SP395 SoundPro Audio Integrator
Form7492
Operation Manual
88
1.
Test Function –
Identifies Impedance Sweep as the active test function.
2.
Impedance Scale
–This field sets the ohms full-scale range that is represented by the
vertical scale. The full scale value can be set to
20
,
50
,
100
,
200
,
500
,
1000
,
2000
,
4000
,
or
8000
ohms. To change the full-scale value, use the control knob to highlight the field
and click to underline it. Then rotate the control knob to select the desired value, and
click to accept the value.
3.
Graphed Measurement Data
– Measurement data of impedance vs. frequency.
4.
Minimum Test Frequency
– Sets the minimum frequency used in impedance sweep.
Sets the low end frequency of the graph.
5.
Sweep Interval
– Selects the time of the Impedance Sweep from 10 to 99 seconds. Select
the field and vary the control knob to increase or decrease the sweep time interval.
6.
Cursor Frequency
– Indicates the frequency at the position of the graph cursor. Select
the field and vary the control knob to move and position the cursor to the desired
frequency step.
7.
Cursor Ohms Measurement
– Measured value of ohms at the frequency selected by the
cursor.
8.
Maximum Test Frequency
– Sets the maximum frequency used in the impedance sweep
test. Set the high end frequency of the graphed data.
9.
Generator/Impedance Sweep On/
Off – Turns on or off the Impedance Sweep function.
10.
Indicates the audio frequency steps as the Impedance Sweep test is performed.
Impedance Sweep Operation
1.
Connect the special cable to device or system.
Use the specialty Impedance Test Cable,
Sencore #39G1171. Plug this connector into the 1/4” TRS output (phone) jack, next to the
male XLR output jack.
•
(Disconnect the load from any power amplifier for best results and safe operation.)
2.
Set the sweep endpoints.
Using the fields on the bottom of the graph, set the sweep start
and stop frequencies. The lowest frequency is 20Hz; the highest frequency is 20 kHz.
3.
Start / Stop
Start the test by turning on the generator. Wait for the sweep to finish. You
can stop a test by turning off the generator while the test is running.
4.
View the results.
You can change the graph window by using the field on the upper left
of the graph window. This field sets the top Ohms value for the graph.
5.
Cursor
Use the cursor to display the exact impedance of any point on the screen.
Memories
The results of the Impedance Sweep test can be stored in any of the 40 non-volatile memories,
using the icons on the bottom toolbar. To access the memories, follow these steps:
•
Select a memory number
Use the memory number field to select a memory number.
When the memory number field is selected, the type of memory stored (or “---“ if
empty) will appear on the bottom of the graph. The memory designation for the
impedance sweep is “Imp”.
•
Store memory.
Click on the S (Store) icon to store the memory to the current memory
number.
•
Recall memory.
To recall a memory, click the R (Recall) icon. If the memory is the
wrong type, an error message will appear momentarily.
