DPA Type HMA5000 Посібник користувача - Сторінка 3

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The Power Supplies

The HMA5000 supplies 130 V DC to the built-in preamplifiers of the

High-Voltage Microphones Types 4003, 4004, 4012, 4016, 4041-S,

and 4041-T via pin 2 on the modified 7-pin input connector on the

HMA5000, giving the microphones an extended SPL handling capability

compared to P48 powered microphones. Furthermore, the

HMA5000 has 190 V DC on pin 5 for polarisation voltage and 6.3 V

DC on pin 6 for tube heating (re pin 3). See Fig. 2.

Fig. 2. External view of the modified 7-pin input connector of the

HMA5000.

Modified 7-pin XLR pinouts:

Pin 1: Ground

Pin 2: +130 V Microphone Preamplifier Voltage

Pin 3: Heater return (65 V DC potential)

Pin 4: Microphone input

Pin 5: +190 V Microphone cartridge polarisation

Pin 6: +6.3 V Heater Voltage (Re pin 3)

Pin 7: Blinded

All voltages measured with reference to

ground unless otherwise stated

Mains Supply

The HMA5000 can be operated from either 120 V/60 Hz or 230

V/50 Hz external powering, and automatically switches to the appro-

priate power setting when connected. The AC mains supply for the

HMA5000 is connected via the 3-pin IEC 320 connector, which

accepts the mains cable supplied. Maximum power consumption is

15 W. Please take care that the HMA5000 is properly grounded. The

mains fuse needs only to be checked if the power indicator on the

front of the HMA5000 fails to light. See the chapter 'Changing the

Mains Fuse in HMA5000'.

Optional accessories - Cables

Special high-voltage microphone cables can be obtained as an optional

accessory for the HMA5000 (see Accessories Available)

The DPA microphone cables consist of oxygen free copper strands in

both conductors and shield. The tightly woven shield has 98% cover-

age and therefore has an extremely efficient noise rejection. Custom

lengths of high-voltage microphone cable up to 20 m (66 ft) can be

ordered. Please contact your local DPA Microphones representative

if you require custom cable lengths.

Optional accessories - HTP4000 Phantom Converter

The HTP4000 High-Voltage to Phantom Converter connects to the

input socket of the HMA5000 and converts the high-voltage micro-

phone input channel to a P48 microphone input channel of extremely

high quality. The HTP4000 uses a standard 3-pin female XLR-connec-

tor on the audio input, and a modified 7-pin male XLR-connector

where it connects to the HMA5000. Using standard DPA micro-

phones 4006, 4007, 4011, 4015 or 4041-SP with the HMA5000 and

the HTP4000, the absolute phase is preserved with the output

switch in position 0°.