 APPLICATION
The Model 8850-2 Power Sweep Generator was developed in response to the demand for increased audio voltage from a low impedance source when performing CS101 conducted susceptibility test per MIL-STD-461D and E. This high power unit is especially suited for rapidly making
tests in the shielded room.
When used with the Type 6220-1A (or 6220-2) Audio Isolation Transformer, the combination enables the injection of sinewave audio voltages into active power lines supplying power to an Equipment Under Test (EUT).
DESCRIPTION
The Model 8850-2 Power Sweep Generator provides audio power in a manually tuned or sweeping mode for four frequency bands covering 20 Hz to 150 KHz. Sweep rate is 41/2 minutes per band, or 18 minutes for all bands in sequence. In the manual mode, a tuning knob controls the output frequency. Both the frequency in KHz and the output level in volts r.m.s. are continuously displayed on two digital meters.
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When used in conjunction with the Type 7021-1 Phase Shift Network and the Type 6220-1A Transformer, provision is made for sensing the audio voltage being injected into the EUT and displaying it on the digital panel meter. In this arrangement, the unit maintains a constant injection level (up to a maximum of 7.5 volts r.m.s.) as frequency is scanned or swept.
Maximum power output of the unit into a
1.5 ohm resistive load is over 300 watts and 200 watts into 2.5 ohms.The output voltage into a 0.5 ohm load connected to the secondary of the associated Type 6220-1A Transformer can be adjusted to a level in excess of ten volts at 1.0 KHz.
FEATURES
- Manual or automatic frequency sweep from 20 Hz to 150 KHz.
- Digital display of frequency and output
voltage level or injection voltage level.
- Remote sensing of voltage being
injected into the Equipment Under Test.
- Automatic leveling of output voltage as
frequency is scanned or swept.
- Protective circuits prevent damage
to output stages caused by power frequency feedback in typical a.c.
test setups.
- Low output impedance for greater transfer of audio power.
- Up to 300 watts output into 1.5 ohm resistive load and 200 watts into
2.5 ohms.
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AVAILABLE ACCESSORIES
Type 6220-1A Audio Isolation Transformer.Use for injecting output of 8850-2 in series with power line to test sample as required by test method CS101.
Type 7021-1 Phase Shift Network.Use for removing the power frequency from the voltmeter in CS101 tests.
Type 8810-1 Impedance Matching Transformer. Plugs into output terminals to step up the output to 50 ohms Impedance. Use when a 50
ohm signal source is needed.
Type 8811-1 Wide Range Transformer. Plugs into output terminals to provide up to 115 volts
r.m.s. at 200 watts. Use as a power source for frequencies from 30 Hz to over 2 KHz.
Type 9138-1 Step-up Transformer.Plugs into output terminals to provide up to 2 KV into 20,000 ohm load, 3 KHz to 30 KHz.
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