Zagg ZKSM ユーザーズマニュアル
3.13.
Pseudo N-Key Rollover Capability
‘N’ key roller is the numbers of keys that may be held depressed simultaneously and have the
keyboard generate the appropriate code for each pressed and released key without keyboard
interruption. The keyboard is capable of at least a pseudo 6-key rollover. All combinations of
Ctrl, Alt and Shift keys are not ghost keys.
keyboard generate the appropriate code for each pressed and released key without keyboard
interruption. The keyboard is capable of at least a pseudo 6-key rollover. All combinations of
Ctrl, Alt and Shift keys are not ghost keys.
3.14.
Free From Illegal Ghost key
Key matrix layout has been properly managed such that no ghost key occurs for any 3-key
combination. The ghost key is defined as 3-key combination where a valid third key falls in the
‘#’ pattern in the key matrix, formed by the proceeding valid 2-key combination. Normally in
this case, the third key will be masked without sending any code because the third key and
fourth key in this ‘#’ pattern are confusing the microprocessor of three keyboard.
combination. The ghost key is defined as 3-key combination where a valid third key falls in the
‘#’ pattern in the key matrix, formed by the proceeding valid 2-key combination. Normally in
this case, the third key will be masked without sending any code because the third key and
fourth key in this ‘#’ pattern are confusing the microprocessor of three keyboard.
3.15.
Compatibility
Operation System: Windows OS
Bluetooth 3.0 LE specification compliant.
Bluetooth HID profile V 1.1 compliant
VID/PID in firmware is 0a5c/8502 (Default Broadcom)
Bluetooth 3.0 LE specification compliant.
Bluetooth HID profile V 1.1 compliant
VID/PID in firmware is 0a5c/8502 (Default Broadcom)
3.16.
Charging Specification
Charging current: 180mA
3.17.
Keyboard Module
Key matrix traces with switch contact fingers are laid out and routed on a 3 layers membrane
sheet and scissor keycap as a key module. The contact resistance is less than 1000 ohm.
sheet and scissor keycap as a key module. The contact resistance is less than 1000 ohm.
3.18.
Key Functional Test
Refer to Key Layout and to use Bluetooth test program & fixture.
3.19.
Bluetooth RF Power & Frequency Test
RF Power Range: -35dBm ~ -5 dBm
Frequency tolerance: +/- 75 KHz
Low Frequency: 2402 MHz
Middle Frequency: 2441 MHz
High Frequency: 2448 MHz
Frequency tolerance: +/- 75 KHz
Low Frequency: 2402 MHz
Middle Frequency: 2441 MHz
High Frequency: 2448 MHz
3.20.
EMI Test
• European Standard EN 55022: 2006 Class B.
• FCC/CFR 47 : Part 15 Class B
• Frequency Range of Test: from 30MHz to 1000 MHz
• FCC/CFR 47 : Part 15 Class B
• Frequency Range of Test: from 30MHz to 1000 MHz