The 7851TG2-3G is a dual multi-format Test Generator. It provides a cost-effective method of generating 3Gb/s, 1.5Gb/s HD-SDI and 270Mb/s SD-SDI test signals. The 7851TG2-3G is ideal for checking signal path integrity, or to determine system performance over varying cable lengths. The 7851TG2-3G generates test signals in a wide variety of SMPTE 424M, SMPTE 292M and SMPTE 259M video formats. These formats include SMPTE 274M (1920x1080), SMPTE 296M (720p), SMPTE 372M (Dual Link HD), and SMPTE 425M level A and level B. This also includes 4:2:2/4:4:4 sample structure, YCbCr and RGB color space and definitions for 10/12 bit depths.
The dual on-board test signal generators can be independently controlled providing test signals for two purposes simultaneously.
Test Generator # 1 (TG1) has 4 outputs and can generate:
- 4 outputs of the same 3G, HD, or SD-SDI test pattern OR
- 2 outputs of the same Dual Link HD-SDI (SMPTE 372M) test pattern
Test Generator #2 (TG2) has 2 outputs and can generate:
- 2 outputs of the same 3G, HD, or SD-SDI test pattern OR
- 1 output of the same Dual Link HD-SDI (SMPTE 372M) test pattern
The 7851TG2-3G can be configured via dedicated on-screen menu and is also VistaLINK® capable, offering remote monitoring, control and configuration capabilities via Simple Network Management Protocol (SNMP) giving the flexibility to manage operations, including signal monitoring and module configuration from SNMP capable control systems (Manager or NMS).
Features
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Specifications
| Gen Lock Input | |
|---|---|
| Type | Menu selectable - depends on output video format HD Tri-level Sync NTSC or PAL Color Black 1V p-p Composite Bi-level sync (525i or 625i) 286/300mV |
| Connector | BNC per IEC 61169-8 Annex A |
| Termination | 75Ω (jumper selectable) |
| Serial Video Outputs | |
|---|---|
| Standard | |
| 3G | SMPTE 425M Level A and B |
| HD-SDI | SMPTE 292M, 4:2:2 YCbCr (single link) SMPTE 372M (dual link) |
| SD-SDI | SMPTE 259M-C |
| Number of Outputs | |
| TSG 1 | 4 |
| TSG 2 | 2 |
| Embedded Audio | Up to 4 groups of audio (4 channels in one audio group) as specified in SMPTE 299M Selectable tone frequencies (from 60Hz to 10kHz) and audio level control |
| Connectors | BNC per IEC 61169-8 Annex A |
| Signal Level | 800mV nominal |
| V Phasing | Infinite lines |
| H Phasing | Infinite samples |
| DC Offset | 0V ±0.5V |
| Rise & Fall Time | 200ps nominal |
| Overshoot | < 10% of amplitude |
| Wide Band Jitter | < 0.2UI HD < 0.3UI 3G |
| Electrical | |
|---|---|
| Voltage | +12V DC |
| Power | 15 Watts |
| EMI/RFI | Complies with FCC Part 15, Class A EU EMC Directive |
| Physical | |
|---|---|
| Number of slots | |
| 350FR | 2 |
| 7700FR-C | 2 |
| 7800FR | 1 |
Ordering Information
| 7851TG2-3G | 3G/HD/SD-SDI Advanced Dual Test Signal Generator |
|---|
| Ordering Options | |
|---|---|
| Notes | • Rear plate must be specified at time of order - eg: [model]+3RU |
| Rear Plate Suffix | |
|---|---|
| +3RU | 3RU rear plate for use with 7800FR, 7801FR, 7700FR-C or 350FR Multiframes |
| Enclosures | |
|---|---|
| 350FR | Portable Multiframe which holds 7 modules |
| 7700FR-C | 3RU Multiframe which holds 15 modules |
| 7800FR | 3RU Multiframe which holds 15 modules |




