Maintenance and Specifications
Specifications
8
8-15
The tables in the sections that follow summarize the guidelines for computing
measurement accuracy for Level III field cable testers.
Attenuation (Insertion Loss)
Parameter Specification 100 MHz 250 MHz
Frequency Range 1 MHz to 350 MHz. Range is determined by
the selected test standard.
NA NA
Step sizes <31.4 MHz: 100 kHz
31.4 MHz to 100 MHz: 200 kHz
100 MHz to 350 MHz: 500 kHz
NA NA
Amplitude Range 0 dB to >40 dB NA NA
Resolution 0.1 dB NA NA
Dynamic Accuracy
(up to test limit + 3 dB)
±0.75 dB, 1 MHz to 250 MHz ± 0.75 dB ± 0.75 dB
Return Loss for
Baseline/Basic Link
20 - 12.5 log (f/100) dB, 1 MHz to 250 MHz;
20 dB maximum
20 dB 15 dB
Return Loss for
Permanent Link and
Channel
18 - 12.5 log (f/100) dB, 1 MHz to 250 MHz;
20 dB maximum
18 dB 13 dB
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