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E1 testing
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Connectors
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- Port A: Unbalanced (BNC) 75 W and balanced (RJ-45) 120 W
- Port B: Balanced (RJ-45) 120 W
- Port C: Unbalanced (BNC) 75 W Analogue voice frequency audio port
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Line
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- Connection modes: E1 monitor, E1 endpoint, E1 mux, E1 demux, E1 through, G.703 / E0 endpoint, analogue
- Bidirectional testing (E1 monitor, E1 endpoint, E1 through) by simultaneous operation of Port A and Port B
- Configurable input impedance: nominal line impedance, PMP 20 dB, PMP 25 dB, PMP 30 dB, high impedance (> 1000 W)
- Configurable output frequency offset within ±25,000 ppm around the nominal frequency
- Line codes: HDB3, AMI; Input Level: From 0 dB to -45 dB; Pulse mask compliance: ITU-T G.703; Jitter compliance: ITU-T G.823
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Frame
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- 2048 kb/s unframed, ITU-T G.704, ITU-T G.704 CRC, ITU-T G.704 CAS, ITU-T G.704 CRC + CAS
- Generation of custom NFAS spare bits (ITU-T G.704 frame with CRC-4 multiframe)
- CAS A, B, C, D bit generation for each voice channel. Generation of CAS multiframe spare bits (ITU-T G.704 frame with CAS multiframe)
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Patterns
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- PRBS 9 (O.150, O.153), PRBS 11 (O.150, O.152, O.153), PRBS 15 (O.150, O.151), PRBS 20 (O.150, O.153), PRBS 23 (O.150, O.151),PRBS 9 inverted, PRBS 11 inverted, PRBS 15 inverted, PRBS 20 inverted, PRBS 23 inverted, all 0, all 1; User configurable 32 bit word
- Tone (10 Hz to 4000 Hz, +6 dBm to -60 dBm); External signal: Analogue, 64 kb/s G.703 / E0(AT-2048 only), Datacom interface
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Analysis
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- Analogue: Attenuation (dB), freq. (Hz), freq. deviation (ppm), round trip delay (ms). Results include pass / fail indications
- Anomalies & Defects: LOS, LOF, AIS, RAI, CRC-LOM, CAS-LOM, MAIS, MRAI, LSS, All 0, All 1, Code, FAS, CRC, REBE, MFAS, TSE, Slip
- Live and history LEDs for all Defects and Anomalies
- ITU-T G.821, G.826 and M.2100 performance results include Near / Far-end statistics, PASS / FAIL indications
- ITU-T G.711 occupation map and time slot analysis: maximum code, minimum code, average code, time slot level and frequency
- CAS A, B, C, D bit analysis; Drop to external output: Analogue, 64 kb/s codirectional (Port A only), data communications interface
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Events
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- Physical: AIS, LOS; Frame: FAS, CRC, MFAS, REBE, LOF, MAIS, CAS-LOM, RAI, MRAI, CRC-LOM; Pattern: TSE, Slip, LSS, All 0, All 1
- Insertion modes: Single (anomalies), rate (anomalies), continuous (defects), burst of M (defects), M out of N (defects)
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Pulse Mask
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- Measurement of pulse width, rise time, fall time, level, overshoot and undershoot (positive and negative pulses)
- Operation modes: Eye diagram or continuous run; Pass / Fail indication for compliance with ITU-T G.703 E1 mask
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Jitter & Wander
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Generation
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- Waveform: sinusoidal; Freq. range: 1 mHz to 100 kHz; Resolution: 0.1 Hz (jitter), 1 mHz (wander)
- Amplitude: 0 – 1000 Uipp Max. depends on Freq.; Resolution: 1 mUIpp or 1/104 configured value; Accuracy: better than O.172
- Smooth amplitude changes in jitter range (10 Hz – 100 kHz); Intrinsic jitter < 10 mUIpp
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Jitter Analysis
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- Freq range: 0.1Hz to 100kHz (locking time 10s), 1Hz to 100kHz (locking time 1s), 10Hz to 100kHz (locking time < 1s)
- Amplitude: 0 to 1000 UIpp (single range) (max. depends on modulation Freq.); Resolution: 1 mUIpp; Accuracy: better than ITU-T O.172
- Results: peak to peak jitter, RMS jitter, maximum jitter (user reseteable), hits detection and count (user selectable threshold)
- Filters: LP (f < 100 kHz), LP+HP1 (20 Hz < f < 100 kHz), LP+HP2 (18 kHz < f < 100 kHz), LP+RMS (12 kHz < f < 100 kHz)
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Wander Analysis
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- Open loop measurement method. Reference freq. required; Modulation Freq. range: 1 mHz to 10 Hz; Sampling: 50 Hz
- Modulation amplitude: 0 to ±2 s (single range); Accuracy: 2 ns
- Instantaneous: TIE, freq. offset & drift; Built-in & real-time Statistics: TIE, MTIE, TDEV; Statistics range: 102, 103, 104, 105, 106 s
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Datacom
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Interfaces
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- V.24/V.28 asynchronous/synchronous (RS-232) from 50 b/s to 128 kb/s
- X.21/V.11, V.35, V.36 (RS-449), EIA-530 from 50 b/s to 2048 kb/s
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Operation
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- Test pattern generation and analysis over a datacom interfaces
- Defects/ Anomalies: LOC, AIS, LSS, All 0, All 1, TSE, Slip; Analogue: Line attenuation (dB), Freq. (Hz), Freq. deviation (ppm)
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Miscellaneous
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E0/nx64
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- Balanced (RJ-45) 120 W; Clock ITU-T G.703 contradirectional and centralized
- Bit rate N x 64 kb/s; Test pattern generation and analysis over co-directional interfaces
- Anomalies and Defect insertion and analysis: LOS, AIS, LSS, All 0, All 1, TSE, Slip
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Frame Relay
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- Interfaces: X.21/V.11, V.35, V.36 (RS-449); EIA-530 / EIA-530A from 50 b/s to 2048 kb/s
- Settings: DLCI, Events, Long frames, short frames, Alignment errors, FCS errors, Frame abort count
- Statistics: Bandwidth, Maximum and minimum frame size; Frames with FECN, BECN and DE; Active DLCI list, LMI frame count
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Analogue
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- Tone Generation (from 10 Hz to 4000 Hz, from 0 dBm to -60 dBm); Level and Freq.
- ITU-T G.711 analysis: maximum code, minimum code, average code.
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Synchronization
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- Internal clock reference; External reference clock: 2,048 kb/s (ITU-T G.703), 2,048 kHz; Configurable input gain: 0 dB, -20 dB
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Platform
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Instrument
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- Touchscreen 480 x 272 TFT, Mouse, USB & Ethernet ports; SNMP, VNC support; Soft LEDS, 1 kg, 223 x 144 x 65mm; IP-54
- Rechargeable Batteries continuous working up to 24 hours
- Operating 0ºC ~ 50º C Storage -20ºC ~ 70ºC; Humidity 5% ~ 95%
- All events at a glance: 2xLEDS executing logical OR and Multiple Soft LEDS in screen
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