Figure 2-23: Cabling Between The Vits 201 And The Asg100/Asg140 For Active Video - Tektronix VM700T User Manual

VM700T Option 40/41/42 Audio Measurements User Manual
6. Open S11 switch 3 and closed S11 switch 10.
7. Connect a special cable between the VITS 201 remote connector and the
ASG100/ASG140 remote connector as shown in Figure 2–23. A switch
should be used in line with pin 13 to use as an ENABLE. Connect the
switch, as shown, between pin 13 and pin 8. Other standby pages of standby
text can be used by grounding pins 4 and 11. See the VITS 201 PAL Insertion
Generator User Manual for more details.
VITS201
Force Standby Pin 13
Standby Message
Enable Pin 12
Timer Pin 14
Ground
Figure 2–23: Cabling between the VITS 201 and the ASG100/ASG140 for Active
Video
Checkout. When the VITS 201 is in the power-up Line Selection mode and is
genlocked, the signal at pin 14 of the remote connector will be a TTL low
voltage for 4.5 seconds, and then high for 0.5 seconds. The signal transitions
from low to high at line 1 field 1. When the TTL signal is high, the audio output
is ON, but the text inserted by the VITS 201 does not become visible until active
video. This delay time is subtracted out of the VM700T A/V Timing measure-
ment.
NOTE. This checkout forces the VITS 201 into Standby Mode. It can be used only
when the VITS 201 is out of service.
Enable
Pin 8
Option 41 and Option 42
ASG100/ ASG140
Pin 1
Pin 5
2–39