Figure 2-22: Connecting The Vits 201 And The Asg100/Asg140 For Vertical Interval - Tektronix VM700T User Manual

Option 41 and Option 42
2–38
NOTE. The output signal is HIGH during this function.
4. Close switch 10.
5. Connect a special cable between the VITS 201 remote connector and the
ASG100 remote connector as shown in Figure 2–22.
VITS201
Pin 5
Pin 14
Pin 8
Figure 2–22: Connecting the VITS 201 and the ASG100/ASG140 for Vertical Interval
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 line
10. This delay time is subtracted out of the VM700T A/V Timing measurement.
Placing the Signal Text in the Active Video. This procedure is used to place the
signal text in the active video.
1. Connect a PAL video source so that the VITS 201 is genlocked.
2. Ensure that J39 on the VITS 201 is set to 2-3.
3. Open S11 switch 4 and switch 10.
4. Press the Function button until a C appears. Enter some text such as "AV
TIME." Only one character is needed.
NOTE. The output signal is HIGH during this function.
5. Open S11-2. Press the Function button until an F appears. Set the Standby
INTERNAL test signal, as described inside the front cover of the VITS 201,
to 0% Black.
VM700T Option 40/41/42 Audio Measurements User Manual
ASG100/ ASG140
Pin 1
Pin 5