Vaisala RVP900 User Manual

Appendix C _____________________________________________ Installation and Test Procedures
VAISALA______________________________________________________________________ 373
C.10 Initial Setup of Information for Each Pulse
Width
Test Goal
Enter the initial values for the TTY Setups for each of the pulse widths.
Background
The duty cycle of the transmitter is the product of the PRF and the pulse
width in seconds. For example, a PRF of 1000 Hz and 1 microsecond pulse
width is a duty cycle of 0.001. Thus a transmitter with a 0.001 duty cycle
limit could function at 1000 Hz and 1 microsecond pulse width, or 500 Hz
and 2 microsecond pulse widths.
The duty cycle limits of your radar should be obtained from your system
documentation or radar manufacturer. The RVP900 supports up to four
pulse widths (coded 0 to 3), although most transmitters typically support
only two pulse widths. Record, in the chart below, the pulse width in
microseconds and the maximum PRF that is allowed for each pulse width.
Special Test Equipment
- KVM connected
Reference
- See Section 4.2.5 Mt<n>— Triggers for Pulsewidth #n on page 117.
Test Procedure
1. Enter the TTY setups and type the "Mt #" command, once for each
pulse width.
2. Enter the start time and widths for each trigger as documented in the
chart in Section C.9 Setup "Mt" Command (General Trigger Setup) on
page 365.
NOTE
The final values of trigger timing, FIR filter impulse response length, and
bandwidth are adjusted later.
# Pulse Width Max PRF
0 __________ microseconds ________ Hz
1 __________ microseconds ________ Hz
2 __________ microseconds ________ Hz
3 __________ microseconds ________ Hz

Vaisala RVP900 Specifications

General

Brand	Vaisala
Model	RVP900
Category	Receiver
Language	English