Dynacord DSA 8204, DSA 8209, DSA 8206, DSA 8212 Groundlift, High Pass Filter HPF, Power on delay

DIGITAL SYSTEM AMPLIFIER

CAUTION:

Blocking/closing the power amp’s ventilation louvers is not permissible. Without sufficient cooling/ventilation, the power amplifier may automatically enter protect mode. Keep ventilati- on louvers free from dust to ensure unhindered airflow.

Do not use the power amplifier near heat sources, like heater blowers, stoves or any other heat radiating devices.

To ensure trouble-free operation, make certain that the maximum allowable ambient tempera- ture of +40°C is not exceeded.

For fixed amplifier installations in a device control room that incorporate a central air-cooling system or air conditioners, calculating the maximum heat emission may be necessary. Please also take notice of the information on page 31.

2.6 Groundlift

The ground lift switch allows eliminating noise loops. When operating the power amplifier together with other equipment in a rack case, setting the switch to the GROUNDED position is recommended. Set the switch to UNGROUNDED, when the power amplifier is operated together with appliances with differing ground potentials.

2.7 High Pass Filter (HPF)

The Hi-Pass filter (50 Hz, 18 dB/oct) allows effective attenuation of low frequency audio signals, which could cause saturation problems with connected output transformers. Set the switch to the 50Hz position for activating the High Pass Filter. Set the switch to the OFF position if no attenuation of low frequency audio signals is required.

2.8 Power on delay

The ON DELAY switch at the amplifier rear panel allows selecting the power on delay time. Following table shows possible switch settings and corresponding delay times.

ON DELAY	Delay time
	(in s)
0	0.52
1	0.59
2	0.63
3	0.69
4	0.75
5	0.84
6	0.90
7	0.95

ON DELAY	Delay time
	(in s)
8	1.05
9	1.15
A	1.25
B	1.40
C	1.49
D	1.55
E	1.61
F	1.69

Owner‘s Manual 9