User's Manual

Because of the pass band characteristics of the receiver's ultra-stable IF filters there may be more

than one local maximum for a given signal, and if the signal is subject to dynamic fading (due to

relative motion of transmitter, receiver or interfering objects) the maximum signal point(s) may

move slightly or change in relative intensity. The search algorithm is designed to discriminate

multiple peaks of equal or increasing magnitude, and locks on to each one individually until you

press SHIFT. The search over the specified range repeats continuously until terminated by ESC.

Neighbourhood

This option initiates a search over a range of frequencies from 8KHz below to 8KHz above the

current manual tuner frequency.

Cont

The continue option simply continues a search which has been stopped by ESC from the same

point it left off.

EXIT

The option returns you to the power-on default display or manual mode. ESC accomplishes the

same.

SET F

The SET F key permits manual tuning of the receiver operating frequency. SET F first issues a

prompt:

Enter frequency

and then waits until it receives input from the keypad in the form of a 6-digit decimal number

representing the receive frequency in MHz. If the requested frequency is out of range of the

hardware, a "Value out of range!" message will be displayed and the receiver will wait for

another input. Pressing the ESC key causes the function to abort without updating. On exit, the

power-on default display is restored with the current frequency displayed.

SET G

The SET G key allows the user to directly enter a gain setting. It issues the prompt:

Enter gain (00-99)

(50)>

The range of acceptable values is shown in on the top line and the current default value is shown

on the bottom line. The receiver waits until it receives two numeric inputs from the keypad.

Shifted or non-numeric keys (except ESC) are ignored. The system gain is then set according to

the received two-digit value. Pressing the ESC key causes the function to abort without

updating. On exit, the power-on default display (frequency and gain) is restored.