HP Wire Test Instrument, Technical Data Product Number 28687A The HP 28687A Wire Test Instrument verifies and troubleshoots twisted-pair cabling for Type 10BASE-T networks. It quickly performs the necessary tests to evaluate the key parameters specified by IEEE 802.3 to 10BASE-T standard: crosstalk attenuation, signal attenuation over frequency, burst noise, and continuity. The HP 28687A Wire Test Instrument is a result of HP's commitment and leadership role in the Type 10BASE-T arena, as well as HP's experience in the development of high-quality test instruments. "This full-function portable instrument gives you a better way to verify and troubleshoot twisted-pair LAN cabling." Features o Tests key parameters for Type 10BASE-T networks: crosstalk attenuation, signal attenuation over frequency, burst noise, and continuity. (Crosstalk attenuation and signal attenuation are measured using 5-MHz sine wave, 10-MHz sine wave and 10-Mbit/s pseudo random Manchester-encoded data.) o Evaluates both bundled 25-pair and individual 4-pair twisted-pair cabling. o To ensure reliability, the HP 28687A performs self-test and calibration during power on and recalibrates periodically during use. o Weighing less than 10 pounds, this portable unit can be easily carried to where you need it. o The Monitor function lets you take up to a 24-hour look at the cabling for identification of intermittent cabling problems. Data can be printed out as it is collected, or printed and reviewed at the end of the test period. o The 16-character alphanumeric display steps you through the test procedures and provides you with diagnostic information on each test performed for each twisted pair. o Prints out a hard copy of your test results by connecting to any printer which supports the standard RS-232 interface. o Easy-to-read LEDs indicate which pairs you have selected for testing, which tests you have selected, and which pairs passed or failed. o For quick wiring connections, the HP 28687A has a built-in 50-pin Telco connector and comes bundled with a 12-port modular adapter for 8-pin jack connections. Functional Description Complete Testing of Type 10BASE-T Cable Twisted-pair cable, unlike coaxial cable, allows for variations in physical characteristics and has dynamic performance requirements such as crosstalk, signal attenuation, and installation-dependent specifications. Tools developed for the telephone industry are not specialized to test for these specification requirements. The HP 28687A Wire Test Instrument can quickly identify problems in these areas. Designed specifically to verify compliance to the IEEE 802.3 10BASE-T standard, the HP 28687A Wire Test Instrument lets you easily verify and troubleshoot twisted-pair LAN cabling. Easy to Use This lightweight portable unit saves time by simplifying the complex task of testing twisted-pair cabling. Individual tests or combinations of tests can be run 3/4 5 LEDs indicate which tests you have selected. Up to 24 pairs (12 ports) can be tested simultaneously 3/4 LEDs indicate which pairs you have selected. The alphanumeric display steps you through the test procedures and gives you complete diagnostic information when you want it. An RS-232 printer port also allows you to print a hard copy of the results. Twelve green LEDs indicate whether the pairs have passed or failed the tests. Intermittent cabling problems can be identified by pushing the MONITOR button, which performs the selected tests for up to 24 hours. Troubleshooting and Verification Network downtime is expensive. While the costs of a downed network cannot always be quantified, daily business depends on a functional network. With the HP 28687A Wire Test Instrument, cable problems can be easily and quickly identified. To avoid intermittent problems and performance degradation problems, both new and in-place twisted-pair cabling should be evaluated prior to use as a LAN media. The HP 28687A Wire Test Instrument verifies the suitability of in-place twisted-pair cable for your Type 10BASE-T application before you install your network. Functional Specifications Physical Specifications Dimensions: Width: 27.9 cm (11.0 in) Depth: 34.3 cm (13.5 in) Height: 15.9 cm (6.3 in) Weight: 4.1 kg (9.0 lb) Environmental Specifications Environment Temperature: Operating: 0 degrees C to +55 degrees C (32 degrees F to 131 degrees F) Nonoperating: -40 degrees C to 70 degrees C (-40 degrees F to 158 degrees F) Relative Humidity: Operating: 5% to 95% at 40 degrees C (104 degrees F) noncondensing Nonoperating: 5% to 90% at 65 degrees C (149 degrees F) noncondensing Electrical Specifications At Nominal Maximum Maximum Frequency Voltage (ac) RMS Current RMS Power Range 100-120 volts 0.5 amp 30 watts 50-60 Hz 200-240 volts 0.3 amp 30 watts 50-60 Hz Maximum Input Voltage: Common Mode: 500 volts Differential Mode: 24 Volts at f < 60 Hz, 1.5 Volts at f > 60 Hz Measurement Specifications Measurement Range Accuracy Resolution Signal Attenuation 0-15 dB +/-0.5 dB 0.1 dB Crosstalk Attn 0-36 dB +/-1.0 dB 0.1 dB Burst Noise 232 mV minimum +/-32 mV Measurement made through a 3-pole Butterworth low-pass filter with a 3-dB cut off at 15 MHz. Source Characteristics: Frequency Range 5-MHz sine wave, 10-MHz sine wave, 10-Mbit/s pseudo random Manchester-encoded data Output Level Range 1.25 volts peak +/- 250 mV Impedance 100 ohms +/- 10 ohms Output connector 50-pin Telco connector Receiver Characteristics: Frequency Range 5 MHz to 15 MHz Input Level Range 20 mV peak to 1.5 volts peak Impedance 100 ohms +/- 10 ohms Input Connector 50-pin Telco connector Altitude Operating: 0-4.6 km (15,000 ft) Nonoperating: 0-15.3 km (50,000 ft) Approvals RFI (Radio Frequency Interference): FCC Class A, FTZ-1046/1984, CISPR-22 Class A, VCCI Class 1 Safety: CSA C22.2-220 for ITE. Compliance with UL 478, UL 1244, and IEC 348. Ordering Information The HP 28687A Wire Test Instrument includes an operating manual, 12 loopback hoods, one 12-port modular adapter, one test results pad and a power cord. Related Documents and Literature 5959-2208 HP SiteWire Twisted-pair Cabling Installation Guide 5090-2607 HP LAN Configuration Guide for IEEE 802.3 and Ethernet Networks 5090-2642 HP EtherTwist Network Startup Guide Warranty The HP 28687A Wire Test Instrument is warranted for 1 year against defects. Check with your local Hewlett-Packard Sales and Support Office for more information. Accuracy specified at 100-ohm line impedance. Technical information in this document is subject to change without notice. From HP Networking Communications Specifications Guide, 5091-3821E, 9205, p 673 Associated files: none HP Wire Test Instrument, Technical Data