Shure UHF MD Manuel de service télécharger pdf (Page 15)

Shure U2 Hand-Held UHF Transmitter

Service Procedures 25B1022 (AG)14

Test Set-Up

1. Use a UA802 0.61 m (2 ft) coaxial cable or an RG58 low-loss

50 Ω cable for all cable connections.

2. Include the insertion loss of the cables and connectors in rf

conductive power measurements.

3. Audio gain potentiometer R208 does not need to be preset;

however, on JB models, GAIN should be set to maximum.

4. All rf measurements should be made through 50Ω SMC

connector J103.

5. Proper adapters should be used to connect the test equipment.

6. Apply 3.0 Vdc from a dc power supply to the respective U2

battery terminals.

7. Turn on the U2 by switching S101 to the ON position.

Output Power Confirmation

1. Using the spectrum analyzer, verify output power is at least

+8 dBm. JB models must have at least +8 dBm, but cannot

exceed +10 dBm.

2. Rf output power is not adjustable.

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Shure UHF MD Manuel de service Page 15