EXFO MaxTester 635 - Manual (Página 184)

Especificaciones técnicas 177
COPPER SPECIFICATIONS a, b, c (continued)
VF noise measurement Frequency range 200 Hz to 20 kHz
Level range (dBm) –90 to 20
Resolution (dB) 0.1
Uncertainty (accuracy) –90 dBm to –50 dBm, uncertainty (accuracy) ±2 dB
–50 dBm to +20 dBm, uncertainty (accuracy) ±1 dB
Filters ITU: none, psophometric, P-notched, 3.4 kHz, D-filter, 15 kHz
ANSI: none, C-message, C-notched, 3.4 kHz, D-filter, 15 kHz
Impedance 600 1
VF impulse noise Low threshold (dBm) –40 to 0, in 1 dB steps
Mid threshold Low threshold plus separation
High threshold Mid threshold plus separation
Separation (dB) 1 to 6, in 1 dB steps
Dead time (ms) 125
Filters
None, 3 kHz flat, C-message, psophometric,
notched and D filter (IEEE 743-1995)
Counter Maximum 999 for each threshold
Timer 1 minute to 24 hours, default is 15 minutes
Power influence (noise to ground) Noise range (dBm) –60 to 10
Uncertainty (accuracy) –60 dBm to –50 dBm ± 2 dB
–50 dBm to 10 dBm ± 1 dB
VF longitudinal balance Frequency (Hz) 1004
Level range (dB) 0 to 100
Level uncertainty (accuracy) (dB) ±1
Impedance 600 1
Time-domain reflectometer (TDR) Modes Fully automatic operation with location of most significant event(s)
Distance range (m) 0 to 6700 (0 ft up to 22 000 ft)
Pulse width 15 ns to 20 μs
Test signals Sine wave, compensated sine wave, half-sine wave and square wave
Amplitude 7.5 V p-p on cable, 9 V p-p open circuit
Velocity of propagation (VOP) 0.400 to 0.999
Distance uncertainty (accuracy) d (m) ±(0.5 m + 1 % x distance)
Units Meters and feet
Load coil detection Count Up to 5
Plot (kHz) Up to 10
Distance range (m) Up to 8000 (up to 27 000 ft)
NOTES
a. Subject to change without notice.
b. Typical, at 23 °C ± 3 °C, on batteries, with no type B USB connection.
c. Specifications based on 24 AWG (PE 0.5 mm) cabling.
d. Qualified up to 300 m (1000 ft) and does not include the uncertainty due to VOP.