Tektronix TSG 90 PATHFINDER, Руководство по обслуживанию

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Performance Verification and Adjustment Procedures
TSG 90 PATHFINDER Service Manual
3–8
b. CHECK — that the Audio Output is 0 dBu
±
0.25 dBu.
c. Set the PATHFINDER Audio Level to + 4 dBu (use the
A
and
"
keys).
d. CHECK — that the Audio Output is + 4 dBu
±
0.25 dBu.
e. Set the PATHFINDER Audio Level to + 8 dBu:
f. Go back up to the TONE FREQ menu item (press the
Y
key) and select
the appropriate frequencies in turn to CHECK — that the Audio Output
is + 8 dBu
±
0.25 dBu at each of the following frequencies:
j
50 Hz
j
4 KHz
j
63 Hz
j
8 KHz
j
125 Hz
j
10 KHz
j
250 Hz
j
12.5 KHz
j
400 Hz
j
16 KHz
j
1 KHz
j
20 KHz
j
2 KHz
g. Move the audio cable from the PATHFINDER Audio CH 1 output to the
Audio CH 2 output.
h. CHECK — that the Audio Output is + 8 dBu
±
0.25 dBu at each of the
following frequencies:
j
20 KHz
j
1 KHz
j
16 KHz
j
400 Hz
j
12.5 KHz
j
250 Hz
j
10 KHz
j
125 Hz
j
8 KHz
j
63 Hz
j
4 KHz
j
50 Hz
j
2 KHz
i. Set the Tone Frequency to 1 kHz and the Tone Level to +4 dBu.
j. CHECK — that the CH 2 Audio Output is + 4 dBu
±
0.25 dBu.
k. Set the PATHFINDER Audio Level to 0 dBu.
l. CHECK — that the Audio Output is 0 dBu
±
0.25 dBu.