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{TVA92}

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As Low As $80 Per Month!

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TV/VCR/Camcorder

On GSA Contract

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Exclusive "TV OFF" horizontal output load test
Dynamic tests through a simple 3 lead hook-up to the horizontal output transistor

Horizontal output transistor sub and drive
Universal substitute TV signals

Patented Ringer Test to quickly pinpoint shorted turns in flybacks, IHVTs, yokes, and switching transformers
Built-in monitor for all sub-signal results and making DCV and PPV measurements

DC biasing supply
An exclusive yoke drive signal

* The TVA92 is a companion unit to the VG91 Universal Video Generator

TVA92 Condensed Specifications

Audio & Video Drives - SIGNALS: Audio, MTS Composite Audio, Video Chroma, V&H Sync, Vert Sync, Vert Drive, Horiz Drive, Horiz Key Pulse. OUTPUT: 0-300V in 3 ranges, Impedance <50 ohms.

Simultaneous Drive Signals - SIGNALS AVAILABLE: V&H Blanking (Sandcastle) & 3.58 MHz color oscillator. OUTPUT: 0-30V, Impedance <50 ohms.

Vertical Yoke Drive - LINEAR CURRENT OUTPUT: 0-1.5 Amp peak. EXTERNAL VOLTS PROTECTION: ±500 Volts (DC + Peak AC).

Horizontal Output Load Test - FUNCTION: Tests the horizontal output/flyback circuit by applying 15V B+ source, exciting drive to the flyback primary, and metering the B+ current and flyback pulse time. VOLTAGE APPLIED: 15 VDC ±.5 volts, current limited to 250 mA. PROTECTION: Diode and fuse protected.

Ringing Test - FUNCTION: Approximate tests of coil "Q" determined by applying an exciting pulse and counting the ringing cycles before reaching a preset damping level. ACCURACY: ±1 count on readings between 8 and 13 rings. EXCITING PULSE: 5 VPP, 60 Hz.

Horizontal Output Dynamic Measurements - All tests are done with a simple 3 lead hook-up to H.O.T. DCV RANGE: 0 to +199V. RESOLUTION: 0.1 volts 0 to 99.9V; 1 volt 100 to 199V. PULSE PPV RANGE: Autoranged, 0-1500 VPP. PULSE PPV ACCURACY: < 2%, ±2 counts at 1 kHz. PULSE TIME RANGE: 0-50.0 µS. PULSE TIME ACCURACY: 1%, ±2 counts.INPUT DRIVE FUNCTION: Monitors base lead to horizontal output and indicates if drive is present. INPUT DRIVE RESPONSE TIME: Immediate display updates with status change. INPUT DRIVE PROTECTION: 2,000V (DC + Peak AC) across inputs; 1500V (DC + Peak AC) from "-" terminal to ground.

Horizontal Output Device Sub & Drive - FUNCTION: Substitutes for the horizontal output transistor by switching the collector terminal to ground at 15,734 Hz rate and completing the flyback primary and yoke current paths. Current source is the chassis B+ power supply. SUB CONTROL "OFF": Permits normal chassis operation. CURRENT RANGE: Variable, 0-1.5 amps. Controlled by conduction time of transistor.

DC Bias Supply - RANGE: 0-30 Volts, ±1 volt, current limited to 1 amp. CURRENT SINK CAPABILITY: 250 mA from external voltage source.

Output Signal Monitor/DVM - DCV RANGES: Autoranged, 0-1999 volts. DCV
ACCURACY: <.5%, ±2 counts. DC BIAS mA: Autoranged, 0-1000 mA < 1%, ± 2 counts. PPV RANGE & ACCURACY: Autoranged, 0-1999 VPP < 2%, ± 2 counts.

General - AC POWER: 105-125 VAC 60 Hz. Power switched with generator. SIZE: 7" x 14" x 16.7" HWD (17.9 x 35.8 x 42.5 cm). WEIGHT: Approximately 20 lbs.

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