Megaimpulse Ltd. NPG-15/2000 Manuel d'utilisateur télécharger pdf (Page 12)

generator, i.e. internal generator frequency sets the upper limit for external

triggering pulses frequency.

Please rotate FREQUENCY regulation knob to the most clockwise position to

allow the maximum external triggering pulses frequency.

The minimum repetition rate is 50 Hz. The lower frequency results in decreasing

of output pulses amplitude.

Burst mode

Burst operation mode can be simply organized by using external pulse generator.

Set EXT/INT toggle switch in EXT position and apply external ENABLE pulse to

optical SYNC IN connector. Output pulse repetition rate is set by FREQUENCY

regulation knob at the front panel of the generator and burst length is determined

by duration of ENABLE pulse.

RECOMENDED OPTICAL TRANSMITTERS FOR

EXTERNAL TRIGGERING AND OUTPUT PULSE MONITORING

NPG-15/2000(N) is equipped by optical connector for external triggering and

output pulse monitoring. AVAGO HFBR-1522Z and HFBR-2522Z transmitters as

well as AVAGO HFBR-4501, HFBR-4511 connectors and HFBR-RUS optical

cable are used for optical signals transmitting.

The recommended external triggering pulse width is 1µs. Maximum frequency is

3.2 kHz and may be limited additionally by FREQUENCY regulation knob. The

optical triggering pulse should be applied to SINC IN connector.

SYNC OUT signal may be used for synchronization and pulse monitoring. This

signal precedes the output high voltage pulse for about 0.5 µs and has 2 µs width.

To use the optical connectors please remove the rubber protective caps by thin

tweezers or other suitable tool, stick gently optical cable with HFBR-4501/HFBR-

4511 connector into the hole up to click.

Replace the rubber caps back to the holes while you are not using optics to prevent

transmitter lens from the dust.

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Megaimpulse Ltd. NPG-15/2000 Manuel d'utilisateur Page 12