FLEX

FLEX

Frequencies	152.6 MHz,931.938 MHz
Frequency Range	152.6 MHz - 931.938 MHz
Mode	NFM
Modulation	FSK,4FSK
ACF	—
Emission Designator	—
Bandwidth	5 kHz
Location	Worldwide
Short Description	FLEX (Flexible Wide Area Paging Protocol) is Motorola's high speed one-way paging protocol that supports 1600, 3200, and 6400 bps. FLEX can transmit tone, numeric, alphanumeric, and binary data.
I/Q Raw Recording	Download file
Audio Sample

FLEX (Flexible Wide Area Paging Protocol) is Motorola's high speed one-way paging protocol that supports 1600, 3200, and 6400 bpsBits per second (bps). FLEX can transmit numeric, alphanumeric, and binary data.

FLEX uses either 2FSK or 4FSK4-Level Frequency Shift Keying. 2FSK speeds are 1600 bpsBits per second (bps) and 3200 bpsBits per second (bps). 4FSK4-Level Frequency Shift Keying speeds are 3200 bpsBits per second (bps) and 6400 bpsBits per second (bps).

ReFLEX is the two-way variant of the FLEX protocol.

Mode Samples

1600 bpsBits per second (bps)

3200 bpsBits per second (bps)

6400 bpsBits per second (bps)

Frequencies

• 148.8125 MHzMegaHertz (MHz) 10^6 Hz (South Australian Government Radio Network)
• 152.6 MHzMegaHertz (MHz) 10^6 Hz
• 153.025 MHzMegaHertz (MHz) 10^6 Hz (Seen in UK, Mostly Medical)
• 157.950 MHzMegaHertz (MHz) 10^6 Hz (FENZ)
• 169 MHzMegaHertz (MHz) 10^6 Hz
• 309.505 MHzMegaHertz (MHz) 10^6 Hz
• 310.905 MHzMegaHertz (MHz) 10^6 Hz
• 829.612 MHzMegaHertz (MHz) 10^6 Hz
• 929.362 MHzMegaHertz (MHz) 10^6 Hz
• 929.387 MHzMegaHertz (MHz) 10^6 Hz
• 929.538 MHzMegaHertz (MHz) 10^6 Hz
• 929.612 MHzMegaHertz (MHz) 10^6 Hz
• 929.662 MHzMegaHertz (MHz) 10^6 Hz
• 929.937 MHzMegaHertz (MHz) 10^6 Hz
• 931.063 MHzMegaHertz (MHz) 10^6 Hz
• 931.863 MHzMegaHertz (MHz) 10^6 Hz
• 931.938 MHzMegaHertz (MHz) 10^6 Hz

Decoding Software

Hobby Level Software

• PDW
• multimon-ng

Professional Equipment/Software

• go2DECODE
• go2MONITOR
• CODE300-32
• Rohde&Schwarz CA100

Video Examples

• Decoding FLEX pager
• HDSDR + EzTV666 RTL2832U, Decoding pager data with PDW

Additional Links

• FLEX vs POCSAG
• Design and Implementation of a Practical FLEX Paging Decoder, Masters Thesis, Virginia Polytechnic Institute
• shoc Database: FLEX
• WAVECOM Database: FLEX
• RadioScanner.RU FLEX

Additional Images

FLEX Pager signal 4FSK4-Level Frequency Shift Keying FLEX, 6400 bpsBits per second (bps) 2FSK FLEX, 1600 bpsBits per second (bps) FLEX heard in Connecticut, USA at 151.592MHz FLEX heard in Connecticut, USA at 929.941Mhz Flex heard in Cambridge, Massachusetts, USA, at 152.6MHz