====== Digital Readout Model 244 ======
{{244.jpg?150|}}
===== Description =====
Plugs into the accessory socket of the Model [[540]].  Six digits show actual transmitted and received frequencies to hundreds of Hertz.  The VFO output frequency, which is 9 MHz away from the operating frequency, is counted and a 9 MHz preset is either added to or subtracted from the count by means of the front panel mode switch, thus eliminating all VFO crystal tolerance errors.  The 9 MHz oscillator tolerance error is eliminated by setting the time base gating oscillator to WWV.  A COUNT position on the mode switch permits using the 244 as a straight 50 kHz to 22 MHz frequency counter.  Includes cable.  Housed in matching enclosure.

===== Specifications =====
  ***Resolution:** 6 digits; least significant reads hundreds of Hertz.
  ***Digit Size:** 0.4".
  ***Digit Color:** MHz and kHz digits red; hundreds of Hertz digit green.
  ***Input Voltage:** 75 mV min. 1 - 25 MHz, rising to 50 mV @ 50 kHz.
  ***Frequency Range:** 500 kHz to 22 MHz, min.
  ***Panel Controls:** 5 pos. MODE Switch (OFF, 1.8-2, 3.5-7.5, 14-30, COUNT)
  ***Semiconductors:** 1 LSI, 6 ICs, 20 transistors, 9 diodes.
  ***Power Required:** Provided by 540/544 transceivers (required 12-15 VDC @ 500 mA max).
  ***Size:** HWD 2.5" x 10.375" x 6.5".
  ***Weight:** 1 lb., 14 oz.