The Picotest VTS3 Demo Board contains eight individual circuit sections as identified in the table below. These circuits are typical in most distributed systems providing an excellent test bed for demonstrating non-invasive, in-system measurement, optimization and troubleshooting techniques.
VRTS3 Board Sections
| Section | Function |
| POL | 5V USB input to 3.3V 2.8MHz switching regulator |
| REF03 | 2.5V low noise voltage reference |
| OPAMP | 245MHz Bandwidth unity gain opamp buffer |
| LDO | LD1086 voltage regulator 5V USB input to 3.3V output |
| CLOCKS/BUFFERS | 10MHz and 125MHz clocks |
| CALIBRATION | Short-Open-Load and 1 Ohm calibration ports |
| PLANES & CAPS | Parallel tantalum and ceramic capacitor on a small PCB plane |
| MICROSTRIPS | 50O microstrips with precision aberrations - one with a ground void |
Supported Measurements
| TEST | SIGNAL INJECTORS NEEDED |
| 1 Port Impedance | DC Block |
| Output Impedance | See Impedance Table 2 |
| Bode Plot | J2100A or J2101A |
| Non-invasive Stability | See Impedance Table 2 |
| Switching Frequency | |
| Switch Rise Time | |
| Duty Cycle Jitter | |
| Noise | DC Block, 1 Port Probe, Preamp |
| PSRR | DC Block, J2120A, or J2111A |
| Step Load Response | J2111A or J2112A |
| Clock Jitter | |
| Clock Rise Time | |
| Jitter Sensitivity | DC Block |
| Power Supply Impedance | See Impedance Table 2 |
| Crosstalk | |
| Clock Buffer PDN Noise | DC Block |
| Clock Buffer Impedance | See Impedance Table 2 |
| Parallel Capacitor resonance | 1 Port Probe |
| Plane Impedance | 1 Port Probe |
| Velocity Factor and Er | |
| Trace Impedance | |
| Impedance of Broken Ground | |
| 2 port Shunt Thru Impedance | J2120A, 2 Port Probe, DC Block |
| Ripple | DC Block, Preamp |
| EMI | Near Field Probes |