ORTEC 420 - Installation Guide; General Installation Notes; Power Connection for ORTEC Bin; Linear Amplifier Connectivity

3-1
3. INSTALLATION INSTRUCTIONS
3.1 General
Model 420, used in conjunction with Model 401/402 Bin and Power Supply, is
intended for rock mounting, and therefore it is necessary to ensure that vacuum
tube equipment operating in the some rock has sufficient cooling air circulating
to prevent any localized heating of the all-transistor circuitry used throughout the
Model 420. The temperature of equipment mounted in racks can easily exceed
the recommended maximum unless precautions are taken; Model 420 should not
be subjected to temperatures in excess of 120''F (50° C).
^ 3.2 Connecton to Power—Nuclear Standard.Bin, ORTEC Model 401/402
Model 420 contains no internal power supply, and therefore must obtain power
f from a Nuclear Standard Bin and Power Supply such as ORTEC Model 401/402.
I It is recommended that the Bin power supply be turned off when inserting or
' removing modules. The ORTEC 400 Series is designed so that it is not possible
to overload the Bin power supply with a full complement of modules in the Bin;
however, this may not be true when the Bin contains modules other than those of
ORTEC design. In this case, power supply voltages should be checked after the
' insertion of modules. Model 401 /402 has test points on the power supply control
panel to monitor the dc voltages.
3.3 Connection to a Linear Amplifier
The input to the Model 420 is via a front panel BNC connector and is compatible
with all linear amplifiers capable of producing 10-volt unipolar or bipolar output
signals onto a 2000-ohm load, with the positive excursion of a bipolar signal
leading the negative excursion in real time. The input operating range is from
threshold, typically 100 millivolts, to 10 volts, This unit may be used with vacuum
tube amplifiers which are capable of output signals of 100 volts, if the output
signal from the amplifier is attentuated so that it cannot exceed 10 volts. Simple
resistive attenuators installed in the vacuum tube amplifiers will make them com
patible with related transistor equipment.