4
ISOMET
3.
INSTALLATION AND ADJUSTMENT
3.1
For continuous of high duty cycle operation connect cooling water at a flow rate not less than
0.25 litres/minute at less than 25 deg.C
(Water connections are provided to suit 8mm OD plastic tubing.)
3.2
With no d-c power applied, connect the + 24V DC in to the center terminals of the feed-thru
DC inputs. DO NOT APPLY POWER. The DC supply should be capable of 40A
3.3
Connect the (4) RF output TNC jacks to the (4) RF inputs of the acousto-optic deflector (or a
50
Ω
RF high power load). The order of connection is important to the RFA1160/4 and
RFA1160/4-PO. The deflector will not be damaged if the order is incorrect but the amplifier
outputs must be terminated. If the RF cable connections are incorrect, the deflection
efficiency will vary considerably as the input frequency is changed.
The cable lengths from the amplifier to the RF connections of the deflector must be equal.
Figure 4 illustrates the connection order depending in the orientation of the input laser beam
with respect to the AO deflector.
[Connection order is not important for the RF1160/4-ZP]
3.4
Connect the Interlock of the acousto-optic deflector (7-way circular or 3-pin mini-snap
connector) to the enable inputs on the 7-way connector J9 of the RFA1160/4.
•
Connect J9/pin 5 to pin 5 of the 7-way (or to pin 1 of the snap connector)
•
Connect J9/pin 6 to pin 6 of the 7-way (or to pin 2 of the snap connector)
The interlock connection becomes open circuit disabling the RF output, if the temperature of
the modulator exceeds 40ºC or the internal driver temperature exceeds 43ºC. An LED
indicator illuminates when the Interlocks are closed and the RF is enabled.
DO NOT connect either interlock signal wire to chassis ground or 0V
.
