Shure U4D, Service Manual

Page: 34 / 47

Shure U4D Dual Diversity UHF Receiver
33 25D1062 (AG)
Service Procedures
Tone Key Filter Alignment
Reinstall the antennas for the Tone Key Filter Alignment procedure.
VC102
P202
P202
P203
S201
ANTENNA A IN
P202 P202
P203
S201
ANTENNA B IN
U208
DC VOLTMETER
PIN 8
J302
(ON)
(ON)
Figure 17. Tone Key Filter Alignment Connections
For the following test, make sure the tone key switch (S201) is ON.
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.