IM-2410 Frequency Counter

The Heathkit IM-2410 Digital Frequency Counter is a frequency counter
that can accurately measure frequencies from 10 Hz to 225 MHz. The
2-position Frequency Range switch and the dual time Gate switch make
this counter extremely versatile. The 8-digit display always reads out
directly in MHz to provide high resolution (10 Hz resolution at 225 MHz).

SPECIFICATIONS

Display . . . . . . . . . . . . .  8-digit LED display

Frequency Ranges  . . . . . . . .  10 Hz to 50 MHZ
                                   20 MHZ to 225 MHz

Sensitivity . . . . . . . . . . .  10 Hz to 50 MHz range: 25 mVrms maximum
                                   10 mV typical from 10 Hz to 30 MHz
                                   50 mVrms maximum from 30 MHz to 50 MHz

Input Impedance . . . . . . . . .  1 Mohms shunted by less than 24 pF

Input Protection  . . . . . . . .  150 VAC up to 100 kHz de-rating to 5 VAC from 160 MHz to 225 MHz

Internal Time Base Frequency  . .  3.58 MHz

Setability  . . . . . . . . . . .  +/- 1 PPM

Temperature Stability . . . . . .  +/- 10 PPM from 0o to 40o C

Gate Time . . . . . . . . . . . .  1 second or .1 second (switch selectable)

Power Requirements  . . . . . . .  105 – 130 or 210 – 260 VAC, 50 – 60 Hz, 25 watts maximum

Dimensions  . . . . . . . . . . .  7-1/4” wide, 3-3/8” high, 9-1/2” deep

Net Weight  . . . . . . . . . . .  5 lbs