CALAMP WIRELESS NETWORKS INC. BDD4T83-2 사용자 설명서

1.  Power up the PA and adjust front panel power control so that the output power is at the alarm

level required, usually 20% lower than nominal value (e.g. 40W if the PA normally operates at
50W).

2.  Adjust the forward power alarm set (T889 or T839: RV101and T859: RV48) so that the forward

power alarm LED lights.

3.  Adjust front panel power control for the normal operating power level

1.  Power up the PA and adjust the front panel power control for the normal operating power level.

2.  Connect an unterminated 3dB 150 W pad to the PA output (e.g. 3:1 VSWR) and adjust the

reverse power alarm set (T889 or T839: RV105 and T859: RV52) so that the reverse power
alarm LED lights.

1.  For sets with serial numbers following 217262, set RV69 (driver power level) fully clockwise.

2.  For all units, preset the tuning controls as shown in Figure 25

3.  Set RV63 (front panel power control) fully clockwise.
4.  Key on the exciter (press PTT button).
5.  Adjust CV1 for maximum output.
6.  Adjust CV8 for maximum output.
7.  Adjust CV32 for maximum output.
8.  Adjust CV51 and CV57 for maximum output.
9.  Adjust CV34 and CV35 for maximum output.
10.  Recheck all settings. The power output should exceed 110W.
11.  For sets with serial numbers following 217262, adjust RV69 (driver power level) until

the output power drops to 110W.

12.  For all units, adjust RV63 (front panel power control) to reduce the power output to the required

level (normally 100W).

1.  Insert a Shunt current device (HP 34330A Shunt 30A ) between the power supply red wire and

its 13.8Vdc output, then connect the shunt to the multimeter (VDC scale)

2.  While transmitting, monitor the current. It should remain under 22A.