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AG-51 Audio Generator
PDF Brochure |
DESCRIPTION
The AG-51 Audio Generator contains a low distortion 20 Hz to 200 kHz
sine wave generator, an SMPTE standard intermodulation signal generator
and a fixed frequency sine wave generator at 3.15 kHz for wow and
flutter tests. Signal outputs are simultaneously available at levels
of up to +20 dBm (equivalent sine wave power for complex signals)
at separate left (L OUT) and right (R OUT) output connectors. Outputs
may be selected for left (L) only, right (R) only, left and right
in phase (L+R), and left and right in phase opposition (L-R). Fully
balanced or unbalanced outputs at impedance levels 150 ohms or 600
ohms are front panel selectable. Three precision attenuators (10,
1.0 and 0.1 dB) provide a dynamic range of 99.9 dB in 0.1 dB steps.
Attenuator dials display the output level directly in dBm in the 150
ohm source impedance configuration. Automatic output leveling circuitry
with a built-in self-test feature provides a constant output level
thereby eliminating the need for output metering. In the TEST mode
the generator output level is reduced to zero, a useful feature during
noise measurements.
The time constant of the leveling control loop is determined by a
front panel switch. For rapid frequency response measurements, this
switch is set to the FAST RESPONSE position. This feature enables
the operator to evaluate frequency response of the device under test
(amplifier, filter, etc.) with a manual sweep of the frequency dial
and multiplier switch. For distortion measurements, the switch is
set to the LOW DIST position. This mode of operation provides minimum
distortion with a slightly longer control loop time constant for accurate
signal analysis at any specific frequency. |
| AG-51
SPECIFICATIONS |
| Frequency Range: |
20Hz to 200kHz in four decade ranges |
Outputs:
L
R
L+R
L-R
IM SIG
3.15 KHz
|
Left only
Right only
Left & Right in phase
Left & Right 180° out of phase
Composite 60Hz & 7kHz @ 4:1 ratio,
(SMPTE Standard)
Fixed wow & flutter signal,
(IEEE Standard 193-1971) |
Output Impedance
Unbalanced
Fully Balanced |
150 or 600 ohms, switch selected
150 or 600 ohms, switch selected |
Output Level (no atten.)
Sine Wave Signals
IM Signal |
+20dBm (7.75 V) across 600 ohm load,
15.5 V open circuit
0dBm (0.387 V) across 150 ohm load,
0.774 V open circuit
Peak-to-peak voltage of composite waveform is equal to peak-to-peak
voltage of +20dBm sine wave across 600 ohm load, 0dB sine wave across
150 ohm load |
| Output Level Accuracy |
± db (20Hz - 100kHz)
± dB (100kHz - 200kHz) |
| Attenuation Range |
0 to 99.9 dB in 0.1dB steps |
Attentuation Accuracy
0 to 10 db
>10 db |
± 1.5% of attenuation in dB
± 2dB (maximum) |
Intrinsic Distortion *
Harmonic:
20Hz - 10kHz
10kHz - 20kHz
Intermodulation
Incidental FM(3.15kHz) |
Low Distortion: Fast
Response:
less than 0.05% less
than 1%
less than 0.8% less
than 1%
less than 0.03%
less than 0.01% |
| Hum and Noise |
less than 80 dB below rated output |
| Dial Accuracy |
± 3% |
| Power |
117 Vac, (230 Vac option) 50/60 Hz,
9W |
Weight
with cover, lb. (kg) |
12 (5.44) |
Dimensions
Optional Raction Mount |
15.25 (38.74) W; 5.25
(13.34) H;
10.13 (25.75) D
5.25 (13.34) Rack space required |
| * Slightly higher R output in L-R,
UNBAL mode. |
Specifications subject to change without notice.
|
- Transformerless Stereo Outputs (balanced or unbalanced)
- Output Level +20 dBm across 600 ohms 0 dBm across
150 ohms
- Stereo Matrix Switch L, R, L-R, L+R
- Precision 10 dB, 1.0 dB, and 0.1 db Step Attenuators
- High Level of RF Shielding
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