Technical Specifications
Copper, VDSL2, ADSL2+, and IP Triple-Play Test Set
249
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NOTE
a. At 23 °C ± 1 °C on batteries, unless otherwise specified.
b. Characteristics are subject to instrument noise floor (approx.
–
70 dBm). Levels below
–
70 dBm can be measured using the PSD noise test.
c. Does not include the uncertainty due to VOP.
RECEIVER CHARACTERISTICS
b
Receive frequency
200 Hz to 10 kHz, resolution 1 Hz
Receive frequency
10 kHz to 20 kHz, resolution 10 Hz
Receive frequency
20 kHz to 30 MHz, resolution 1 kHz
Frequency uncertainty (accuracy)
±0.1 %
Receive level (dBm)
–90 to +10 at 100
Ω
or 135
Ω
, resolution 0.1 dB
–100 to +10 at 600
Ω
, resolution 0.1 dB
Level uncertainty (accuracy)
±1.0 dB for 200 Hz to 20 kHz at 0 dBm
±1.0 dB for 20 kHz to 30 MHz at 0 dBm
Impedance (
Ω
)
100, 135, 600 and bridging (100 k
Ω
)
TRANSMITTER CHARACTERISTICS
Transmit frequency
200 Hz to 20 kHz, resolution 1 Hz steps
Transmit frequency
20 kHz to 30 MHz, resolution 1 kHz steps
Transmit level (dBm)
–10 to +10 at 100
or 135
–20 to +10 at 600
Frequency uncertainty (accuracy)
The better of ±50 ppm or ±0.5 Hz
Level uncertainty (accuracy)
±0.6 dB
200 Hz to 1 MHz
±1 dB
1 MHz to 2.2 MHz
±2 dB
2.2 MHz to 17 MHz
±3 dB
17 MHz to 30 MHz
Impedance (
Ω
)
100, 135 and 600
VF NOISE MEASUREMENT
Range (dBm)
0 to –90, subject to instrument noise floor
Uncertainty (accuracy) (dB)
±1
Filters
None, 3 kHz flat, C-message, psophometric, notched and D filter (IEEE 743-1995)
Graphic results
Delay distribution and jitter histogram
VF IMPULSE NOISE
Low threshold (dBm)
0 to –40, 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) (dB)
±1.0
Level uncertainty (accuracy) (dB)
±1.0 at –60 dBm
VF LONGITUDINAL BALANCE
Frequency (Hz)
1004
Frequency uncertainty (accuracy)
±50 ppm
Level range (dB)
0 to 80
Level uncertainty (accuracy) (dB)
±1
TIME-DOMAIN REFLECTOMETRY (TDR)
Mode
One shot, continuous (auto-repeat) with cursor and zoom
Distance range (m)
8 to 6000 (25 ft up to 20 000 ft)
Pulse width
15 ns to 20
µ
s (auto-selected in auto TDR test)
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 or 120 m/
µ
s to 299 m/
µ
s
Distance uncertainty
c
(accuracy) (m)
±(1.4 m + 2 % x distance) or ±(4.5 ft + 2 % x distance)
Units
Feet and meters
Horizontal scale (m)
Automatic or 30 (100 ft), 300 (1000 ft), 600 (2000 ft), 1500 (5000 ft), 3000 (10 000 ft), 6000 (20 000 ft),
13 500 (45 000 ft) and 15 000 (50 000 ft)
FREQUENCY-DOMAIN REFLECTOMETRY (FDR)
Distance range (m)
1.5 to 5000 (5 ft to 18 000 ft)
Velocity of propagation (VOP)
0.400 to 0.999 or 120 m/
µ
s to 299 m/
µ
s
Distance uncertainty (accuracy) (m)
±(3, 3 to 1000) ±(15, 1000 to 1500) ±(30, 1500 to 5000)
Units
Feet and meters
LOAD COIL DETECTION
Count
Five
Plot (kHz)
Up to 10
Distance range (m)
Up to 8000 (up to 27 000 ft)
SINGLE-END FREQUENCY RESPONSE (ATTENUATION)
Distance range (m)
12 to 5000 (40 ft to 16 000 ft)
Frequency range
4.3 kHz to 30 MHz
Frequency uncertainty (accuracy)
±50 ppm
Level uncertainty (accuracy) (dB)
2 dB, 4 dB at 30 MHz
Resolution (dB)
0.1
Horizontal scale (MHz)
ADSL2+ = 2.208, VDSL2-12 = 12, VDSL2-17 = 17.66, VDSL2-30 = 30
Vertical scale (dB)
0 to +100
