Frequency reference: 5032 package 13.000 MHz Warming voltage controlled crystal oscillator ( - TCXO) , frequency stability is +/- 2.5 ppm IF settings: The minimum frequency is adjustable in steps of 100 Hz, frequency range 0 - 999.9999 MHz, can be set to plus or minus IF mode working voltage: DC input: DC 9V - 12V working current: The backlight is enabled: less than equal 75 mA, backlight disabling: less than equal 55 mA Display: maximum of 9 digit display; physical dimensions: Length x width x height: 92mm x 37mm x 27mm Gate time: 0.01 seconds, 0.1 seconds, 1.0 seconds Measuring channels (high and low channels are high impedance) 1)Low channel Measuring range : 0.1MHz - 70MHz Measurement accuracy: +/- 100Hz (0.01 seconds gate) +/- 10Hz (0.1 seconds gate) +/- 1Hz (1.0 seconds gate) Sensitivity: 0.1MHz - 10MHz: 50mVPP 10MHz - 60MHz: superior to 50mVPP 60MHz - 75MHz: not tested 2)High channel frequency (64 points) Measuring range : 10MHz - 1.1GHz Measurement Accuracy : +/- 6400Hz (0.01 seconds gate) +/- 640Hz (0.1 seconds gate) +/- 64Hz (1.0 seconds gate) High channel sensitivity : 10MHz - 30MHz: 100mVPP 30MHz - 60MHz: superior to 50mVPP 60MHz - 1.1GHz: not tested Automatic channel is automatically based on the frequency of the input signal level of channel Crystal measuring channel: Measuring range : 1 MHz - 50 MHz (the most low-end and highest end untested) Board interface: RF INPUT (measuring signal input): XH2.54-2P square socket ICSP INPUT (MCU interface): XH2.54-6P square socket ECL INPUT (external clock input): XH2.54-2P square socket POWER INPUT (Power Interface): with 3.5mm socket (DC is negative) The XH2.54-2P square socket colour:Green Material:plastic Package Contents: 1 x PLJ-1601-C frequency meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.