14
Supplemental Performance Characteristics
The Agilent 4285A supplemental performance
characterisics are listed below. These supplemental
performance characteristics are not specifications,
but are typical characteristics included as supple-
mental information for the operator.
Stability
When the following conditions are satisfied,
Integration time: LONG
Operating temperature: Constant operating tem-
perature of 23 °C ± 5 °C
Parameter ≤ 1 MHz 30 MHz
|Z|, |Y|, L, C, R < 0.01%/day < 0.05%/day
D < 0.0001/day < 0.0005/day
Temperature coefficient
When the following conditions are satisfied,
Integration time: LONG
Test signal voltage: ≥ 20 mV
rms
Operating temperature: 23 °C ± 5 °C
Parameter ≤ 1 MHz 30 MHz
|Z|, |Y|, L, C, R < 0.004%/°C < 0.05%/°C
D < 0.00004/°C < 0.0005/°C
Settling time
Frequency (f
m
)
< 50 msec.
Test signal level
< 100 msec.
Measurement range
< 50 msec./range shift
Input protection
Internal circuit protection, when a charged capaci-
tor is connected to the UNKNOWN terminals.
The maximum capacitor voltage is:
V
max
=
1
[V]
C
where:
V
max
= ≤ 200 V
C = Capacitance value in Farads
Measurement time
Typical measurement times from the trigger to the
output of EOM at the Handler Interface. (EOM:
End of Measurement)
Integration time Measurement time
SHORT 30 ms
MEDIUM 65 ms
LONG 200 ms
In the following condition an additional measure-
ment time, approx. 300 ms, is added to the meas-
urement time.
Test signal voltage: 0.51 V – 2 V
rms
Measurement range: 0 Ω Range
Test signal current: ≥ 22 mA
Display time
Display time for each display format is given as:
MEAS DISPLAY page Approx. 8 ms
BIN No. DISPLAY page Approx. 5 ms
BIN COUNT DISPLAY page Approx. 0.5 ms
GPIB data output time
Internal GPIB data, processing time from EOM out-
put to measurement data output on GPIB lines
(excluding display time):
• Approx. 10 ms
`b
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