1730D

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Features And Benefits

• Two Analog Composite Inputs
• Two Serial Digital Composite Inputs
• One Parallel Digital Composite Input
• Passive Loop-through for Serial Inputs
• Precision Analog Display of Digital Input
• Full Time DAC Output
• Serial Digital Bit Stream EYE Pattern Display
• Error Detection and Handling Display Mode (EDH)
• Displays VTR Servo Waveforms
• Menu Screens for Instrument Setups and Error Read-outs

Applications

• Baseband Monitoring of Analog and Digital Composite Video Signals

As the video environment moves toward digital video signal distribution, the need for signal monitoring is still prevalent. The 1730D digital waveform monitor meets this challenge with a variety of flexible digital and analog monitoring modes.

The 1730D functions as a standard waveform monitor with direct digital inputs for serial and parallel composite signals. Additionally, it has two analog inputs for composite video signals and input for an external reference.

Active Composite Parallel Loop-through

The 1730D provides a composite parallel input. This is a buffered, regenerating loop-through.

Full Time DAC Output

The 1730D also offers an analog output derived from a precision 10-Bit D to A Converter (DAC). This full time DAC output operates for the serial or parallel digital inputs.

Serial Digital Inputs with EYE Pattern Display

The 1730D offers the additional benefit of digital video testing via serial composite digital inputs. These wideband, high return loss loop-throughs allow the instrument to "tap" and monitor a 143 Mb/s Serial Composite Digital link. The 1730D also offers an EYE Pattern display of the serial input. This provides an indication of the analog performance of the digital channel. The EYE display is formed by equivalent time sampling. A wideband sample-and-hold takes "snap shots" of the data stream's voltage at particular instants in time and displays these values against a calibrated time axis. This allows observation of the amplitude, rise time and jitter of the serial bit stream. InterSymbol Interference (ISI) caused by bandwidth loss and improper cable termination is clearly seen, a useful tool when installing and troubleshooting serial systems.

Error Detection and Handling Display (EDH).

The 1730D includes a unique method for checking serial path integrity. This mode provides an error detection scheme when used with the Tektronix TSG170D digital video generator. The Error Detection and Handling (EDH) operation is based on the instrument calculating a check-word for the received digital video, then comparing this with the check-word sent from the generator. Further, in-service error rate monitoring is possible when used with picture sources that comply with SMPTE RP165.

Simultaneous Input Flexibility

Parallel digital or serial digital inputs can be paraded side by side with an analog input on the CRT's display.

The 1730D, when used with a 1720 Series Vectorscope, offers a complete solution to digital and analog video system testing and monitoring.