AEROGRAPHER'S MATE 3 & 2 



The operating instructions (fig. 7-8) for the 

 Alden 18 are as follows: 



MARK/TEST switch to the OFF position (cen- 

 ter) and push the STOP button. 



1. TURN ON PROCEDURE. The recorder is 

 turned on by turning the POWER switch to the 

 ON position. When the red power ON indicator 

 illuminates, the recorder is in the standby 

 mode and ready to start. 



2. SIGNAL LEVEL CHECK. If a signal is 

 absent, the recorder will run by pressing the 

 manual START switch, but it will not print. 

 To check for a signal, turn the VOLUME LEVEL 

 control up (clockwise) and listen for a signal 

 tone of disks in the speaker. If no sound is 

 hea^d, check the operation of the equipment 

 by switching the MARK/TEST switch to ON 

 and push the START button. If it marks the 

 paper, this tells you the set is working but 

 no signal is biing transmitted. Now return the 



3. AUTOMATIC CONTROL OF RECORDER. 

 When set for this mode of operation, it will 

 start, phase, printout, and stop automatically 

 from the standard facsimile control signals 

 transmitted over landlines. If fast feed of the 

 paper is required, set the FAST FEED switch 

 to the AUTO position. 



4. MANUAL OPERATION. The recorder may 

 be started manually, without the need for a 

 start command, by depressing the START button 

 on the Recorder Control Chassis front panel. 

 Phasing is then accomplished by pressing the 

 PHASE button on the front panel of the re- 

 corder. This is done only momentarily, noting 

 the position of the left-hand edge of the re- 

 corded map. If not phased, continue this pro- 



RECORDER CONTROL CHASSIS 



FRONT PANEL. The Recorder Front Ponel is divided into five 

 functional sections. The controls for each section are described 

 below. 



AUXILIARY/ON-OFF SECTION 



FAST FEED Switch: Provides manual fast feed of record 

 paper from the Recorder when placed in the momentary MAN 

 position. When placed in the AUTO position, the Recorder 

 will "Fast Feed" the ALFAX paper for o preset time on eith 

 the automatic or manual STOP command. Center position: 

 AUTO/MAN fast feed is off. 



MARK/TEST Switch: When placed in the ON position, the 

 Recorder will print out vertical solid dark bars regardless 

 input signal applied. The momentary on EVENT position i< 

 used to mark the paper when any significant event occurs. 

 Recorder will print out solid dark copy in the EVENT posit 

 Center position: off. 



POWER Switch: Provides power ON/OFF to the Low Volta 

 Marking Amplifier and Precision AC power supplies. 



Power ON Indicator: When lighted, indicates power is ON 

 Recorder Control Chassis and Recorder Head. 



MARKING AMPLIFIER SECTION 



MAP-AUTO-APT: Selects MAP or APT operation. Th_ 

 AUTO position provides automatically controlled MAP or 

 APT mode operation in accordance with the transmitted 

 signal from the Scanner. In APT position, the Recorder 

 will not start automatically unless a 1209 Hz tone precedes 

 the 300 Hz start tone. In MAP position, the Recorder will 

 operate from all command tones, but will not go to APT mode 

 of inverted printout. 



DENSITY LEVEL Control: Provides marking density increase 

 and decrease adjustment. Results are observed on recorded 

 copy. Should normally be operated 3/4 clockwise position. 



COMMAND SECTION 



START: When depressed, provide 

 Recorder. 



l manual storting of the 



PHASE: When lighted, indicates the phasing cycle. Wher 

 depressed, provides manual phasing of the Recorder. 



STOP: When depressed, provides manual stopping of the 

 Recorder. 



AUDIO OUTPUT SECTION 



VOLUME Control: Provides adjustment of the audio output 

 level of the incoming signal. 



Speaker: Provides aural indication of the incoming signal 



MOTOR DRIVE SECTION 



HELIX SPEED SELECT (rpm): Selects 120 or 240 rpm. The 

 AUTO position provides automatically controlled speeds from 

 the scanner. ™ 



PAPER-FEED SPEED SELECT (Ipi): Selects 96, 48, or 45 

 lines per inch. The AUTO position provides automatically 

 controlled speeds from the scanner. 



209.436 



Figure 7-8. — Alden Model 18 operating controls and their functions. 



130 



