Specifications
1660 Barcode Scanner
User Guide 
1.4.2 Good Read Beep ..............................................................................................................
33 
1.4.3 Low Battery Alarm (1660) ...............................................................................................34 
1.4.4 Low Battery Alarm (1661) ...............................................................................................34 
1.5 Send “NR” to Host ....................................................................................................................35 
1.6 Scan Modes ..............................................................................................................................36 
1.6.1 Continuous Mode.............................................................................................................37 
1.6.2 Test Mode.........................................................................................................................37 
1.6.3 Laser Mode.......................................................................................................................38 
1.6.4 Auto Off Mode...................................................................................................................38 
1.6.5 Auto Power Off Mode .......................................................................................................38 
1.6.6 Alternate Mode.................................................................................................................39 
1.6.7 Aiming Mode..................................................................................................................... 39 
1.6.8 Multi-Barcode Mode.........................................................................................................40 
1.7 Scanning Timeout.....................................................................................................................41 
1.8 Delay between Re-read ............................................................................................................42 
1.9 Read Redundancy for All Symblogies......................................................................................43 
1.10 Addon Security for UPC/EAN Barcodes ................................................................................44 
1.11 Negative Barcodes .................................................................................................................45 
1.12 Effective Decoding Area.........................................................................................................46 
1.12.1 Positioning Window........................................................................................................46 
1.12.2 Adjusting Window...........................................................................................................47 
1.13 1661 Using Direct USB Cable ...............................................................................................48 
1.13.1 Direct USB Interface ......................................................................................................48 
1.13.2 Disable Direct USB Interface.........................................................................................48 
1.14 Hardware Reset......................................................................................................................49 
1.14.1 Restore System Defaults...............................................................................................49 
1.14.2 Reset Connection...........................................................................................................49 
SELECTING OUTPUT INTERFACE .......................................................................................................51 
2.1 BT HID........................................................................................................................................52 
2.1.1 Activate BT HID & Select Keyboard Type........................................................................52 
2.1.2 Reset Connection.............................................................................................................53 
2.1.3 Keyboard Settings............................................................................................................54 
2.1.4 Inter-Function Delay.........................................................................................................61 
2.1.5 HID Character Transmit Mode.........................................................................................61 
2.1.6 Keypad Support for iPhone/iPad ....................................................................................62 
2.2 BT SPP Slave.............................................................................................................................63 
2.2.1 Activate BT SPP Slave Mode ...........................................................................................63 
2.2.2 Inter-Function Delay.........................................................................................................63 
2.2.3 ACK/NAK Timeout............................................................................................................64 
2.3 BT SPP Master ..........................................................................................................................65 
2.3.1 Activate BT SPP Master Mode.........................................................................................65 
2.3.2 Inter-Function Delay.........................................................................................................67 
2.3.3 ACK/NAK Timeout............................................................................................................68 
2.3.4 Switch between Master/Slave Mode..............................................................................68 
2.4 USB HID via 3610.....................................................................................................................69 
2.4.1 Activate USB HID & Select Keyboard Type .....................................................................69 
2.4.2 Keyboard Settings............................................................................................................70 
2.4.3 Inter-Function Delay.........................................................................................................77 










