Handbook for Sound Engineers

1072 Chapter 28 dried out on the recording tape. Sticky adhesive residue that could bond to adjacent layers, on the other hand, ...

Magnetic Recording and Playback 1073 Second, avoiding elevated temperatures and stray magnetic fields during use and storage wil ...

1074 Chapter 28 Since both types of sticky shed problems are treated by baking, most people who bake tapes don’t know for certai ...

Magnetic Recording and Playback 1075 higher, more usable level by the first stage of the play- back amplifier. Special low-noise ...

1076 Chapter 28 28.4.2 Record Circuits The primary task of the amplifier that drives the record head is to convert the input aud ...

Magnetic Recording and Playback 1077 output to the head for constant current drive must still be overcome, however, by including ...

1078 Chapter 28 28.4.3 Bias and Erase Circuits The high-frequency signals required for biasing and erasing all tracks of the tap ...

Magnetic Recording and Playback 1079 recorder performance to a level that rivals digital recorders. DBX is also a “compander” sy ...

1080 Chapter 28 to account for fixed and variable timing errors. A 4/6 Modulator adds bits to the data to create easily recog- n ...

Magnetic Recording and Playback 1081 of stereo audio, a very compact digital recorder, Fig. 28-47, has been made possible. New h ...

1082 Chapter 28 wider bandwidth, however, requires a method of actu- ally sensing any errors when the head begins to slip off th ...

Magnetic Recording and Playback 1083 magnetic field. The rear layer of the sandwich shown in Fig. 28-53 has a fixed or pinned ma ...

1084 Chapter 28 computer or storage system to furnish startup or diag- nostic information, much like a boot ROM in today’s compu ...

Magnetic Recording and Playback 1085 the read/write/erase head assembly, and process the data to and from the disk. The spinning ...

1086 Chapter 28 maintains alignment of the coil as the head moves in a straight line along a radius of the disk. A rotary actuat ...

Magnetic Recording and Playback 1087 ting and buffering to handshake with the host computer system. The hard disk data path is m ...

1088 Chapter 28 hard disk drives are cheap enough to just store the hard drive as the archival copy. This strategy is fraught wi ...

Magnetic Recording and Playback 1089 head with the stick or core of the swab. Allow adequate time, typically 30 s, for the solve ...

1090 Chapter 28 difference between the tape tension on the playback machine and the tension value used by the manufacturer of th ...

Magnetic Recording and Playback 1091 under all conditions of tape pack and speed. Induction motors, which do not run at synchron ...