WAAS GUS – Type 1 Signal Generator

NovAtel’s WAAS GUS-Type 1 Signal Generator is a high performance L1 and L5 signal generator designed for use in the ground uplink system of Satellite-Based Augmentation Systems.

Product sheet
Siggen Development Kit

Independent signal generators

The GUS Signal Generator is built with two independent L1 and L5 signal generators that precisely control the frequency and phase of L1 and L5 code and carrier. The signal generator provides two BPSK (Binary-Phase Shift Keying) modulated 70MHz intermediate frequency (IF) signals. In addition, it generates upconverted replicas of the L1 and L5 signals, which can be used for signal quality monitoring. The GUS Signal Generator also features a factory configurable bandwidth on the L1 IF signal.

Easy installation

Requiring minimal integration effort, the GUS Signal Generator is available in a 19 inch 3U rack-mount enclosure. Standard connectors also ensure quick and secure installation. Modulation of the output carrier signals is easily disabled with switches on the back panel. Designed to operate with NovAtel’s WAAS GUS-Type 1 Receiver, the GUS Signal Generator includes 1PPS and external frequency reference inputs. The front panel includes LEDs to provide the status of the external references, the signal output, and the results of the automatic self-testing.

Quick configuration and operation

Once connected to a data source, control computer, and 1PPS reference, the signal generator is ready to operate. The RS-232 serial ports provide a command and status interface. Configuration is completed using simple fixed-length message packets. Combined with two RS-485 ports for SBAS data symbol input, the GUS signal generator allows for independent control of the L1 and L5 data streams.