5. Verify output distortion less than .01 %.
7.1.6 Noise
1. Short the inputs.
2. Output should be better than -86dBu.
7.1.7 Input Loads
1. Turn loads off.
2. Set input signal equal to 1kHz at +20dBu, NORMAL MODE.
3. Turn on one load at a time.
4. The generator output should drop 6dB for either load on.
7.1.8 SPR Test
1. Place oscilloscope x-y inputs on R116 and R216 (ends nearest the power sup
ply)
2. Set the generator for 27Hz.
3. Observe a straight line (in phase).
4. Turn on the left SPR.
5. Observe a circle (90 deg. phase).
6. Set the generator for 170Hz.
7. Observe a circle (90 deg. phase).
8. Turn on the right SPR.
9. Observe a straight line (in phase).
7.1.9 RF Input Filter
1. Feed in an unbalanced linear sweep out to 500KHz to pin 2.
2. Observe output at pin 1 of U 101 (201) on the oscilloscope.
3. The envelope should look like Example 1.
4. Repeat 1,2, and 3 for input to pin 3.
7.2 CONTROL BOARDS
Perform all tests for both channels.
7 - 2 Test and Nulling Procedure
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