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Specifications
1–10
AM700 Audio Measurement Set Service Manual
Table 1–4: Analog generator specifications
Capabilities Description
Output characteristics
Number of Output Channels Two, labeled A and B
Signal Format Switchable between balanced and unbalanced.
Source Impedance Selectable between: 600 W, 150 W, and 10 W.
Minimum Typical Maximum
600 W 594 600 608
150 W 148.5 150 155
10 W (nominal) 9.5 11.8 13.5
A user-defined impedance may be used in place of either the 600 W or the
150 W source impedance. (Internal modification is required.)
Output Control Enable Switchable on-off, with terminating resistance remaining as selected.
Output Float Enable Switchable floating/grounded output.
Floating Mode
R to Ground ≈1 kW
Capacitance to Ground ≈1 nF (@ 1 kHz)
Maximum Float Voltage ±25 V peak
Channel Separation
High Resolution Mode ≥100 dB for frequencies ≥20 Hz
High Bandwidth Mode ≥70 dB for frequencies ≥70 Hz
Signals and control
All signals are generated digitally using software running on a DSP56002 digital-signal processor, driving audio digital-to-analog
converters.
Types of Signals Supported by Hardware Signals that are band limited to 80 kHz.
Independence of Generated Signal Outputs The hardware allows either stereo or mono mode generation. In stereo
mode, each channel is generated from a separate DAC, while for mono
mode, a signal DAC is used, followed by separate output drivers for each
channel (A and B).
The AM700 does not support stereo mode with the high bandwidth
generator.
Frequency related characteristics
Sine Wave Frequency Range
High Resolution Mode 10 Hz to 20 kHz
High Bandwidth Mode 11.719 Hz to 79992.188 kHz
Sine Wave Frequency Resolution
High Resolution Mode 0.1 Hz
High Bandwidth Mode 11.719 Hz