The Keysight (Agilent/HP) 3784A is a high-performance Bit Error Rate (BER) and jitter test set designed for manufacturing, commissioning, and maintenance of telecommunication networks and equipment operating at CEPT interface rates (704 kb/s, 2, 8, and 34 Mb/s). Featuring a built-in synthesized clock source, TTL/ECL binary interfaces for versatile BER testing from 1 kb/s to 50 Mb/s, and options for 64 kb/s codirectional and jitter interfaces, it delivers robust automated testing of jitter tolerance, jitter transfer functions, and comprehensive error analysis.
Specifications
General
| Parameter | Value |
|---|---|
| Display | CRT display |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 / 120 / 220 / 240 V AC, 48 to 66 Hz |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 425 mm × 188 mm × 530 mm |
| Weight | 19 kg |
Receiver and Transmitter Interfaces
| Parameter | Value |
|---|---|
| Supported CEPT Bit Rates | 704 kb/s, 2 Mb/s (2.048 Mb/s), 8 Mb/s (8.448 Mb/s) |
| General-Purpose BER Rate Range | 1 kb/s to 50 Mb/s |
| Binary Interfaces | TTL, ECL |
| Optional Interfaces | 64 kb/s codirectional interface (Option 002) |
Clocking and Synchronization
| Parameter | Value |
|---|---|
| Clock Source Type | Internal synthesized clock source |
Error Insertion and Measurement
| Parameter | Value |
|---|---|
| Error Analysis Parameters | Error count, error ratio, error and error-free intervals (seconds or deciseconds), % unavailability, % errored seconds, % severely errored seconds, % degraded minutes |
| Measurement Mode | Simultaneous measurement of all error analysis parameters |
Jitter and Wander Measurements
| Parameter | Value |
|---|---|
| Jitter Measurement Parameters | Peak-to-peak amplitude, jitter hit count, jitter hit and hit-free intervals (seconds or deciseconds) |
| Automated Jitter Measurements | Fully automated jitter tolerance and transfer function measurements (up to and beyond CCITT limits) |
| Through-Data Jitter Modulation | Supported (adds jitter to a fully-framed test signal passing through) |
| Jitter and Error Correlation | Correlation of jitter hits with error bursts |
Framing and Overhead Analysis
| Parameter | Value |
|---|---|
| In-Service Monitoring | Line code error detection for monitoring in-service performance |
System Control and Connectivity
| Parameter | Value |
|---|---|
| Results Logging | Unattended long-term measurement logging to external printer |
| Ease-of-Use Features | Measurement presets, automatic receiver set-up, pass/fail thresholds |
Receiver Specifications
| Parameter | Value |
|---|---|
| Receiver Input Impedance | 75 Ω unbalanced (BNC), 120 Ω balanced (Siemens 3-pin) |
Transmitter Specifications
| Parameter | Value |
|---|---|
| Transmitter Output Impedance | 75 Ω unbalanced (BNC), 120 Ω balanced (Siemens 3-pin) |
| Line Coding | HDB3, AMI |
| Internal Clock Accuracy | ±10 ppm |
Test Patterns
| Parameter | Value |
|---|---|
| PRBS Test Patterns | 2^9-1, 2^11-1, 2^15-1, 2^20-1, 2^23-1 |
Jitter Generator
| Parameter | Value |
|---|---|
| Jitter Modulation Sources | Internal synthesizer, external input |
Transmitter
| Parameter | Value |
|---|---|
| Transmitter Clock Offset | ±50 ppm in 1 ppm steps |
Receiver
| Parameter | Value |
|---|---|
| Receiver Input Modes | Terminate, Monitor, Protected Monitor |
Transmitter / Error Generation
| Parameter | Value |
|---|---|
| Error Insertion Rates | Single, 1E-3, 1E-4, 1E-5, 1E-6, 1E-7 |
| Error Insertion Types | Bit, Code (bipolar violation) |
Compliance
| Parameter | Value |
|---|---|
| Standards Compliance | ITU-T G.703, G.821, G.823, O.171 |
Options
| Parameter | Value |
|---|---|
| Option 001 | Adds 704 kb/s operating rate |
Technology
Bit Error Rate & Jitter Testing
Applications
Commissioning, manufacturing, and maintenance of CEPT telecom network equipment
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