Video Measurement Set With Audio Measurements Capability

VM 700A Option 40/41

This product is no longer carried in our catalog.

Features

• Automatic measurement of Short Duration Audio Test Sequence
• Combined video and audio performance reports
• Real-time spectral display
• Real-time multitone analyzer
• Single stereo audio input on Option 40
• Three stereo audio inputs on Option 41
• Measure frequency response, distortion, phase, crosstalk, and other important audio parameters

Characteristics

Amplitude Measurements

Range (for specified accuracy): -69 dBu to +26.5 dBu (275 microvolts to 16.4 V RMS)

Resolution: +/- 0.1 dB

Accuracy: 20 Hz to 20 kHz

Including flatness: +/- 0.2 dB (input >/= -20 dBu)
+/- 0.3 dB (-50 dBu to -20 dBu)
+/- 0.5 dB (-60 dBu to -50 dBu)
+/- 1.0 dB (-70 dBu to -60 dBu)

Flatness: +/- 0.1 dB from 20 Hz to 20 kHz.

Frequency Measurements

Range: 10 Hz to 20 kHz

Resolution: 1 Hz. Accuracy: 1 Hz

Distortion Measurements

Range: </= 0.01% to 33%

Residual THD+N: </= 0.01% (</= -80 dB) measured over a 20 kHz bandwidth, for inputs from 10 Hz to 10 kHz above -13.5 dBu.

Multitone Analyzer

Level of Multitone Relative to RMS level:
Multitone 1: -19.9 dB
Multitone 2: -18.9 dB
Multitone 3: -13.8 dB
Multitone 4: -15.9 dB

Reference Frequency for Multitone Recognition:
Multitone 1: 422 Hz
Multitone 2: 562 Hz
Multitone 3: 656 Hz
Multitone 4: 750 Hz

Minimum Multitone Recognition Time: 1 second

Measurement Update Rate: 5 reading per second

Maximum Frequency Error for Multitone Recognition: Within +/- 10% of reference frequency.

Level and Frequency Measurement Accuracy: Same as audio analyzer

Other

Input Connectors

Opt. 40: Two miniature XLR (Switchcraft TY3F)

Opt. 41: One male DB-37

Input Impedance: 50 ohm (differential)

Signal-to-Noise (in Auto Range):
For inputs >/= -18 dBu (100 mV) s/n >/= 82 dB
For inputs >/= 0 dBu (775 mV) s/n >/= 98 dB
For inputs >/= +8 dBu (2 V) s/n >/= 106 dB

"A" weighing improves s/n by approximately equal to 2.5 dB

Level Difference Between Channels: </= 0.5 dB

Phase Difference Between Channels: </= 2 degrees

Phase Measurement Error: </= 2 degrees

Channel Separation: > 70 dB to 60 Hz (due to DC offset effects) >/= 95 dB from 60 Hz to 20 kHz

Ordering Information

To order a VM700A with stereo audio input measurement capability, order VM700A Opt. 1 and/or Opt. 11 with Opt. 40.

If you own a VM700A and wish to add stereo audio input measurement capability, order VM7F02 Opt. 40.

To order a VM 700A with three stereo audio input measurement capability, order VM 700A Opt. 01 and/or Opt. 11 with Opt. 41.

If you own a VM 700A without an audio option and wish to add three stereo audio input measurement capability, order VM7F02 Opt. 41.

If you own a VM 700A with standard audio Opt. 40 and wish to upgrade to Opt. 41, contact your local Tektronix sales manager for upgrade information.

Tektronix Measurement products are manufactured in ISO registered facilities.

For additional information or to order, contact your local Tektronix representative.