Datasheet

Performance Verification
Front End Characteristics
Worksheet
The Front End Ch
aracteristics procedure requires several measurements, which
are used to calculate the characteristics of the instrument. The calculations shown
in this worksheet use the line references (Ref) to indicate which measured value to
use in that calculation.
There is also a spreadsheet version of the test record, available from the paperclip
icon on Page 2-2, which will perform the calculations automatically as the
measured v alue s are entered.
Table 2-3: Front End Characteristics Worksheet
Ref Name
Measurement Step
or Calculation Value Units
Copy into
Test Record
Measure:
A
Terminator Only Step 6
V
B First Attenuator
Step 7
V
C Second Attenuator Step 8
V
Channel A Channel B
D 1X Trigger Level Uncertainty
Step 14
mV X
E 1X Just Triggers
Step 15
V
F 10X Trigger Level Uncertainty
Step 18
mV X
G
10X Just Triggers
Step 18
V
H 10X Just Becomes Inaccurate
Step 21
V
I 1X Just Becomes Inaccurate
Step 26
V
Calculate:
J
10X Attenuator Correction A/B
na
K
100X A ttenuator Correction A/C
na
L
1X Pk-Pk Noise
((I – E) / K) × 500
mV
M 10X Pk-Pk Noise
((H – G) / J) × 500
mV
N
1X noise (RMS) L / 2 / 3.1
mV X
O
1X Hysteresis Window
(((I + E) / 2) / K) × 1000
mV X
P
10X Noise (RMS) M / 2 / 3.1
mV X
Q
10X Hysteresis Window
(((H + G) / 2) / J) × 1000
mV X
2–6 FCA3000, FCA3100, and MCA3000 Series Specifications and Performance Verification