Shure UC2, Руководство по обслуживанию

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Shure UC2 Hand-Held UHF Transmitter
18 Service Procedures 25A1044 (RI)
Deviation Adjustment Voltage: Using a UC4 or U4S Receiver
AUDIO ANALYZER
S501
(TONE KEY SWITCH)
TPA4 –
U201,
pin 7
AUDIO
SIDE 1
UC4 Receiver UC2 Transmitter Audio Analyzer
Output: Unbalanced Power: + 9 Vdc Measurement: AC level
Gain: Maximum Gain: Minimum Frequency Output: 1 kHz
Squelch: Mid Filters:
Tone Key (S501): ON Low-Pass (30 kHz): ON
High-Pass (400 Hz): ON
Figure 10. Deviation Adjustment Voltage Test Set-Up,
Using a UC4 or U4S Receiver, Steps 1 through 3
Reassemble the printed circuit boards for this test.
1. Disconnect the rf signal generator from the UC4 receiver and
return the UC4 tone key switch to the ON position.
2. Connect the audio analyzer output to the MIC input of the
transmitter, using the test head or clip leads to the gold spring
contacts.
3. Adjust the audio input level using the audio analyzer output to
measure the following at TPA4 (U201, pin 7) :
UA MB, MC JA, JB KK
–6.8 dBu
±
0.2 dB
(354 mV
±
1 mV)
– 16.3 dBu
(118 mV
±
1 mV)
– 23.47 dBu
(52 mV
±
1 mV)
– 15.3 dBu
(133 mV
±
1 mV)
See Figure 11 for equipment set-up and equipment settings for
steps 4 through 6.