16
BMA-125 120V Test Procedures
12. Input 3, 4
12.1 Perform the test procedure 11, if the
optional input module is installed.
13. MIC PAGE INPUT
13.1 Apply a 800
µ
Vrms, 1KHz signal to
the MIC PAGE INPUT. Rotate the PAGE
LEVEL pot to the full clockwise position.
13.2 Reference a dB meter to the applied
signal.
13.3 Measure the LINE output. It should be
60 dB
±
4 dB.
14. Model 8, 32 EQ
Note: Connect J1 to the EQ PCB. This will
insert the internal EQ. Do this if J1 was
disconnected according to the general test
setup procedure.
14.1 Apply a 100mVrms, 1KHz signal to
Input Five. Move the EQ selector switch to
the Model 8 position.
14.2 Adjust the Master and Input Five gain
controls to obtain a 5Vrms output from the
4
Ω
output.
14.3 Reference a dB meter to the 4
Ω
output. Measure the response according to
the following table.
Frequency
Output
(dB)
Tolerence
(dB)
20Hz
-20.3
±
3
85Hz
13.2
±
1.5
250Hz
3.7
±
1.5
500Hz
.9
±
1.5
1KHz
ref
-
5KHz
5.8
±
1.5
12.5KHz
12.4
+.85,-2.15
20KHz
2.1
±
3
14.4 Move the EQ selector switch to the
Model 32 position. Measure the response
according to the following table.
230V Variation Tests
Note: Perform all the proceeding tests
except 3, 4 and 5.
1. Remote Master Volume
1.1 Apply a 100mV, 1KHz signal to Input
Five.
1.2 Connect a 4
Ω
load to the 4
Ω
output.
1.3 Adjust Input Five and the Master
volume control so that 24Vrms is measured
across the 4
Ω
load.
1.4 Reference a dB meter to the 4
Ω
output.
1.5 Connect a 10K
Ω
pot to the terminals
marked Remote Master. Rotate the pot to
its minimum resistance position. Measure
the 4
Ω
output. It should be
≤
-40dB.
2. 100V Output
Note: Remove the 4
Ω
to PRI jumper and
connect a 80
Ω
load to the 100V output.
2.1 Apply a 100mVrms, 1KHz signal to the
100V output.
2.2 Adjust Input Five to the full clockwise
position. Adjust the Master volume control
so that 100Vrms is measured across the
80
Ω
load. The signal should look clean.
Frequency
Output (dB)
Tolerence (dB)
20Hz
-18.4
±
3
85Hz
14.5
±
1.5
250Hz
4.3
±
1.5
500Hz
1.2
±
1.5
1KHz
ref
-
5KHz
9.2
±
1.5
12.5KHz
15.5
+.8, -2.2
20KHz
5.4
±
3
Summary of Contents for FREESPACE BMA-125
Page 39: ...Figure 2 2B37 Schematic and PCB Layout 39...
Page 40: ...Figure 3 2B50 Schematic and PCB Layout 40...
Page 41: ...Figure 4 120V Driver PCB Layout Figure 5 120V Tone Volume Control PCB Layout 41...
Page 43: ...Figure 8 230V Driver PCB Layout 43...
Page 44: ...Figure 9 230V Tone Volume Equalizer PCB Layout 44...
Page 45: ...Figure 10 230V Wiring Diagram Part 1 45...
Page 46: ...Figure 11 230V Wiring Diagram Part 2 46...
Page 47: ...47...
