Probably short for French Pamphile (“a given name"), special use of man's name.
(third-person singular simple present pams, present participle pamming, simple past and past participle pammed)
- To pan.
Probably alteration of pan.
pam - Computer Definition
A form of signal modulation in which the amplitude of the digital pulse carrier is modulated according to the amplitude level of the original signal. PAM samples an incoming analog signal, for example, measures its amplitude, and outputs a digital pulse of a representative amplitude. The outgoing pulse closely matches the amplitude of the incoming signal, but when digitized in an A-to-D converter, the digital output is the nearest of a number of standard amplitude values. PAM was used in this manner in early channel banks to interface analog PBXs and central offices (COs) to DS-1 digital circuits. The PAM-encoded signal subsequently was further encoded using pulse code modulation (PCM) before the signal was placed on the circuit. PAM is considered obsolete in this application, having been replaced by direct PCM-encoding of the analog signal, with the sampling performed by the same chips as contained in the A-to-D converter. However, variations on PAM remain widely used. Quadrature amplitude modulation (QAM) is such a variation. See also amplitude, channel bank, DS-1, modulation, PCM, and QAM.
(1) (Pulse Amplitude Modulation) The conversion of audio wave samples to pulses (voltages). PAM is the first step in pulse code modulation (PCM), which is followed by converting the pulses to digital numbers. See PCM.
(2) (Pluggable Authentication Modules) A programming interface that enables third-party security methods to be used in Unix. For example, smart cards, Kerberos and RSA technologies can be integrated with various Unix functions such as rlogin, telnet and ftp.