Vaisala RVP900

Appendix C _____________________________________________ Installation and Test Procedures
VAISALA______________________________________________________________________ 371
C.9 Setup "Mt" Command (General Trigger
Setup)
Test Goal
Verify that the TTY setups for the General Trigger Setup section are
properly configured for the customer application.
Background
The RVP900 can output up to 10 different triggers. These can be delayed
by different amounts, and have different pulse widths. For example, trigger
0 may go to fire the transmitter, while a slightly delayed trigger 1 may be
used for triggering an oscilloscope. The timing can be different for each
transmitter pulse width. The final timing adjustments are configured in
Section C.15 Burst Pulse Alignment on page 374.
In the chart below, enter the purpose of each trigger, the nominal start time,
and pulse width. Start times are relative to range zero (middle of the burst
pulse). We recommend a nominal pulse width of 3 microseconds. This
chart is used in Section C.10 Initial Setup of Information for Each Pulse
Width on page 367.
Magnetron radars using an analog COHO system often have a trigger
generator circuit, which produces a trigger for the COHO latching, and
also for the transmitter pulse. This circuit should be bypassed in an
upgrade.
Reference
-See Section 4.2.4 Mt — General Trigger Setups on page 114
# Purpose Start Time Pulse Width
0 _____________________________ ________usec ________usec
1 _____________________________ ________usec ________usec
2 _____________________________ ________usec ________usec
3 _____________________________ ________usec ________usec
4 _____________________________ ________usec ________usec
5 _____________________________ ________usec ________usec
6 _____________________________ ________usec ________usec
7 _____________________________ ________usec ________usec
8 _____________________________ ________usec ________usec
9 _____________________________ ________usec ________usec