d. Set the output frequency of the SG 502 to 14 kHz.
g. Press the 400 Hz HI PASS pushbutton.
e. Set the INPUT LEVEL RANGE to the AUTO RANGE
h. Note the AA 501 display reading.
position.
I.
Turn off the
SG
505 output.
f. Press the FUNCTION LEVEL, VOLTS, AUTO
RANGE and RESPONSE RMS pushbuttons. All other
pushbuttons out.
j.
Adjust the SG 502 output frequency to 7.2 kHz with
an output amplitude of exactly
10%of the reading noted in
step h.
g.
Set the output amplitude of the SG 502 to any
voltage above 177
mV. Note the output amplitude as read
on the AA 501 display.
k. Turn on the SG 505 output.
h. Turn the SG 505 output on. I. Press the IMD pushbutton and
releasethe400 Hz HI
PASS pushbutton.
i.
Set the output frequency of the SG 505 to 15 kHz
and the output amplitude so the AA 501 display reads m. CHECK-that the display reading is 9.00% to
1.414 times the amplitude noted in step g.
11.00%.
j.
Press the IMD pushbutton. n. Leave this setup for the next step.
11. Check IM Distortion Accuracy, CClF Difference
k. CHECK-that the display reads <0.0025%.
Tone Test (Option 01 only)
NOTE
I. Leave these connections for the next step.
10. Check IM Distortion Accuracy, SMPTE Test
(Option 01 only)
a. Connect the test equipment as shown in Fig. 4-6.
b. Set the Option 01 SG 505 for a 60 Hz IM test signal.
Float the output.
CClF distortion is referenced to the level of either
component of two equal amplitude test tones. The
following procedure simplifies test instrumentation
requirements and minimizes sources of potential
error by omitting one of the two test tones. Because
only one test tone is present the averagingresponse
of the internal automatic set-level circuitry will cause
readings to be high by a factor of exactly
1.273
(4i7r).
If desired, the alternate procedure given in
step
11A
may be followed. This procedure provides
two equal amplitude test tones. However, it requires
an additional
SG
505
or equivalent oscillator and
extra cabling.
c. Adjust the SG 502 output level for maximum
attenuation.
a. Connect the test equipment as shown in Fig.
4-6.
d. Set the INPUT LEVEL RANGE switch to the AUTO
RANGE position.
b. Set the INPUT LEVEL RANGE switch to the AUTO
RANGE position.
e. Press the VOLTS, FUNCTION LEVEL, AUTO
RANGE, and RESPONSE pushbuttons. All other
pushbut-
c. Make certain the VOLTS, LEVEL, AUTO RANGE,
tons out.
and RESPONSE pushbuttons are in. All other
pushbut-
tons out.
f. Adjust the SG 505 for an output frequency of
7
kHz
and a 60
mV or greater composite test signal level as read
d. Turn off the SG 505 output. Makecertain the
IM test
on the AA 501
d~splay.
signal is off. Float the output.
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