User manual ELECTRO-VOICE 660A DATASHEET
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Manual abstract: user guide ELECTRO-VOICE 660ADATASHEET
Detailed instructions for use are in the User's Guide.
[. . . ] The audio input can be mixed with the 660A internally generated audio signals (e. g. gong signals with announcements), or given out as priority at the audio output (programmable).
The audio quality of the messages can be selected, depending on memory extension and different user requirements. With maximum memory extension, a total recording time of 16 minutes is possible. For "EASY-USER", the provided operation features are similar to those known from cassette recorders or CD players. [. . . ] 6 Pressing the soft key "set" stores the above mentioned settings and actives them immediately.
The level of the control inputs are periodically monitored by the processor. Thus, shorter impulses, spikes or quick AC voltages are recognized inaccurate or with a delay (undersampling). The bi-polar control inputs evaluate both half-waves of AC voltages.
Examples for trigger settings
Ts = sample delay, Ts typ = 30 msec, Ts min = 0 msec, Ts max = 100 msec If the control input is ON for at least 0. 6 seconds (Tdel + Ts max) and no other sequence with a higher priority is currently running, the sequence 23 is started once. The end of the starting impulse is arbitrary.
Sequence 21 is initiated when the control input is without power for at least 0. 2 seconds and no other sequence with a higher priority is currently running. Since the control input is still low at the end of the sequence, S21 starts once again.
If this control line's (watchdog) level is not altered for a period longer than 1. 0 seconds, the sequence 02 is launched. If a sequence with a higher priority is currently running, the newly selected sequence will only be initiated after completion of the sequence with the higher priority. Please be aware of the fact, that the truthful recognition of level alterations is only possible when they are applied for a longer period than 100 msec (see trigger recognition).
Sequences are a series of single steps, determining the functions of the 660A step by step. Thus, providing the possibility to define signal sequences, volume levels, trigger outputs, time sequences, loops, etc. However, for test purposes it is possible to start a sequence via menu command. A sequence preset can consist of maximally 50 single steps.
20 freely programmable presets (user presets) from S00 - S19 are provided. The functions of the factory presets S20-S37 are explained in tables on the pages 36 - 44. Gong, alarm fade out, messages and announcements are finished, recording is stopped.
DMM= Sum= Bypass
-xx dB -xx dB set clr inv prl sum Mxx
-controls of the 660A audio signal is set to -xx dB (*0 dB default) -control of the input - output XLR connection is set to -xx dB -analog bypass relay, direct connection XLR input - output closed -analog bypass relay, no relay connection XLR input - output -inverted analog bypass relay -switches the started DMM audio signals to pre-listen outputs (Pre-Listen only) -switches the started DMM audio signals to pre-listen and sum outputs (*default) -ends a currently running audio signal immediately and starts the recording of the message xx. At first this message is being erased and then recording starts at the last adjusted recording level. The execution time lasts until End Delete Message (start of recording). -sets a timer to ttt, t seconds and starts measuring this time (sand glass). With every "if count"-command the counter is decremented by 1 until 0 is reached. -resumes the sequence at step number xx.
ttt, t s xxxx
-only executes the next step number if the delay time has elapsed (see command Dly). The next step number is executed only if the counter has reached 0 (see command Count). If the counter value is greater than 0, the next step number is being skipped. Audio -executes the next step number only if the audio signal started at last is finished (see command start), otherwise the next step number is being skipped. In X, Y Z -executes the next step number only if the desired level Z (H or L) is applied at input Y (1 . . 4) of the I/O module X (A. . D). If this condition is not fulfilled, the next step number is being skipped. [. . . ] Look for the cause that generates the problem and try to solve it - otherwise send the appliance to the manufacturer for servicing.
How do I replace a 4-tone gong signal by a 3-tone gong?In accordance to the factory presets, the trigger is connected to the control input B3 and it should stay that way. The sequence S 25 which initiates the 4-tone gong signal G 20 is being started using the input B3. The selected 4-tone gong signal G 20 has to be changed to the 3-tone gong signal G21 by altering line 9 of sequence S 25 (see also on page 39). [. . . ]
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