Si4731-DEMO

8

Rev. 0.1

The FM and AM radio parameters which can be configured from setup menu are listed below in Table 2.

M+/ M–

In setup menu, select

next calendar item.

In setup menu, select next adjustable item.

In radio mode, tune to the next preset station.

Vol+ /

Vol–

< 3 s

None

Increase or decrease volume 1 step.

> 3 s

Quickly increase or decrease volume.

FUNC/DIGIT

None

Shift the keyboard between normal function and digital input mode.

Combination

keying

None

A: Radio IC version

B: Firmware version

C: Varactor reading

D: AGC status

Table 2. Radio Configuration Parameters

FM Parameter

AM Parameter

Spacing: 50/100/200 kHz

Default: 100 kHz

Spacing: 1/9/10 kHz

Default: 9 kHz

RSSI Seek: 0–127 dBµV

Default: 20 dBµV

RSSI Seek: (0–63 dBµV

Default: 25 dBµV

SNR Seek: 0–127 dB

Default: 03 dB

SNR Seek: 0–63 dB

Default: 05 dB

Pre-emphasis: 50 or 75 µs

Default: 75 µs

Pre-emphasis: 00 disable, 50 µs

Default: 00

Band High Threshold: Max 108 MHz

Default:107.90 MHz

Band High Threshold: Max 1710 kHz

Default:1710 kHz

Band Low Threshold: min 76 MHz

Default: 87.50 MHz

Band Low Threshold: min 520 kHz

Default: 522 kHz

Channel Filter: 00/40/60/80/100 kHz

Default: 00 (Auto)

Channel Filter: 1/2/3/4/6 kHz

Default: 2 kHz

RClock: 0: AFC disable

32763~32773

Default: 32768

RClock: 0 AFC disable

32763~32773

Default: 32768

Smute Rate: 0–255

Default: 64

Smute Rate: 0–255

Default: 64

Smute SNR: 0–15 dB

Default: 4 dB

Smute SNR: 0–63 dB

Default: 10 dB

Smute Attenuation: (0–31 dB)

Default: 16 dB

Smute Attenuation: 0–63 dB

Default: 16 dB

Table 1. Key Function Description (Continued)

Button/Mode

Calendar Mode

Tuner Off

Radio AM/FM Mode

Tuner On

Note: Combination keying is entered and exited from Radio Mode by pressing and holding the SET key then pressing the

BANDS key. A combination of the SET and the MSCAN keys will cycle through the available display items.