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AM700 Audio Measurement Set Service Manual
5–1
Adjustment Procedures
The procedures in this section are designed to adjust the circuitry of the AM700
Audio Measurement Set to return it to specified accuracy.
Test Equipment Required
The test equipment needed to perform the adjustment procedures is listed in
Table 5–1. Use the test equipment shown or an equivalent to do the adjustments.
If the example test equipment is not available, check the Minimum Specification
column to determine if you can use another piece of test equipment. If you use
other test equipment, the controls and connectors for that equipment may be
different from those called out for the example test equipment. Refer to the
appropriate operator’s manuals for operation of the test equipment.
Table 5–1: Equipment required list
Equipment Minimum specification Purpose Example
Analog oscilloscope Dual Channel, 50 W input
termination, 300 MHz BW,
external triggering
Viewing video signals Tektronix 2465
Digital audio signal
measurement set
Digital audio signal source and
digital audio signal analyzer
Provide digital audio signals to
the AM700 being adjusted.
Tektronix AM700 (Test AM)
Digitizing oscilloscope Make voltage and frequency
adjustments
Tektronix TDS540
Digital multimeter Make voltage adjustments Tektronix Digital Multimeter
DM2510
1
RMS meter Accuracy 1%, resolution 5
digits; balanced input
Making generator output adjust-
ments
Hewlett-Packard HP3458A
or Fluke 8506A or 8505A–09
Precision Audio Analyzer Frequency Accuracy:
±0.01%; level flatness: (20 Hz
to 80 kHz): ≤0.05 dB; level
accuracy (20 Hz to 80 kHz):
≤0.02 dB; residual distortion:
0.0010% (–100 dB)
Provide precision audio signals
and make precision audio
measurements.
ShibaSoku AM51A Audio
Analyzer
Photometer Visible light level up to 300 fl. Adjust brightness level of the
CRT display.
Tektronix J17 Lumacolor meter
with Tektronix J1803 Luminance
Head
Adjustment tool Flat-tip screwdriver, 3/16 inch
tip.
Adjust variable adjustment
controls
Interconnection cable XLR female to dual-banana Signal interconnection Customer fabricated