotely using
SCPI programming commands.
Table 2-3. Model Differences
Item Agilent
66111A Agilent
66311B Agilent
66311D Agilent
66309B Agilent
66309D
Waveform measurements NO YES YES YES1YES1
Low range current
measurements NO YES YES YES1YES1
ACDC measurement
detector NO YES YES YES1YES 1
Output compensation YES YES YES YES1YES1
Open sense lead protection YES YES YES YES1YES1
Auxiliary output (output
2) NO NO NO YES YES
External DVM input NO NO YES NO YES
Adjustable measurement
buffer YES YES YES YES YES
Compatibility commands YES YES YES NO NO
RS-232 interface YES YES YES NO NO
1Applies to the main output (output 1) only.