Antex Electronics SX-5e - Manual (Page 55)

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APPENDIX
Connectors for Male Headers
For connecting to the auxiliary connectors on the Antex Card,
there are 2 types of connectors to use. One type is the individual
crimp type, such as the Molex C-Grid series. For single row
headers, the part number would be 50-57-900X, where X is the
number of contacts. For dual row headers, the part number would
be 22-55-2XX1, where XX is the number of contacts. The crimp
contacts are ordered separately, 16-02-0103. These parts are
available from Digi-Key, www.digikey.com.
These connectors are high profile and may interfere with the card
in the adjacent slot. Another alternative for the dual row headers
is to use insulation displacement ribbon cable connectors. (This is
the type of cable that connects to your hard drive.) These are
lower profile, but the ribbon cable wires are fairly delicate. The
ribbon cable was designed for insulation displacement termination
only, not for stripping and soldering. This will work, however, if
the ribbon cable is immobilized so that the solder joints will not be
flexed. Ribbon cables are also available from Digi-Key.
Terms
Decibels
A decibel or “dB” is a relative logarithmic measurement. It is de-
fined as:
dB = 20 x log (Voltage/Reference Voltage)
The reference voltage is referred to as the “zero dB point”. A sig-
nal 10 times greater in voltage is 20 dB higher. A signal 2 times
greater is 6 dB higher. dBu measurements use .775 volts RMS
as the reference. This is similar to dBm, which is based upon 1