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 Superseded Technical Information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 Appendices
7.4.4 Receive
Measured in accordance with TIA/EIA-603 standards.
Parameter Specification
Sensitivity: Better than -117dBm for 12dB (25 kHz spacing),
De-emphasis. Typical -120dBm
Selectivity 30-50MHz: More than 90 dB for 25 kHz adj channel,
More than 80 dB for 12.5 kHz adj channel.
Selectivity 66-520MHz: More than 80 dB for 25 kHz adj channel,
more than 75 dB for 12.5 kHz adj channel,.
Selectivity 805-960MHz: More than 70 dB for 25 kHz adj channel
more than 65 dB for 12.5 kHz adj channel.
Spurious Resp: Better than 90dB.
Intermodulation: Better than 80dB.@ 100kHz/200kHz offset
Blocking: Better than 100dB at +/- 1MHz point.
Distortion: Less than 2% at 60% deviation.
S/N Ratio: Better than 50dB wide band.
Better than 44dB narrow band.
Receiver Front End BW: Equal to band allocation, no retuning.
Discriminator Audio Bandwidth: DC to 3400Hz (-3dB)
Audio Bandwidth VF output:
300Hz to 3000Hz, +1/-3dB
Squelch Opening Time: Less than 20mS @ 20dB SINAD.
Squelch Closing Time: Less than 100mS.
Conducted Spurious: Less than -57dBm, typ -90dBm.
Table 7-9 Receive Specification
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
92