Frequency Counter  (220-0305)   Specifications          Faxback Doc. # 8657

GENERAL

Gate Time:....................................64 mS (Fast); 640 mS (Slow)
Display:...........................................8-Digit Liquid Crystal
Display Update Rate:........................................128 mS (Fast)
                                                             128 S (Slow)
Display Resolution:..........................................1 kHz (Fast)
                                                            100 Hz (Slow)
Accuracy (when AC powered):...........1 ppm +/- 1 Least Significant Digit
Operating Temperature:..........+64 degrees F (+18 degrees C)/+95 degrees
                                F (+35 degrees C)
Power Requirements:.......4 x AA Alkaline Batteries (Cat. No. 23-552), or
                         4 x AA NICAD Batteries (Cat. No. 23-125), and/or
                                          9 VDC Adapter (Cat.No.273-1455)
Low Power Detect:........................................4.1 V +/-0.15 V.
Backlight On Time:...............................10 Seconds +/- 5 Seconds

INPUT CHARACTERISTICS

Range:...................................................1 MHz to 1.3 GHz
Sensitivity:.................................150 mV min. 1 MHz to 1.3 GHz
Dynamic Range:...........................................10 mV to 1 V rms
Coupling:..............................................................AC
Input Impedance:..........................................50 ohms or Hi-Z
Absolute Maximum Input Level:...................................1.4 V p-p
                 (You might damage the counter if you exteed this level.)

TIMEBASE

Frequency:..........................................................4 MHz
Initial Accuracy:...................................................1 ppm

TABLE 1

Typical Input Sensitivity (50 ohms Mode)
Frequency.......Sensitivity.....Frequency...........Sensitivity
  (MHz).............(mV).........(MHz).................(mV)
0.2500..............100............50,0000................9
0.3000..............60.............60.0000................8
0.4000..............40.............70.0000...............11
0.5000..............25.............80.0000...............11
0.6000..............20.............90.0000...............10
0.7000..............18............100.0000................8
0.8000..............18............200.0000................5
0.9000..............14............300.0000................5
1.0000..............13............400.0000................8
2.0000...............7............500.0000................5
3.000................5............600.0000................6
4.0000...............5............700.0000................8
5.0000...............3............800.0000................8
6.0000...............3............900.0000...............11
7.0000...............3..........1000.0000................13
8.0000...............3..........1100.0000................20
9.0000...............3..........1200.0000................31
10.0000..............2..........1300.0000................44
20.0000..............2..........1400.0000................60
30.0000..............3..........1500.0000................90
40.0000..............9..........1600.0000...............145

(LB/all-06/30/94)