Reading Rates; Common Mode Rejection - Agilent Technologies 3458A Calibration Manual

1

Reading Rates

ACBAND Low NPLC
³10 Hz 10
³1 kHz
1
³10 kHz
0.1
Settling Characteristics
For first reading or range change error using default delays, add .01% of input step additional error.
The following data applies for DELAY 0.
Function ACBAND Low
³ 10 Hz
ACV
ACDCV 10 Hz–1 kHz
1 kHz–10 kHz
³10 kHz
Maximum Input
Related Input Non-Destructive
HI to LO ±1000 V pk
LO to Guard ±200 V pk
Guard to Earth ± 500 V pk
Volt – Hz
8
1 × 10
Product
Random Sampled Mode (ACV Function, SETACV RNDM)
Range Full Scale Maximum
Resolution
10 mV 12.000 1 µV
100 mV 120.00 10 µV
1 V 1.2000 100 µV
10 V 12.000 1 mV
100 V 120.00 10 mV
1000 V 700.0 100 mV
3
AC Accuracy
24 Hour to 2 Year (% of Reading + % of Range)
ACBAND £ 2 MHz
20 Hz 100 kHz
Range to 100 kHz to
300 kHz
10 mV 0.5+0.02 4+0.02
100 mV-10 V 0.08+0.002 0.3+0.01
100 V 0.12+0.002 0.4+0.01
1000 V 0.3+0.01
Sec / Reading
ACV ACDCV
1.2 1
1 0.1
1 0.02
DC Component
DC < 10% AC
DC > 10% AC

Common Mode Rejection

For 1 kW imbalance in LO lead, > 90 dB, DC – 60 Hz.
±1200 V pk
± 350 V pk
±1000 V pk
Input Impedance
1 MW ±15% with<140 pF
1 MW ±15% with<140 pF
1 MW ±15% with<140 pF
1 MW ±2% with<140 pF
1 MW ±2% with<140 pF
1 MW ±2% with<140 pF
300 kHz 1 MHz 20 Hz
to to to
1 MHz 2 MHz 100 kHz
0.1+0.05
1+0.01 1.5+0.01 0.1 +0.05
1.5+0.01 0.12+0.002
0.3+0.01
Settling Time
0.5 sec to 0.01%
0.9 sec to 0.01%
0.5 sec to 0.01%
0.08 sec to 0.01%
0.015 sec to 0.01%
(Temperature Coefficients
% of Reading+% of Range)/°C
0.002 + 0.02
0.001 + 0.0001
0.001 + 0.0001
0.001 + 0.0001
0.0015 + 0.0001
0.001 + 0.0001
ACBAND > 2 MHz
100 kHz 1 MHz 4 MHz
to to to
1 MHz 4 MHz 8 MHz
1.2+0.05 7 + 0.07 20 + 0.08
2+0.05 4 + 0.07 4 + 0.08 15 + 0.1
Appendix A Specifications
1. For DELAY–1: ARANGE
OFF
For DELAY 0; NPLC .1 ,
unspecified reading rates of
greater than 500/Sec are
possible.
2
2. Additional error beyond±1°
C. but within ±5°C of last
ACAL.
For ACBAND > 2 MHz,
use 10 mV range
temperature coefficient for
all ranges.
3. Specifications apply from
8 MHz
full scale to 5% of full
to
scale. DC
10 MHz
< 10% of AC, sine wave
input, crest factor=1.4, and
PRESET. Within 24 hours
and ±1°C of last ACAL. LO
to Guard switch on.
Add 2 ppm of reading
additional error for Agilent
factory traceability of 10V
DC to US NIST.
Maximum DC is limited to
400V in ACV function.
89