AudioQuest M-27 User Manual
Switch Positions
Switch 1 and 2 select the M-27 functions.
Switch 1 and 2 are read only on RESET and when the battery is replaced.
Switch 3 selects printer options.
Switch 3 is read at the start of each printout and may be changed without destroying data.
SWITCH 1
Position 1 On = "C" weighting Off = "A"
Position 2 On = 30 dB Range Off = 50 dB Range
Position 3 In 30 dB Range
On = 115 dB U.L. Off = 90 dB U.L.
In 50 dB Range
On = 140 dB U.L. Off = 115 dB U.L.
Position 4 On = Fast Off = Slow
Positions 5 6 Criterion Level
Off Off =80 dB
Off On =84 dB
On Off =85 dB
On On =90 dB
Positions 7 8 Exchange Rate
Off Off = 3 dB
Off On = 4 dB
On Off = 5 dB
On On = 6 dB
SWITCH 2
Positions 1
2
3
4
HTL
LTL
Off
Off
Off
Off
= 70
dB
none
Off
Off
Off
On
- 70
dB
none
Off
Off
On
Off
= 75
dB
none
Off
Off
On
On
= 80
dB
none
Off
On
Off
Off
= 85
dB
none
Off
On
Off
On
= 90
dB
none
Off
On
On
Off
- 75
dB
70 dB
Off
On
On
On
= 80
dB
70 dB
On
Off
Off
Off
= 85
dB
70 dB
On
Off
Off
On
= 90
dB
70dB
On
Off
On
Off
= 80
dB
75 dB
On
Off
On
On
= 85
dB
75 dB
On
On
Off
Off
= 90
dB
75 dB
On
On
Off
On
= 85
dB
80 dB
On
On
On
Off
= 90
dB
80 dB
On
On
On
On
= 90
dB
85 dB
Position 5 On =
24 hour
Off
= 12
hour
Position 6
7
8
Unit
Off
Off
Off
= 0
Off
Off
On
= 1
Off
On
Off
= 2
Off
On
On
= 3
On
Off
Off
= 4
On
Off
On
= 5
On
On
Off
= 6
On
On
On
= 7
SWITCH 3
Position 1 On = Busy
Off = Data Set Ready
handshake
Position 2 On = Parallel printer Off = Serial printer
Normally positions 1 and 2 are set the same.