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MACRO range installation manual. Issue 6
Page 8
MICROPHONE & LINE INPUT MODULES
M24 Universal low impedance transformer balanced, priority/passive
M26 Low imp. transformer balanced, with priority, chimes and CDM
M28 Low impedance transformer balanced, audio operated priority
M30 Low impedance transformer balanced, priority/passive, phantom DC
L24 600 ohm transformer balanced priority/passive, 50mV - .775V
L25 10k ohm transformer balanced priority/passive, 50mV - .775V
L26 47k ohm transformer balanced priority/passive, 50mV - 80V
L27 600 ohm transformer balanced, priority, chime, CDM. 50mV - .775V
L28 10k ohm transformer balanced, priority, chime, CDM. 50mV - .775V
L29 47k ohm transformer balanced, priority, chime, CDM 50mV - 80V
L30 600 ohm transformer bal., audio activated priority, 50mV - .775V
L31 10k ohm transformer bal., audio activated priority, 50mV - .775V
L32 47k ohm transformer bal., audio activated priority, 50mV - 80V
L33 Aux unbalanced line, 50mV & .775V, priority/passive
L34 Aux unbalanced line, 50mV & .775V, priority, chimes (no CDM)
NON-PRIORITY MODULES
E26 RIAA equalised 5mV @ 50K for magnetic phono cartridge
Flat response, 80mV to 1V for ceramic phone cartridge
TONE GENERATOR MODULES
T24 1kHz sine wave generator, momentary triggering
T25 Time pips, with timer, priority hold & memory
T26 Repeating gongs with timer, priority hold & memory
T27 Alternating dee-dah alarm with timer, priority hold & memory
T28 Warble alarm with timer, priority hold & memory
T30 Trimphone telephone simulator, momentary triggering
T32 Triple chimes with timer, priority hold, & memory
T34 Slow whoop with timer & priority hold
Table 1 The current range of input modules
Module features & general specifications
MICROPHONE INPUT MODULES M24 M26 M28 M30
Transformer or Electronic balanced T T T T
Priority only or priority/passive option PP PO PO PP
Priority controlled current sink """"
Chimes & Chime Duration Monitor sink "
Phantom DC supply "
Audio activated priority (VOX) "
Bass cut facility """"
GENERAL SPECIFICATIONS - MICROPHONE INPUT MODULES
Sensitivity range 100uV to 2mV
Input impedance Suitable for 200 ohm microphones
Frequency response -3dB points 20Hz - 20kHz
Bass cut response -3dB @ 200Hz -6dB @ 100Hz
Signal to noise ratio 58dB minimum
Input overload capability 50dB
Sink capability (mA max. continuous) 250mA
Phantom supply +15V via 1k0
VOX delay 3 seconds maximum