Shure UC2 Hand-Held UHF Transmitter
Alignment1725C1044 (TK)
Adjustment Voltage
1. Remove the RF test cable from TPRF1 and GND, and replace
C347. For Japan models PCB version “N” and earlier remove
cable from J2.
2. Reassemble the printed circuit boards. Use a PT1840 test head
and brass ring (PT1838-Y) to connect the audio analyzer to the
UC2 audio input (J205). Turn ON the Low-Pass (30 kHz) and
High-Pass (400 Hz) filters on the audio analyzer.
For bench testing, the audio analyzer can be directly connected
to the contact board gold contacts with clip leads.
3. Disconnect the rf signal generator from the UC4 receiver and
return the UC4 tone key switch to the ON position.
4. Adjust the audio analyzer output level (typically = –2.2 dBu) to
measure the following at TPA4 (U201, pin 7) :
UA, UB MB, MC,
MD
JA JB KK
–6.8 dBu ± 0.2 dB
(354 mV ± 1 mV)
– 16.3
dBu
(118 mV ±
1 mV)
–26.5dBu
(36.7mV
±
1 mV)
– 23.47
dBu
(52 mV ± 1
mV)
– 15.3 dBu
(133 mV ± 1 mV)
See Figure 10 for equipment set-up and equipment settings
for the rest of this test.
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 Group switch: See Table 2 Filters:
