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Table 13-19
Low noise, High Spur Frequency Algorithm
Input Freq. (MHz)
480 to 720
120 to 700
YIG-Tuned-Filter (YTF)
The YTF is a three resonator filter tunable from 2.4 to 26.5 GHz. The filter is
used to select the desired comb frequency, and reject the undesired signals. It
is identical to the YTF used in the step reference. See HP 70428A
YIG-Tuned-Filter (YTF).
GaAs Amplifier Preamp & Power Amp
The YTF output is amplified by the output GaAs amplifiers. The amplifier
input range is 2.4 to 26.5 GHz, with a input level of –27 dBm to –23 dBm.
The output amplifier microcircuits are identical to the step reference output
microcircuits. See HP 70428A GaAs Amplifier Preamp & Power Amp.
HP 70428A opt 002 Microwave Deck Assembly
LO Freq. (GHz)
Mixer SB
25.2
upper
25.8
upper
HP 70427A/HP 70428A User's Guide 13-49
Block Diagram
Output Freq. (GHz)
25.68 to 25.92
25.92 to 26.50
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