1502C MTDR User Manual A–1
Appendix A: Specifications
The tables in this chapter list the characteristics and features that apply to this
instrument after it has had a warm-up period of at least five minutes.
The Performance Requirement column describes the limits of the Characteristic.
Supplemental Information describes features and typical values or other helpful
information.

Electrical Characteristics

Table A–1: Electrical Characteristics
Characteristic Performance Requirement Supplemental Information
Excitation Pulse
Reflected Pulse ≤200 ps (0.096 feet) Vp set to 0.99; 10 to 90%, into a precision short
Aberrations ±5% peak within 0 to 10 feet after rise
±0.5% peak beyond 10 feet Excluding front panel aberrations
Jitter ≤0.02 feet (≤40 ps) peak-to-peak Vp set to 0.99, DIST/DIV set to 0.1 ft/div
At 23.4 feet to 46.8 feet, jitter is ≤0.04 feet.
Output Impedance 50 W ±2% After risetime stabilizes into 50 W termination
Pulse Amplitude 300 mV nominal into 50 W load
Pulse Width 25 ms nominal
Pulse Repetition Time 200 ms nominal
Vertical
Scales 0.5 mr/div to 500 mr/div, >240 values Includes 1, 2, 5 sequences
Accuracy Within ±3% of full scale
Set Adj Set incident pulse within 3% Combined with VERT SCALE control
Vertical Position Any waveform point is moveable to center
screen
Displayed Noise ±5 mr peak or less, filter set to 1
±2 mr peak or less, filter set to 8
Input Susceptibility ±1 A Into diode clamps
Distance Cursor
Resolution 1/25th of 1 major division
Cursor Readout
Range –2 ft to ≥2,000 ft
Resolution 0.004 ft