Shure U4D Service Manual page 34

Tone Key Filter Alignment
Reinstall the antennas for the Tone Key Filter Alignment procedure.
DC VOLTMETER
J302
For the following test, make sure the tone key switch (S201) is ON.
Service Procedures
Shure U4D Dual Diversity UHF Receiver
ANTENNA A IN
S201
(ON)
VC102
PIN 8
U208
P202
P203
Figure 17. Tone Key Filter Alignment Connections
1. Turn the tone key switch (S201) to the ON position.
2. Turn the rf signal generator output OFF.
3. Be sure to reinstall the antennas.
4. Program a UHF transmitter (U1 or U2) to the same Group and
Channel as the receiver.
5. Place the transmitter within 1.75 – 3.25 m (5 – 10 ft.) of the
receiver.
6. Adjust VC102 for the maximum dc voltage at U208, pin 8.
Receiver 1 Alignment is now completed.
33
S201
(ON)
P202
P203
ANTENNA B IN
P202
P202
25D1062 (AG)