Linear Phase Modulator - PMM005 - GDP Space Systems - Telemetry Systems, Synchronizers, BERTS, Demodulaters, Modulators, Receivers, Frame Synchronizers, decommutator, Simulators

The PMM005 is a multi-function module comprising a set of four clock & data digital interfaces, a four-input signal summer, a linear phase modulator, and an upconverter.
Four level-converters are provided for input clock & data signals that convert RS422 to TTL levels. Typically, these are used to drive BPSK modulators. In addition, any departure in the input clock waveform, from the ideal 50% duty cycle, is corrected.

Features

70 MHz IF Output
Four input Signal Summer
(4) RS422 Data and Clock level conversion to TTL
Modulation Signal and Output Monitor
Sum Out (PM Modulator Input) Signal Monitor
PM Modulator Output Signal Monitor
70 MHz IF Test Output
Automatic Output Termination

Four (4) subcarrier modulator outputs are applied to a linear signal Summer contained on the PMM005 module. The individual signal amplitudes are controlled on the modulators to create a composite signal with appropriate component power levels. On the PMM005, the composite signal level is adjusted prior to its application to a Phase Modulator.
The composite signal output from the Summer is used to phase modulate a 12 MHz subcarrier. This phase modulated 12 MHz subcarrier is upconverted to 70 MHz by heterodyning with a 58 MHz local oscillator. The output level of the 70 MHz IF PM carrier is programmable over a 20 dB range. A sample of the 70 MHz output is provided as a monitor output for connection to a test point. The output of the Summer and the 12 MHz subcarrier output of the Phase Modulator are also connected to monitor connectors.


			[ Home \| Products \| Support \| Events \| Contact us ] © 2004 GDP Space Systems - a division of Delta Information Systems, Inc.

The PMM005 is a multi-function module comprising a set of four clock & data digital interfaces, a four-input signal summer, a linear phase modulator, and an upconverter. Four level-converters are provided for input clock & data signals that convert RS422 to TTL levels. Typically, these are used to drive BPSK modulators. In addition, any departure in the input clock waveform, from the ideal 50% duty cycle, is corrected.
Features
70 MHz IF Output Four input Signal Summer (4) RS422 Data and Clock level conversion to TTL Modulation Signal and Output Monitor Sum Out (PM Modulator Input) Signal Monitor PM Modulator Output Signal Monitor 70 MHz IF Test Output Automatic Output Termination
Four (4) subcarrier modulator outputs are applied to a linear signal Summer contained on the PMM005 module. The individual signal amplitudes are controlled on the modulators to create a composite signal with appropriate component power levels. On the PMM005, the composite signal level is adjusted prior to its application to a Phase Modulator. The composite signal output from the Summer is used to phase modulate a 12 MHz subcarrier. This phase modulated 12 MHz subcarrier is upconverted to 70 MHz by heterodyning with a 58 MHz local oscillator. The output level of the 70 MHz IF PM carrier is programmable over a 20 dB range. A sample of the 70 MHz output is provided as a monitor output for connection to a test point. The output of the Summer and the 12 MHz subcarrier output of the Phase Modulator are also connected to monitor connectors.