User's Manual
Table Of Contents
- 1. General Description
- 2. Installation and Operation
- 3. Options
- 3.1 T01 Programmable Channel Spacing
- 3.2 T02 Programmable CTCSS encoder/decoder
- 3.3 T03 Programmable DCS/CTCSS encoder/decoder
- 3.4 T05 Balanced and Isolated VF plus E&M
- 3.5 T06 Simplex Changeover Relay
- 3.6 T08 VF Delay
- 3.7 T09 300Hz Upgrade HPF Filter
- 3.8 T10 Power Save Mode
- 3.9 T11 Combined Options
- 3.10 T12 External Reference Oscillator Input
- 3.11 T13 Local Speaker, Mic Socket and Front Panel Mute
- 3.12 T14 Local Channel Change
- 3.13 T16 1PPM Frequency Stability
- 3.14 U69 Extended Temperature Range Verification
- 3.15 T19/26 Line Interface Board.
- 3.16 T29 Balanced and Isolated VF plus E&M
- 3.17 T31 Network Adapter
- 3.18 T34 Ethernet option
- 3.19 T36 Option - TX Ref Oscillator input and Modulator
- 6. MX800 Base Station Fault Finding Procedure
- 7. Appendices
- 7.1 MX800 Interface Connections
- 7.2 CN2 DB9 Female Monitor Connector
- 7.3 CN3 DB25 Female Digital I/O Connector
- 7.4 MX800 Specifications
- 7.5 Channel Select DIP Switch Settings
- 7.6 MX800 Model Number Configuration Guide
- 7.7 MX800 System Applications
- 7.7.1 Conventional base station/repeater
- 7.7.2 Link transceiver
- 7.7.3 Data transceiver
- 7.7.4 Paging transmitter
- 7.7.5 Trunking Base Station
- 7.7.6 Systems base
- 7.7.7 Repeater with Morse ID
- 7.7.8 Simplex base station
- 7.7.9 Duplicated base station
- 7.7.10 Power Save base station
- 7.7.11 Tone key base station
- 7.7.12 Voting base station
- 7.7.13 Simulcast base station
- 8. Superseded Technical Information
- 9. Drawings
MX800 Transceiver Installation & Operation
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
12
2.2 Screw Head Types
Modern screws employ a wide variety of drive designs, each requiring a
different kind of tools to drive in or extract them. Spectra Engineering has
chosen the Pozidriv ® screw head and screwdriver as it preferred screw type
on all of its products, sizes 1 & 2. This is because the Pozidriv system is the
choice for high volume assembly operations. It provides self-centring system
and excellent driving control with less operator fatigue.
It is similar to the classic Phillips cross-head. The differences lie in the way
that the heads are machined. The Phillips head has 4 simple slots cut out of it,
whereas in the case of the Pozidriv each slot is the result of two machining
processes at right angles. The result of this is that the arms of the cross are
parallel sided in the case of Pozidriv, and tapered in the case of Phillips. The
Pozidriv has four additional points of contact, and does not have the rounded
corners that the Phillips screw drive has.
Phillips screwdrivers will usually work in Pozidriv screws, but Phillips
screwdrivers are likely to slip or tear out the screw head when used in
Pozidriv screws. It is important that you use the correct type and size
screwdriver to avoid damaging the screw head.
Exrta contact points
Figure 1-1 Top view of screw heads
Pozidriv
Philliips
Parallel sides
Tapered sides
Figure 1-2 Side View of screw Heads
Exrta contact ridges
Parrallel driving flute
Tapered driving flute
Figure 1-3 Screw driver Tip View
Used on All
Spectra products
Don’t used this type
on Spectra products
Pozidriv
Phillips