Tektronix Webcam 070-8030-01 User Manual
Specifications
1780R-Series Service Manual
1–15
Table 1–7: Vectorscope Vector Display (Cont.)
Characteristic
Performance
Check Step
Check Step
Supplemental Information
Performance Requirement
Variable GAIN Range
+14 dB to –6 dB of 75% color bar
preset gain.
preset gain.
Unterminated color bar signal can
be brought to appropriate targets.
Burst from a triple terminated
signal can be moved to the
compass rose.
be brought to appropriate targets.
Burst from a triple terminated
signal can be moved to the
compass rose.
52
Max Gain
>X5.
Variable GAIN Phase Shift
±
1
_ as gain is varied from +3 dB
to – 6 dB.
53
Table 1–8: Vectorscope X-Y Display
Characteristic
Performance Requirement
Supplemental Information
Performance
Check Step
Check Step
Input
DC coupled differential inputs
through rear-panel connector.
through rear-panel connector.
Input Amplitude
2 to 9 V peak-to-peak.
Adjustable full scale deflection
0 dBm to +12 dBm for 600
0 dBm to +12 dBm for 600
W
system. Factory set to 0 dBm.
Maximum Input Voltage
±
15 V combined peak signal and
DC.
Frequency Response
DC to >500 kHz.
3 dB point.
55
X and Y Input Phase Matching
< a trace width of separation at
20 kHz.
20 kHz.
Single-ended. Phase matching
above 20 kHz may be improved
by adjusting Vertical Deflection
Amplifier VHF Compensation.
above 20 kHz may be improved
by adjusting Vertical Deflection
Amplifier VHF Compensation.
54
Table 1–9: Vectorscope SCH Phase Display
Characteristic
Performance Requirement
Supplemental Information
Performance
Check Step
Check Step
Accuracy
Absolute
±
5
_ phase at 25_ C.
56
Relative
±
2
_.
Acquisition Time
≤
1 sec.
56
Display Phase Error caused by CRT
Geometry Variations
Geometry Variations
±
1.25
_ calibrated for zero display
phase error at zero SCH phase.