Atec Agilent-53200A Series - Manual (Page 20)

20
±(0.2%-of setting + 0.1%-of range)
V/s (at threshold point)
Definition of Measurement Error Sources and Terms
used in Calculations
continued
Phase Noise and Allan Deviation
The input signal’s jitter spectrum (Phase noise) and low-frequency wander char-
acteristics (Allan variation) will limit the achievable measurement resolution and
accuracy. The full accuracy and resolution of the counter can only be achieved
when using a high-quality input signal source or by externally filtering the input
signal to reduce these errors.
Threshold level setting error (T
LSE
)
Threshold level setting error (T
LSE
) is the uncertainty in the actual signal thresh-
old point due to the inaccuracies of the threshold circuitry.
Slew rate (SR)
Slew rate (SR) describes the input signal’s instantaneous voltage rate of change
(V/s) at the chosen threshold point at customer BNC.
For sine wave signals, the maximum slew rate SR= 2πF*V
0 to PK
.
For Square waves and pulses, the max slew rate = 0.8 Vpp/ t
RISE 10-90
Using the 100 kHz low pass filter will effect Slew Rate.
Signal noise (E
N
)
The input signal RMS noise voltage (E
N
) measured in a DC - 350 MHz bandwidth.
The input signal noise voltage is RSS combined with the instruments equivalent
input noise voltage when used in the Threshold Error (T
E
)
calculation.