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Specifications
1–4
AM700 Audio Measurement Set Service Manual
Characteristics
The performance limits in this specification are valid with the following
conditions:
H This instrument must have been calibrated/adjusted at an ambient tempera-
ture between +20° C and +30° C.
H The instrument must be in an environment with temperature, altitude,
humidity, and vibration within the operating limits described in Table 1–15
on page 1–24.
H The instrument must have had a warm-up period of at least 20 minutes.
H The instrument must have had its signal-path-compensation routine last
executed after at least a 20 minute warm-up period at an ambient temperature
within ±5° C of the current ambient temperature.
Any conditions that are unique to a particular characteristic are expressly stated
as part of that characteristic.
Table 1–2: Analog analyzer specifications
Capabilities Description
Input characteristics
Number of Input Channels Two channels: A and B
Input Type Balanced, differential
Input Impedance 100 kW per side in parallel with ≈ 300 pF (with no internal loads)
Internal Load Impedance 600 W, 150 W or 200 kW, software selectable
Vmax Internal Load Approximately 34.65 V peak or 24.5 V
RMS
(sinusoidal) at 600 W (+30 dBm)
Overload exerted for inputs peaks greater than +35 V
Maximum Input Voltage 176 V (DC + peak AC)
NOTE: Installation Category I – Signals must be isolated from the mains.
DO NOT CONNECT TO MAINS VOLTAGES.
Full Scale Input Ranges From –22 dBu (62.5 mV
RMS
) to +44 dBu (125 V
RMS
) in 12 6-dB steps
Input gain ranges are in 6 dB steps from –22 dBu to +8 dBu and in 12 dB
attenuator steps (with intermediate 6 dB gain steps) from +8 dBu to
+44 dBu.
Autoranging can be selected to switch the gain appropriately on the level of
the input signal.
Auto Ranging Input level sensing circuitry exists which allows software control of the input
gain and attenuation, automatically selecting the optimum dynamic range
for the current input level.
Minimum Input for ±1 dB Accuracy 1 mV (–57.8 dBu) (–36 dB on 62.5 mV scale) in “high resolution mode.”