Probe Adapter 1
PROBE ADAPTER
(067–1429–00 to 067–1429–05)
PURPOSE
The Tektronix Probe Adapter accessory is designed to interface a Tektronix P6109 10X probe to the
VM700A Video Measurement Set. This accessory is intended for use in manufacturing and repair
applications when internal signals of an device under test are accessible only using a high-impedance
probe. The Probe Adapter provides the impedance matching and signal gain needed to drive the 75Ω
inputs of the VM700A.
Front Panel
Rear Panel
067-1429-00
PROBE ADAPTER
INPUT
(10K PROBE)
1MW , 20 pF
42 V PEAK MAX
LINE VOLTAGE
SET FOR 90–132V
OUTPUT
(75 OHM)
10 VA MAX
49–66 Hz
Figure 1. The VM700A Probe Adapter.
APPLICATION
When the Probe Adapter accessory is used, accurate measurement results are obtained by using the
relative-to-reference feature of the VM700A’s Measure Mode. The relative-to-reference feature
subtracts out distortions introduced by the Probe Adapter, thereby providing measurement results
that represent distortions introduced by the device under test. This feature removes the effects of the
0.3 degree differential phase and 0.3% differential gain that are inherent in the Probe Adapter, as well
as any frequency response flatness errors.
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