The SigGen SX1509 test program can be used when you want to test if you have connected the keypad, rotary encoders and push buttons in the right way, e.g. when you turn the rotary encoder you intend to use for the frequency then the test program will not only tell you that you are turning the right rotary encoder but also in the right direction etc.

You may connect a couple of wires between each test, so you don’t have to troubleshoot 20 wires all at ones. But don’t solder or connect wires, if you have power applied. Always switch off the electronics first.

Example of output when pressing keys on the keypad, push buttons and rotary encoders.

Connection overview.

Entity	Pin	Connected to entity	Connected to pin
SX1509	GND	RFzero	GND
	3V3	RFzero	3V3
	SDA	RFzero	D8 (SDA)
	SCL	RFzero	D9 (SCL)
	INT	RFzero	D17
	IO0	Keypad Amplitude rotary encoder	5 Push button Y
	IO1	Keypad Frequency rotary encoder	6 Push button Y
	IO2	Keypad RF on/off	7 Push button Y
	IO3	Keypad Menu on/off	8 Push button Y
	IO4	Attenuator	Bit 0, LSB
	IO5	Attenuator	Bit 1
	IO6	Attenuator	Bit 2
	IO7	Attenuator	Bit 3
	IO8	Keypad	1
	IO9	Keypad	2
	IO10	Keypad	3
	IO11	Keypad	4
	IO12	Amplitude rotary encoder Frequency rotary encoder RF on/off Menu on/off	Push button X Push button X Push button X Push button X
	IO13	Attenuator	Bit 4
	IO14	Attenuator	Bit 5
	IO15	Attenuator	Bit 6, MSB
Keypad (see also note below)	1	SX1509	IO8
	2	SX1509	IO9
	3	SX1509	IO10
	4	SX1509	IO11
	5	SX1509	IO0
	6	SX1509	IO1
	7	SX1509	IO2
	8	SX1509	IO3
Amplitude rotary encoder	GND	RFzero	GND
	A	RFzero	A5
	B	RFzero	A4
	Push button X	SX1509	IO12
	Push button Y	SX1509	IO0
Frequency rotary encoder	GND	RFzero	GND
	A	RFzero	A2
	B	RFzero	A3
	Push button X	SX1509	IO12
	Push button Y	SX1509	IO1
RF on/off	Push button X	SX1509	IO12
	Push button Y	SX1509	IO2
Menu on/off	Push button X	SX1509	IO12
	Push button Y	SX1509	IO3
MCP23017	GND	RFzero	GND
	3V3	RFzero	3V3
	SDA	RFzero	D8 (SDA)
	SCL	RFzero	D9 (SCL)
	GPA-GPB	Attenuator	Depends on att.