Evaluation Kit Configuration
The PE3342 Evaluation Board is configured with an on-board VCO, TCXO reference and
a second order active loop filter. T he VCO tuning range is approximately 190 MHz with
middle frequency at 2610+/- 25 for a tuning voltage 0.5 to 4.5 volts. The reference
oscillator is 20 MHz. The loop filter is designed for a 1 MHz comparison frequency and a
2600 MHz output frequency with unity gain crossover at 66 kHz, phase margin of 65
degrees and 1.2 dB of peaking. Unless noted, the data provided was measured in this
configuration with the default jumper settings shown in Figure 1.
Two jumpers (J5 & J6) configure the Evaluation Board to operate with either the on-
board reference oscillator (TCXO) or an external reference applied to J7. Figure 1
shows the proper configuration for utilizing the on-board TCXO reference. J6 in the
middle-to-right connection as shown connects the output of the TCXO to the PLL f r input,
while J5 installed provides power to the TCXO. Do not connect any external reference to
J7 if the on-board reference is selected. To use an external reference, place J6 in the
middle-to-left connection which connects the PLL f r input to the J7 SMA connector and
remove the jumper on J5 to power-down the TCXO. Figure 2 shows the configuration of
using an external reference.
The default jumper and switch settings are shown in Figure 1, which place the part into
EEPROM mode utilizing the on-board reference. Peregrine Semiconductor recommends
that the default settings be used initially to bring up the evaluation board and duplicate
the enclosed measured data.
Peregrine Semiconductor Corportation ?
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