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839 
White Oak, Silver Spring 19, Marvlend 
NAVAL ORDNANCE LABORATORY MEMORANDUM 104,67 
14 November 1949 
Otto Meier, Jr. (SE) 
G. Ke Hartmann (SE) 
E. Swift, Jr. (SE) 
A Study of Piezoelectric Gauge Cable Termination. 
(Task NOL-37-Re2c-3-1). 
This memorandum gives data resulting from a study of the simple 
R-C cable compensation network developed by Lampson. Calculations 
and measurements are included for both the steady-state and step- 
transient response of the cable and termination. The steady-state 
response of a specified length of cable having known values of 
characteristic impedance and total capacitance can be predicted 
from these data, for wide ranges of terminating resistance and 
capacity. The corresponding step-transient response can also 
be predicted. For example, it is found that the initial overshoot 
of the transient response can be eliminated entirely by the 
proper choice of terminating resistance. 
The data and conclusions presented here are primarily for the use 
of the Explosives Division, but should be generally useful in the 
selection of the best values of piezoelectric gauge cable terminating 
resistance and capacity to be used with specified lengths of any 
cable having known constants. The interpretations herein are those 
of the author and are not necessarily views of the Naval Ordnance 
Laboratory. 
(a) OSRD 4561; "The Use of Electrical Cable with Piezoelectric 
Gauges", R. H. Cole; 12 December 1944. 
(b) OSRD 1179, (NDRC Memo. A-63M); "Cable Compensation for 
Piezoelectric Gauges", C. W. Lampson; 18 January 1943. 
(A) Plate 2; Calculated Steady-State Cable Response, Terminating 
Capacity Equal to Cable Capacity. 
(B) Plate 3; Calculated Steady-State Cable Response, Terminating 
Capacity Two Times Cable Capacity. 
(Cc) Plate 4; Calculated Steady-State Cable Response, Terminating 
Capacity Four Times Cable Capacity. 
(D) Plate 5; Calculated Steady-State Cable Response, Terminating 
Capacity Six Times Cable Capacity. 
NOIM 101,67 
