The VSM-61 is designed for convenience and ease of operation in observing the
vector display of video signals. Market-proven traditional features are combined
with ergonomically designed controls. Proven, reliable circuit design permits
accurate measurement of differential gain and differential phase of color
television signals. Selection of inputs (A, B or subcarrier A) and references
(A, B or external subcarrier) are easily accomplished via tactile membrane
control switches. Rapid A/B comparisons may be made by directly switching
between the A and B inputs. Requiring only three rack units (5.25 inches) and
one half-rack width, the VSM-61 vectorscope may be mounted in the optional DRC-1
double rackmount case along with Videotek’s TSM-51 or TSM-61 waveform monitor
for complete signal monitoring.
特征：
Inputs：Selectable A to B loop through, subcarrier A,external subcarrier,
external PAL pulse (PAL only)
Phase reference：Selectable A or B and external subcarrier loop through
Test NTSC：Normal/Alternate Line/Test Circle selectable
Test Pal/PAL-M：Normal/NTSC Display/Test Circle selectable
Graticule：Internally etched to eliminate parallax errors
High brightness CRT：With nonglare contrast filter for enhanced
visibility
Standards available：NTSC, PAL, PAL-M
性能參數(shù)：
Input Return Loss：40 dB minimum, 46 dB typical, 50 Hz to 5 MHz
Input Isolation：60 dB minimum, 70 dB typical at subcarrier frequency
Input Level Range：AC：1.0V p-p ±6 dB DC： ±5V
Front Panel Gain Control Range：12 dB minimum, -6 dB to +6 dB
Gain Stability：Less than 3% change from 0°C to +50°C, mains varied ± 5%
from center of range
