Warranted Electrical Characteristics - LeCroy AP034 Instruction Manual

WARRANTED ELECTRICAL CHARACTERISTICS

²
Warranted characteristics are parameters with guaranteed
performance. Unless otherwise noted, tests are provided in the
Performance Verification
specifications.
LF Gain Accuracy:
Common Mode Rejection Ratio
1
Notes: ÷10 and ÷20 obtained with external plug-on attenuators
2 Output impedance is 50 Ω, intended to drive 50 Ω. Add
uncertainty of termination impedance to accuracy.
3
LeCroy measures CMRR with a fixture that connects
the probe tip ground to the signal source ground. This
method is necessary to obtain a reproducible CMRR
measurement.
Often, users leave the probe tip ungrounded when
measuring high frequency signals. Not grounding the
probe tip can actually improve CMRR by allowing
some of the common mode signal to be impressed
across the entire length of the probe cable instead of
from probe tip to probe ground. The CMRR
improvement obtained without grounding the probe tip
depends on proximity to probe cable ground; therefore,
it is nonreproducible.
LeCroy has chosen to use a reproducible method of
measurement, rather than obtain a more optimistic
measurement.
ISSUED: January 2000
$3 $FWLYH 3UREH
Procedure for
2% into 50.0 Ω load
measured at 1 kHz
3
: (probe head grounded, DC
coupled without attenuator)
70 Hz ≥ 80 dB
1 MHz ≥ 40 dB
100 MHz ≥ 25 dB
all warranted
2
,
AP034-OM-E Rev D