Telecom and datacom measurementsTelecom measurements

All measurements are simultaneous.

Errors

At 2048 kb/s have error count, average error ratio, error free seconds, % error free seconds of: bit (64 and 2048 kb/s), code, frame bit, CRC4, REBE (remote end block error – E bits).

ITU-T M.2100 analysis

ES, SES and availability for maintenance monitoring of transmit and receive directions. Receive only for out-of-service testing (includes PRBS defects and anomalies).

ITU-T G.821 error analysis

SES, %SES, ES, %ES, UAV and %UAV (telecom only), percent availability (datacom only), US, DM, %DM, long term mean error ratio. Also G.821 Annex D and user-defined thresholds.

Alarms

Alarm seconds and LED display of: AIS, LOS, LOF, CAS MFM loss, CRC4 MFM loss, remote alarm, remote MFM alarm, pattern sync loss, octet loss, power loss.

Frequency

Range: 0 to 9 MHz.

Resolution: 1 Hz.

Slips and COFAs

Number of pattern slips in available time and changes of frame alignment (COFA) are detected and counted.

Round trip delay

For 223 − 1 PRBS at 2 Mb/s.

Range: 0 to 1023 ms ± 3% (nominal).

Resolution: 1 ∝ s.

Datacom measurements

All measurements are simultaneous.

Errors

Bit error count/ratio, block count (the block length

can be either 103 bits or PRBS length), block error count/ratio, asynchronous ES, %EFS, clock slips.

ITU-T M.2100 analysis

As for telecom measurements.

ITU-T G.821 error analysis

As for telecom measurements.

Alarms

Alarm seconds and LED display of: data loss, power loss, pattern sync loss, clock slip.

Frequency (synchronous mode only)

Range: 0 to 2.048 MHz.

Resolution: 1 Hz.

Control-circuit timing analysis

Graphic display of the status of control circuits RTS, CTS, DTR, DSR, DCD and Mon (monitor in V.24 mode only).

Delay

Between user-defined start and stop events.

Start and stop events: Transitions of RTS, CTS, DTR, DSR, DCD and Mon (user-connected monitor point for V.24 only). Ranges: 100 ms, 1 s, 10 s.

Resolution: 0.1 ms up to 1 s, 1 ms above 1 s.

Specifications common to the HP 37722A and 37732A analyzers

Graphics and printing

Graphic display and printout

Barchart (results v 1920 time periods) for current or stored measurement period. Showing, for telecom: bit error count, code error count, frame error count, CRC error count, REBE (remote end block error – E-bits) error count, M2100 ES, SES count, alarms;

or datacom, any of: bit error count, block error count, alarms. Bar resolution: 1, 15, 60 minutes.

Printer and remote control Connector: 25-pin femaleRS-232-C.

Printing: Results, time, date and instrument control settings to external printer.

Remote control: Full duplex RS-232 control via a terminal or a computer.

Results and settings storage

Internal results storage

Automatic, for up to 10 periods with a maximum of 80 days capacity or total capacity of approximately 5,000 events. Data retained when instrument switched off.

Results stored at end of measurement period

Telecom and datacom error results, ITU-T G.821/M.2100 error analysis, alarm seconds.

Instrument settings storage

All current settings and results saved when the instrument switched off. In addition, up to five complete telecom and five complete datacom setups, with names, stored for recall.

General

Dimensions mm (inch): 190 (7.5) high, 340 (13.4) wide, 208

(8.2) deep including front panel cover or datacom module. Weight: HP 37722A 4.5 kg (10 lb); HP 37732A 5.9 kg (12.5 lb).

ac Supply: 90 to 260 V, 60 VA, 48 to 66 Hz.Temperature: 0 to + 50°C operating, − 40 to + 70°C storage.

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