OMNISCANNER User Guide
A - 4
OMNIFIBER Test Functions
· Multimode Fiber: Length, Propagation Delay, Loss
· Single-mode Fiber: Length, Propagation Delay, Loss
Transmission Performance Measurement Method
All cabling transmission performance measurements (NEXT, RL, Attenu-
ation, and ELFEXT) are implemented using swept frequency domain,
vector, digital signal processing measurement methods to ensure
accurate, repeatable results.
Transmission Parameter Measurement Accuracy
The accuracy of the RF transmission performance measurements is
calculated in accordance with error models documented in related
TIA documents. OMNISCANNER is designed to significantly exceed Level
III accuracy requirements. The following tables provide typical
specifications for the intrinsic instrument parameters relating to the
measurement accuracy model and the calculated typical accuracy for
the basic link, permanent link and channel configurations.
Note
Refer to the TIA field tester specifications for a definition of the
accuracy model.
TABLE A1.1: INSTRUMENT INTRINSIC MEASUREMENT PARAMETERS
AS A FUNCTION OF MEASUREMENT CONFIGURATION
Parameter @ 100 MHz Basic Link Permanent Channel
(Baseline) Link
Residual NEXT 110 dB 100 dB 70 dB
Noise Floor 100 dB 100 dB 100 dB
NEXT Detector Accuracy 0.2 dB 0.3 dB 0.3 dB
Insertion Loss & ELFEXT
Detection Accuracy 0.4 dB 0.5 dB 0.5 dB
Residual FEXT 95 dB 85 dB 43 dB
Output Signal Balance 48 dB 43 dB 40 dB
Common Mode Rejection 48 dB 43 dB 40 dB
Source Load RL 25 dB 23 dB 20 dB
Directivity 44 dB 35 dB 35 dB
RL Tracking 0.1 dB 0.1 dB 0.1 dB
RL Source Match 45 dB 35 dB 30 dB
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