1720 Series Vectorscope Characteristics

Signal Input (Video and External Reference)

Return Loss - >40 dB, 50 kHz to 6 MHz, power on or off.

Maximum Input - ±5 V DC + peak AC.

Loop-through Isolation - >70 dB at F_SC.

Channel Isolation - >70 dB at F_SC.

Impedance - >15 kilohm.

Chrominance Bandwidth

Upper - -3 dB point, F_SC +500 kHz, ±100 kHz.

Lower - -3 dB point, F_SC -500 kHz, ±100 kHz.

Vector Phase Accuracy - Within 1.25°.

Vector Gain Accuracy - Within 2.5%, typical.

Quadrature Phasing - Within 0.5°, typical.

Subcarrier Regenerator

Pull-in Range - F_SC ±50 Hz.

Pull-in Time - Within 1 second.

Phase Shift with Subcarrier Frequency Change - 2° ±50 Hz.

Phase Shift with Burst Amplitude Change - < 2° with ±6 dB change from nominal.

Phase Shift with Input Channel Change - < 0.5°.

Phase Change with Variable Gain Control - ±1°.

Phase Control Range - 360° Continuous rotation.

Burst Jitter - < 0.5°.

Display Differential Phase and Gain -
±1° and ±1%.

Center Dot Clamp Stability - < 0.4 mm spot movement.

Synchronization

Internal - Composite video with sync ±6 dB of nominal.

External Reference - Composite video or CW subcarrier.

X Y Mode

Input - Differential, DC coupled.

Input Amplitude - 2 to 9 V p-p, adjustable full scale deflection 0 dBm to +12 dBm for 600 Ohm system, factory set to 0 dBm.

Maximum Input - ±15 V peak signal + DC.

Frequency Response - DC to 500 kHz (DC to 100 kHz high-gain mode).

X and Y Phase Match - Less than a trace width separation at 20 kHz.

SCH Mode (1720 SCH and 1721 SCH Only)

Accuracy -
Absolute: ±5° phase at 25°C.
Relative: ±2°.

Acquisition Time - Less than 1 second.

1720 and 1730 Series Common Characteristics

CRT Viewing Area - 80 x 100 mm.

Trace Rotation - 8° range, typical.

Graticule - Internal scale with variable illumination.

Power Source

Mains Voltage Ranges - 115 V, 90-132 V, 230 V, 200-250 V.

Mains Frequency Range - 48 Hz to 66 Hz.

Power Consumption - 25 watts (85 BTU/HR) maximum.

Environmental

Temperature -
Nonoperating: -55°C to +75°C.
Operating: 0°C to +50°C.

Altitude -
Nonoperating: To 18,000 M (50,000 ft.).
Operating: To 5,500 M (15,000 ft.).

Shock -
Nonoperating: 30 g's, 1/2 sine, 11 ms duration, 3 shocks per surface (18 total).
Transportation - Qualified under NSTA Test Procedure 1A, Category II (30-inch drop).

Humidity - Meets Tektronix Standard 062-2847-00.

Certifications

EMC - Certified to the EMC Directive 89/336/EEC.

Safety -
Approved to: UL1244, CSA231.
Complies with: EN61010-1, IEC61010-1.

Physical Characteristics