agilent N4906A serial bert 3.6 gb/s bit error ratio t ester t echnical specifications general features i n ternal hard disk for local storage of user patterns and data removable storage ms-dos ? compatible 3.5 superdrive (accepts 1.4 mbyte hd disks & 120 mbyte superdisks ? ) data entry touch-sensitive display, numeric keypad with up/ down arrows, analogue feel position controls, or provided usb keyboard and mouse if desired. display internal 8 (diagonal) backlit lcd touch-screen interfaces gpib (ieee 488), lan (10 base t ethernet) for printing and file transfer, parallel/centronics printer por t, external vga output. on-line help context-sensitive on-line help is included. operation, programming and quick-start guides are also included and supplied on ms-windows ? compatible cd-rom. accessories supplied usb compatible keyboard; mouse; stylus; quick start manual on paper; quick start card. ms-windows ? compatible cd-rom containing pdf files of operating, quick-start, and programming guides. power cord; 6x apc-3.5 connector savers (female to female); 6x 50 ? apc-3.5 (male) terminations, 3x 1 metre sma (male to male) cables.
2 pattern generator pattern generator parameters operating frequency operating frequency 50 mhz to 3.6 ghz with external clock (optional) 50 mhz to 3.0 ghz with internal clock source internal clock source frequency range 50 mhz to 3.0 ghz frequency accuracy 20 ppm test patterns 2 n -1 prbs 2 31 -1, 2 23 -1, 2 15 -1, 2 10 -1, 2 7 -1 2 n prbs 2 23 , 2 15 , 2 10 , 2 7 variable mark density 1/8, 1/4, 1/2, 3/4, 7/8 user defined patterns variable length patterns from 1 to 8 mbits alternating patterns change between two equal length user patterns, each up to 4 mbits long. changeover is synchronous with the end of a pattern, under the control of the front panel or the auxiliary input. error add single, continuously variable between 1x10 C2 and 1x10 C9 , and user specified bursts of errors. pattern editor fully flexible pattern editor included with cut, copy and paste functions.
3 pattern generator input/output specifications data and data outputs data and data outputs are independently settable format: nrz polarity: normal or inverted amplitude: 0.5 to 2 v in 10 mv steps offset: see figure below. 10 mv resolution. data outputs on/off: off goes to high impedance state supported terminations: 0 v (lvttl, scfl, etc.), C2 v (ecl), +1.3 v (3.3 v pecl), ac-coupled jitter (pk-pk): < 20 ps, < 12 ps typical (w/internal source) transition time (10C90%): < 42 ps, < 30 ps typical (25c) variable crossover: supported clock/data delay range: 0C1 bit period or 10 ns, whichever is less. 1 ps resolution. interface: dc-coupled 50 ? reverse terminated, apc-3.5 connector clock and clock outputs clock and clock outputs are independently settable amplitude: 0.5 to 2 v in 10 mv steps offset: see figure below. 10 mv resolution. clock outputs on/off: off goes to high impedance state supported terminations: 0 v (lvttl, scfl, etc.), C2 v (ecl), +1.3 v (3.3 v pecl), ac-coupled transition time (10C90%): < 42 ps, < 35 ps typical (25c, 3 ghz) interface: dc-coupled 50 ? reverse terminated, apc-3.5 connector intrinsic clock to data delay is constant at all frequencies. auxiliary input this has two functions. 1. blanks the data outputs to allow the user to create bursts of data 2. if in alternating pattern mode, used to change between a and b patterns minimum pulse width: 128 clock periods interface: ttl compatible, 50 ? bnc female connector clock input allows connection of an external clock source in order to extend the operating range of the instrument. recommended clock sources are the agilent e4422b and the 83752a. frequency range: 50 mhz to 3.6 ghz amplitude range: +3 dbm to C3 dbm interface: sma female 50 ? , dc coupled to 0 v error add input this allows injection of single errors by an external pulse generator into the transmitted test pattern synchronous with t he rising edge of the pulse minimum pulse width: 128 clock periods interface: ttl compatible, 50 ? bnc female connector trigger output provides a pulse to trigger a communication analyzer etc. it has two modes: 1. divided clock mode: pulses at 1/8th of the clock rate. 2. pattern mode: pulse at a settable bit position within the pattern. min.pulse width: (pattern mode) 64 bits output levels: high C0.3 v, low C0.8 v interface: 50 ? sma female data/data/clock/clock amplitudes and offsets 0.5 min to 2 v max termination: maximum high level: or minimum low level: ? v 0 v ? v 0 v 2.5 v ? v +1.3 v 2.5 v ? v
4 error detector error detector parameters operating frequency 50 mhz to 3.6 ghz. test patterns as specified for pattern generator auto-align includes synchronizing, data polarity, clock/data align, clock invert, 0/1 threshold center. data in delay manual data in delay/auto clock-data align threshold setting manual set, average dc level set, auto 0/1 center synchronization manual, automatic, burst, capture. sync threshold adjustable from 10 C1 to 10 C9 . results accumulated measurements may be run once, repetitively or manual start/stop. delta (instantaneous) ber always available. accumulation time accumulate for periods from 1 second to 100 days errors until at least 10/100/1000 errors bits 10e 7 to 10e 15 bits results are logged periodically to the hard disk for later export (in csv format) and analysis in a pc spreadsheet program. result displays results are displayed under the following headings. delta ber results delta error ratio, delta error count, graph of ber vs time accumulated results bit count, error ratio, error count, errored one count, errored zero count, error free seconds, errored seconds, elapsed accumulation time, sync loss seconds, power loss seconds, graph vs time burst mode results burst duty cycle, burst sync ratio, total burst count, bad burst count eye results eye width, eye height, eye voltage center value, eye time center value, delta error ratio at eye center on completion of autoalign audible error indicator selectable to indicate isolated errors, delta error ratio, errors above user-defined threshold. on/off volume control. audible pitch changes, with higher pitch corresponding to higher ber.
5 error detector input/output specifications data input polarity: normal or inverted input amplitude: 0.1 to 2 v (typical) threshold range: +3 to C3 v threshold resolution: 0.5 mv terminations: via 50 ? to C2 v, 0 v, +1.3 v data input delay range: 0C1 bit period, or 10 ns whichever is less. 1 ps resolution interface: dc-coupled 50 ? , apc-3.5 female connector clock input clock input functionsswitchable termination voltages, input frequency measurement, clock invert. bit rate: 50 mhz to 3.6 ghz data sampling clock edge: selectable rising or falling input amplitude: 0.2 to 2 v (typical) terminations: via 50 ? to C2 v, 0 v, +1.3 v interface: dc-coupled 50 ? , apc-3.5 female gating input this is used to inhibit error counting minimum pulse width: 128 clock periods interface: ttl compatible, bnc female connector error output provides a pulse if one or more errors have been detect ed within the preceding 128 bit block. pulse width: 64 bits output levels: high +2.4 v, low +0.4 v interface: dc-coupled, reverse terminated bnc female connector trigger output provides a pulse to trigger a communication analyzer etc. it has two modes: 1. divided clock mode: pulses at 1/8th of the clock rate. 2. pattern mode: pulse at a fixed bit position within the pattern. pulse width (pattern mode): 64 bits output levels: high C0.3v, low C0.8 v interface: 50 ? sma female
6 external parameters environmental warm-up time 30 minutes operating temperature range to specification 10 to 45 c humidity 15 to 95% at 45 c non-condensing electrical supply voltage parameters 90 vC250 v ac, 50C60 hz power consumption < 300 w emc eu emc directive (ce-marked) support warranty 1 year calibration 2 year cycle, return to agilent technologies physical dimensions 426 w x 215 h x 527 d mm approx (16.8 w x 8.5 h x 20.7 d approx) weight 23 kg (50 lbs) 527 mm 426 mm 215 mm
7 ordering information ? N4906A serial bert serial bert 3 gb/s (f or 3.0 gbit/s ber measurement and analysis with internal clock source, 3.6 gbit/s with external clock source) ? clock source add e4422b 4.0 ghz external synthesized signal source ? option N4906A-0b1 hard copy programming manuals ? option N4906A-ax4 mounting kit for 19 rack, without handles ? option N4906A-axe mounting kit for 19 rack, including front handles recommended product accessories torque wrench: ? 8710-1765 for apc 3.5 connectors cable: ? 8120-4948 1m sma cable blocking capacitor: ? 11742a 45 mhz to 26.5 ghz, apc-3.5 mm bias network: ? 11612a 45 mhz to 26.5 ghz, apc-3.5 mm attenuators: ? option 8493c-003 3 db apc 3.5 pad ? option 8493c-006 6 db apc 3.5 pad ? option 8493c-010 10 db apc 3.5 pad ? option 8493c-020 20 db apc 3.5 pad transition time convertors: used to slow the output waveform rise/fall times if desired. sma male to sma female connectors. ? 15435a 150 ps output transition time ? 15432b 250 ps output transition time ? 15433b 500 ps output transition time ? 15434b 1000 ps output transition time ? 15438a 2000 ps output transition time superdisk is a trademark of imation corp. ms-dos and ms-windows are u.s. registered trademarks of microsoft corporation.
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