Tabor Electronics 5251, User Manual, Page: 298 / 298

TE5251
User Manual
A-8
Counter/Timer Characteristics
Operation The 5251 has a special mode where the instrument
type is transformed to operate as a counter/timer.
When this mode is selected, the operation of the
arbitrary waveform and its outputs are disabled
Measurement Functions Frequency, Period, Period Averaged, Pulse Width
and Totalize
Frequency, Period Averaged
Frequency Range 20 Hz to 100 MHz (typically >120 MHz)
Period Averaged Range 10 ns to 50 ms
Resolution 7 digits in one second of gate time, reduced
proportionally with lower gate times
Period, Pulse Width
Range 500 ns to 50 ms
Resolution 100 ns
Totalize
Frequency Range 20 Hz to 100 MHz
Accumulation Range 10
12
-1
General
Input Front panel TRIG IN, BNC connector
Trigger Level Range ±5 V
Sensitivity 500 mVp-p
Damage Level ±12 V
Minimum Pulse Width
≥10 ns
Slope Positive/Negative transitions, selectable
Gate Time 100 µs to 1 s
Reading Modes
Repetitive Continuous measurements are executed when
signal is present at the input
Hold Single measurement is executed upon command
Gated Active in Gated Totalize mode only
Time Base
Type TCXO
Temperature Stability 1 ppm, 0

C - 40

C
Long Term Stability 1 ppm, 1 year
General
Power Requirements 22 W maximum
Current Consumption +5 V - 185 mA
+12 V - 900 mA
+3.3 V - 2.6 A
EMC Certification CE marked
Operating temperature 0

C - 40

C
Safety Designed to meet IEC 61010-1, UL 3111-1, CSA 22.2 #1010
Workmanship Standards Conform to IPC-A-610D