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2-3 Frequency Synthesis
Functional Description
2-6
PN: 10370-10386 Rev. B
MG362x1A MM
Frequency Extension Module (FEM)
The B11 Frequency Extension Module is used on all MG362x1A models with RF output frequencies > 20 GHz.
Model MG36241A uses an FEM to double the fundamental frequencies of 10 to 20 GHz to produce RF output
frequencies of 20 to 40 GHz.
The RF signal from the switched filter assembly is input to the FEM. During CW or step frequency operations
in the 20 to 43.5 GHz frequency range, the 10 to 20 GHz RF signal input is routed by PIN switches to the
doubler/amplifiers. PIN switch drive current is provided by the B5 ALC PCB. The RF signal is amplified, then
doubled in frequency. From the doubler, the 20 to 43.5 GHz RF signal is routed by PIN switches to the
bandpass filters. The Frequency Extension Unit has three bandpass filter paths that provide good harmonic
performance. The filter frequency ranges are 20 to 25 GHz, 25 to 32 GHz, and 32 to 40 GHz, 40 to 43.5 GHz.
After routing through the appropriate bandpass filter, the 20 to 40 GHz RF signal is multiplexed by the PIN
switches to the FEM output at connector J2. RF signals input to the FEM of
20 GHz are multiplexed through
by the PIN switches of the FEM to the output connector J2. From J2, the RF signal goes to the directional
coupler. Option 15 adds an amplifier between the FEM J2 output and the directional coupler.
Frequency Switching Speed
The frequency switching speed is the elapsed time from the beginning of a frequency change to the point at
which frequency is settled to within 1 kHz of the destination frequency. There is a “Frequency Valid” logic
output to the rear panel. A high-to-low transition of this bit will indicate that RF frequency is about to change.
The bit will remain low until RF is settled at the new frequency. This bit will serve as the trigger for
frequency-related switching time measurements.
Step Sweep Mode
Step (digital) frequency sweeps of the YIG-tuned oscillator RF output consist of a series of discrete, synthesized
steps between a start and stop frequency. Each frequency step is generated by applying the tuning signal
(from the B6 module Module) to the YIG-tuned oscillator’s main tuning coil, then phase-locking the RF output.
Every frequency step in the sweep range is phase-locked.
Содержание Rubidium MG362 1A Series
Страница 12: ...Contents 10 PN 10370 10386 Rev B MG362x1A MM ...
Страница 16: ...1 9 ESD Requirements General Information 1 4 PN 10370 10386 Rev B MG362x1A MM ...
Страница 30: ...2 6 RF Deck Assemblies Functional Description 2 14 PN 10370 10386 Rev B MG362x1A MM ...
Страница 66: ...3 11 FM and Phase Modulation Calibration Calibration 3 36 PN 10370 10386 Rev B MG362x1A MM ...
Страница 164: ...4 26 Pulse Modulation Tests with the 86100C Oscilloscope Performance Verification 4 98 PN 10370 10386 Rev B MG362x1A MM ...
Страница 292: ...B 5 Self Test Messages Instrument Messages B 8 PN 10370 10386 Rev B MG362x1A MM ...
Страница 293: ......