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FLEX-6000 Signature Series – Maestro User Guide

1. Select a signal of known frequency, with strength greater than S6. In the US, WWV is a

good choice.

2. Enter the known frequency in the Calibration Frequency field

3. Click Start

The radio will tune to the signal and compare its tuned frequency to the declared frequency. The

difference will appear in the Offset field. You can also enter a value directly into the Offset field.

NOTE: When running the frequency calibration, the radio uses Slice A and ANT-1 regardless of

the radio’s slice/antenna configuration.

NOTE: When running the frequency calibration, the radio uses Slice A and ANT-1 regardless of

the radio’s slice/antenna configuration. The frequency calibration should be run in a single

Station configuration (as opposed to multiple connected Stations via multiFLEX) for best

results.

The 10 MHz Reference section offers a selection of 10 MHz signal sources that synchronize the

local 10 MHz master oscillator. This feature is not available in the FLEX-6300, FLEX-6500, or FLEX-

6700.

The radio monitors each of the inputs and indicates which has a signal present with the blue

marker. The Temperature Compensated Crystal Oscillator (TCXO) is part of the radio hardware and

is always available. When one of the three inputs is selected, using the menu shown above, the

radio will use that input regardless of the presence of a signal. The master oscillator status is

shown to the right of the selection list. When the master oscillator is trying to lock to the selected

input, the status message will say “searching”. When it is locked, it will say “Locked”.

In Auto mode, the radio monitors each of the inputs and selects an input that offers a signal in

priority order. The highest priority signal is the External 10 MHz signal (optional), followed by the

GPSDO signal (optional), followed by the TCXO signal (always provided). The radio will track

changes in the availability of the signals. For instance, if the External 10 MHz signal appears, the

radio will switch to it from the GPSDO or TCXO signal.

FlexRadio Signature FLEX-6000 Series User Manual

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