Park Air Systems Limited BT6M User Manual

PERFORMANCE TESTING

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0

Page 6-3

3. Apply an audio signal tone of 1 KHz at 35mV peak to pin 3 of the mobile’s

mic connector (ground on pin 5) and key up the transmitter.  Check the
following:

IV. Current draw is <6.2A

V. Transmit power is >7W and <10 W average

VI. Carrier modulated to >85%

4. Increase the 1KHz tone level by 20dB.  Check that:

VII. Carrier is now modulated to <95%

1. Take the mobile out of test mode and apply an RF signal to the mobile

on an appropriate frequency, modulate it with a 1 KHz tone to 30%
and set the Mobile’s squelch threshold to 2.  Adjust the RF level so
that the squelch is muted.

2. Increase the RF level until the squelch just unmutes and check that

the SINAD figure is >12dB.

3. Increase the mobile’s volume to produce an audio output level of 4W.

Check that the distortion figure is <5% for 30% modulation and is
<10% for 90% modulation.

4. Check that the current drawn is 2A

To adjust the TX Power, please refer to Section 5.9.