Model LA-2132K (250 Mega) LA-2132M (500 Mega) LA-2132G (1Giga) Frequency 250 MHz 500 MHz 250 MHz 1 GHz 500 MHz 250 MHz Channel 32 Ch 16 Ch 32 Ch 8 Ch 16 Ch 32 Ch Memory 256K 1 Mega 512K 4 Mega 2 Mega 1 Mega Impedance 250KW < 2P 250KW < 2P 250KW < 2P Threshold Voltage 1 SETS -3.7 to 1.9V 1 SETS -3.7 to 1.9V 1 SETS -3.7 to 1.9V External Clock 1 Ch 0~125MHz 1 Ch 0~125MHz 1 Ch 0~125MHz Trigger 512 Levels 32 Ch Parallel, Serial, I2C... 512 Levels 32 Ch Parallel, Serial, I2C... 512 Levels 32 Ch Parallel, Serial, I2C... Max Input Voltage ±110V ±110V ±110V Max Input Bandwidth 125MHz 125MHz 125MHz PC Interface USB only (USB 1.1/ 2.0) USB only (USB 1.1/ 2.0) USB only (USB 1.1/ 2.0)