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Model 8904A | Replaceable Parts |
nable 6-1. Reference Designations
REFERENCE DESIGNATIONS
AT | A | assembly | E | . . . . . . .miscellaneous | P | ....... electrical connector | U | ......... integratedcircuit; |
. ..... attenuator; isolator; | F | electrical part |
| (movable portion); |
| microcircuit | ||
| termination | fuse | Q | ..........Plug transistor; SCR; | V | electron tube | ||
B . | . ............. | fan: motor | FL | filter | VR | ..................... voltage regulator; | ||
BT | ................. | battery | H | hardware | R | triode thyristor; FET | W | breakdown diode |
c | capacitor | HY | circulator | ................. resistor | ....... cable: transmission | |||
CP | ................ | coupler | J | electrical connector | RT | .............. thermistor |
| path; wire |
CR | . ........... diode; diode |
| (stationary portion); | S | .................. switch | X | .................. socket | |
| thyristor: varactor |
| jack | T | transformer | Y | ........ crystal unit (piezo- | |
DC | ....... directional coupler | K | relay | TB | .......... terminal board | 2 | electric or quartz) | |
DL | . , | delay line | L | coil; inductor | TC | ........... thermocouple | ........ tuned cavity; tuned | |
DS | ............ annunciator: | M | meter | TP | ............... test point |
| circuit | |
| signaling device | MP | miscellaneous |
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| (audible or visual); |
| mechanical part |
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| lamp; LED |
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Table 6-2. Abbreviations (1 of 2)
ABBREVIATIONS
ac | alternating current | COEF | ........... | coefficient | EDP | . . . | . . . . . .electronic data | INT | . . . . . . . . . . .internal | |
COM | ............. | common | ELECT | processing | kg | kilogram | ||||
ACCESS | .........accessory | COMP | ......... | composition | electrolytic |
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ADJ | adjustment | COMPL | ........... | complete | ENCAP | encapsulated | k | kilohm | ||
AID | CONN | ........... | connector | EXT | external | kV | kilovolt | |||
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| CP |
| cadmium plate | F | farad | Ib | pound | ||
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| CRT |
| FET | .... | LC | inductance- | |||
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| CTL |
| complementary |
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| ....... | capacitance | ||
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| CW | transistor logic |
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| LED ..... | |||
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| continuous wave |
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AL | aluminum | cw |
| clockwise | FM .... | frequency modulation |
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ALC | automatic level | cm |
| centimeter | FP . . . . | . . . . . . . . .front panel | LH | left hand | ||
| control | D/A . . . | . . . | . . | FREQ | frequency | LIM | limit | ||
| amplitude modulation | dB |
| decibel | FXD | . . . | . . . . . . . . . . . . . .fixed | LIN | . . linear taper (used | |
| ........... amplifier | dBm | . . .decibel referred | g | gram | in parts list) | ||||
APC . . . | . . . .automatic phase |
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| to 1 mW | GE | germanium | LK WASH | ...... lock washer | ||
ASSY . . | control | dc | . . . . .direct current | GHz | ............ | .gigahertz | LO | low; local oscillator | ||
. . . . . . . . . .assembly | deg . . | . . | . degree (temperature | GL | glass | LOG | logarithmic taper | |||
AUX | auxiliary | ...' | interval or difference) | GRD | . . . | . . . . . . . . .ground(ed) | (used in parts list) | |||
avg . | . . . . .average |
| degree (plane | H .... | ...... henry | log ' | . . . lcgarithm(ic) | |||
AWG | American wire |
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| angle) | h . . . | .._ | ....... hour | LPF | . low pass filter | |
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| OC . . . . | . . . | . . .degree Celsius | HET | . . heterodyne | LV . | ... low voltage | ||
BAL . . . . | . . . . . . . . . . .balance | OF . . . |
| (centigrade) | HEX . . . . | . . . . . . . . .hexagonal | m | meter (distance) | ||
BCD . . . | . . . . . . .binary coded | . . . | degree Fahrenheit | HD . | . . . | . . . . . . . . . . . . . .head | mA | milliampere | ||
BD . . . . | decimal | OK |
| degree Kelvin |
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| . . . . . . high frequency | MAX | . . . . . . . . maximum | |
. . . . . . . . . . . . .board | DEPC | . . . . .deposited carbon | IiF . | . . . | M | megohm | ||||
BECU | beryllium copper | DET |
| detector | HG | mercury | MEG | meg (lo6)(used | ||
BFO . . . . | . . . . .beat frequency | diam . . . | . . . | . . . . . . . .diameter | HI | . . . . . . . . . . . . . .high | in parts list) | |||
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| DIA . . . | . . . | .diameter (used in | HP | MET FLM | ........ metal film | |||
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| parts list) | HPF . . . | . . . . . . high pass filter | MET OX | metallic oxide | ||
BKDN . | . . . . . . . . .breakdown | DlFF AMPL | . . . . . . differential | HR . | . . . | . . . . . . .hour (used in | MF | . medium frequency; | ||
BP . . . . | . . . . . . . . . .bandpass |
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| amplifier |
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| parts list) | microfarad (used in | ||
BPF | bandpass filter | div . . . . | . . . | . . . . . . . . .division | HV . | . . . | . . . . . . . .high voltage |
| manufacturer | |
BRS . . . | . . . . . . . . . . . . .brass | DPDT . . | . . . | Hz | Hertz |
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BWO . . | DR . . |
| IC | . . . . integrated circuit | mg | milligram | ||||
CAL . . . | oscillator | . . . . . . . . . . . .drive | ID | . . . . . inside diameter | mH | . . . . . . . . millihenry | ||||
. . . . . . . . . . .calibrate | DSB . | . . . . | . . double sideband | IF . . | . . . | . . . . . . . .intermediate | ||||
ccw . . . . | . . . | DTL . . . | . . . | . . diode transistor | IMPG |
| frequency | mho . . . . | . . . . . . . . . . . . .mho | |
CER . . . | . . . . . . . . . . .ceramic |
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| logic | . . | . . . . . . . . impregnated | min | minute (time) | ||
CHAN . . | . . . . . . . . . . .channel | DVM . . | . . . | . . digital voltmeter | in | . . . . . . .incandescent | MlNAT | minute (plane angle) | ||
cm | . . . . . . . . . centimeter | ECL . . . | . . . | . . emitter coupled | INCL | . . . | . . . . . . . . . .include(s) | . . . . . . . . . miniature | ||
CMO . . . | . . cabinet mount only | EMF . |
| logic | INP .. . . | . . . . . . . . . . . . . . input | mm | . . . . . . . . millimeter | ||
COAX . . | . . . . . . . . . . . . coaxial | . . | electromotive force | INS . . . . | . . . . . . . . . . insulation |
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NOTE
All abbreviations in the parts list will b% in