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MIL-N-23182 Revision A, June 26, 1967
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NETWORKS, PULSE-FORMING, RADAR, GENERAL SPECIFICATION FOR
Includes all amendments and changes through Supplement 1, Cancellation Notice 1, March 31, 1999
Additional Comments: CNCL NO S/S
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This specification covers pulse-forming networks primarily intended for use in military radar equipment. This specification is intended to cover both pulse-forming networks and pulse-forming networks combined with additional elements, such as despiking networks which are functionally related to the pulse-forming network. This specification is not intended to cover networks weighing more than 300 pounds or having direct current (dc) test voltage ratings greater than 50,000 volts (50 kilovolts (kv)), nor is it intended to cover open-frame or encapsulated units.

The type designation for pulse-forming networks shall be in the following form, and as specified (see 3.1 and 6.1 ): CHART

Pulse-forming networks shall be identified by the two-letter symbol PN.

The sections shall be identified by a number which designates the applicable number of capacitance and inductance sections utilized by the network.

The electrical type is the circuitry type of configuration as shown on figure 1, and designated by one of the following letters: FIGURE 1.  Electrical configurations of pulse-forming networks (three section types illustrated).

The nominal pulse duration, expressed in nanoseconds, is identified by a three-digit number; the first and second digits designate significant figures and the third digit indicates the number of zeros to follow (tabulations in microseconds are given for information, in the specification sheet). For example: 262 indicates 2600 nanoseconds.

The voltage shall be identified by a single letter in accordance with table I which designates the rated dc peak working voltage expressed in kv, to which the network is charged. TABLE I Voltage.
Symbol     kv     Symbol     kv       Symbol     kv     Symbol     kv     
                                                                          
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A          1        F        7.5        L        20       R        45     
B          2        G       10.O        M        25       S        50     
C          3        H        2.5        N        30                       
D          4        J       15.O        P        35                       
E          5        K       17.5        Q        40                       
                                                                          




The frequency shall be identified by a three-digit number which designates maximum pulse repetition frequency (see 6.6.2) in pulses per second (pps). The first two digits represent significant figures and the last digit specifies the number of zeros to follow. For example: 152 indicates 1500 pps.

The class of pulse-forming networks shall be identified by a single letter, in accordance with table II denoting the maximum operating temperature for the realization of the life expectancy specified (see 3.1 ). The maximum operating temperature is defined as the allowable ambient temperature plus the temperature rise developed within the network. TABLE II.  Class.

The impedance shall be identified by a three-digit number which designates the nominal characteristic impedance (see 6.6.3) expressed in ohms. The first two digits represent significant figures and the last digit specifies the number of zeros to follow. For example: 150 indicates 15 ohms.