Shure UC1L Service Manual page 17

Deviation Adjustment Voltage: Using a UC4 or U4S Receiver
J301
UC1, SIDE 2
25A1043 (RI)
AUDIO ANALYZER
UC1, SIDE 1
UC1 Transmitter
Power: +9 Vdc
Gain: Minimum
Figure 8. Deviation Adjustment Voltage Test Set-Up,
Steps 1 through 4, Using a UC4 or U4S Receiver
1. Disconnect the rf signal generator from the UC4 receiver.
Make sure the tone key switch (S501) is in the ON position.
2. Use the BNC to TINI QG cable to connect the audio analyzer
output to the MIC input of the transmitter (J301).
3. Set the audio analyzer to 1 kHz.
4. Turn the UC1 power back ON.
5. Adjust the UC1 audio input level using the audio analyzer output
to get the following readings at TP3,
UA
–6.8 dBu
6. See Figure 9 for equipment set-up and equipment settings for
steps 7 through 8.
17
Shure UC1 Body-Pack UHF Transmitter
R149
Audio Analyzer
Measurement: AC level
Output: 1 kHz
Filters:
Low-Pass (30 kHz): ON
High-Pass (400 Hz): ON
0.02 dB:
Model:
MB, MC JA, JB
– 16.3 dBu – 23.47 dBu
TP3
KK
– 15.3 dBu
Service Procedures