RTS KP95 Wartungshandbuch PDF herunterladen (Seite 17)

8. Adjust RV204 (internal) for a minimum common

mode signal.

9. Insert a +8dBu (1 KHz) signal into the EXT LINE IN

connector and record the output reading.

10. Remove the signal from the EXT LINE IN connector,

and insert it into the audio input + and - pins of the

FRAME connector, P10.

11. Remove the shorting plug from jumper block J201.

The output reading should be the same as in step 9.

Speaker Muting Setup

1. Short pins 2 and 3 of jumper block J202.

2. Insert a +8dBu signal (1 KHz) into the audio input

pins of the FRAME connector, P10.

3. Alternately activate and deactivate a front panel Talk

key while adjusting the SPKR MUTE trimmer

(RV203) to provide 15dB muting at the + AMP OUT

and - AMP OUT terminals during Talk switch

activation.

4. Short pins 1 and 2 of J202. Insert a +8dBu signal (1

KHz) into the audio input of the FRAME connector.

5. Activate a front panel Talk key, and check that the

amplifier output is fully muted. Restore the J202

shorting plug to pins 2-3.

6. Remove the 8-ohm load from the amplifier output,

and reconnect the speaker.

Headphone Level Adjust

1. Terminate the headphone output of the HEADSET

connector (pins 5 and 9) with an 8-ohm, 10-watt

resistive load. Connect an audio analyzer across the

load.

2. Set the front panel HDST switch to on.

3. Insert a +8dBu signal (1 KHz) into the audio input of

the FRAME connector.

4. Adjust the HDST trimmer (RV208) for 2VRMS (500

milliwatts) at the headphone output.

5. Set the front panel HDST switch to off.

6. Adjust the HDST MUTE trimmer (RV206) for 6dB

muting below the 2V AC reference level.

Sidetone Level Adjust

1. Install a shorting plug across pins 1-2 of J203.

2. Insert a -70dBm signal (1KHz at 150 ohms) into the

dynamic mic input of the HEADSET connector .

3. Turn on the HDST switch, and monitor the signal

level across the 8-ohm load at the headphone output

of the HEADSET connector.

4. Adjust the SIDETONE trimmer (RV209) to 35 dB

below a 2V AC reference level. (The level may be

varied according to user preference.)

5. Remove the test equipment.

Installation Instructions, KP95-0 Keypanel 17

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