Tri-M Systems HE104 technical manual 2 +5VDC Low Q/ Noise Q=quiescent

23 June 2005

HE104MAN-V8 Manual

2.6.2 +5VDC Low Q/ Noise (Q=quiescent)

This jumper allows the +5VDC regulator IC1 to be changed from the low ripple noise mode into the low quiescent power mode. This option is most likely to be used when absolute minimum power consumption must be maintained such as, when operating off a limited battery source. It is recommended that the +12vDC Low Noise mode be selected whenever the +5VDC Low Q. mode is not required.

The PCB jumper trace is located on the bottom of the circuit board between two pads. Location of the jumper is identified on the left side of the heat sink by “Low Q/Noise”. Refer to figure 2.1 for exact location of +5VDC Low Q/Noise jumper.

The factory default setting for Low Q/Noise is for low ripple noise. To change the factory default setting to Low Q operation, the small PCB jumper trace must be cut using the tip of a sharp knife. To return to Low Noise operation, solder a jumper connecting the jumper pads.

2.6.3 +12VDC Low Q/ Noise

This jumper allows the +12VDC regulator IC1 to be changed from low ripple noise mode into the low quiescent power mode. This option is most likely to be used when absolute minimum power consumption must be maintained such as, when operating off a limited battery source.

The PCB jumper trace is located on the bottom of the circuit board, between two pads of jumper block JP2. Location of the jumper is identified on the right side of the heat sink by “Low Q” with “Low Noise” directly below it. Refer to figure 2.1 for exact location of +12VDC Low Q, Low Noise jumper.

The factory default setting for Low Q, Low Noise is for low ripple noise. To change the factory default setting to Low Q operation, the small jumper connecting JP2-1 to JP2-2 must be cut using the tip of a sharp knife and solder a jumper across the pads JP2-2 to JP-3. To return to Low Noise operation, remove the jumper between JP1-2 and JP2-3 and re-install the jumper connecting JP2-1 to JP2-2.

2.6.4 Mezzanine Expansion Headers

The mezzanine expansion headers are used for installation of the optional battery charger. The mezzanine expansion headers can also be used for custom output voltages such as, Vee for LCD panels. If custom output voltages are required please contact Tri-M Engineering.

Tri-M Engineering	Tel:	800.665.5600, 604.945.9565	11
1407 Kebet Way, Unit 100	Fax:	604.945.9566
Port Coquitlam, BC V3C 6L3	E-mail:	info@tri-m.com
Canada	Web site:	www.tri-m.com