MX800 Transceiver Technical Manual
© SPECTRA ENGINEERING 2006 Revision 4.2.3
46
4. Change the channel on the local channel switches and check that the
channel selected on the BCD switch is in fact the channel that the
Diagnostics screen indicates.
5. Reset the MX800 operating channel to the required position.
3.15 T16 1PPM Frequency Stability
12.5kHz channels Frequency band K to X (320-950MHz)
25.0kHz channels Frequency band R to X (805-950MHz)
This option provides for 1PPM frequency stability for narrowband MX800s
in the K to X bands. This frequency stability is specified from –30° C to
+60° C.. 1PPM stability can additionally be used on any frequency band
above 66 MHz but the DC-FM transmitter modulation feature is not fully
specified below 400 MHz. Typically, this results in only some minor drop of
the low freq response or ability to set up the Transmitter modulation balance.
Also see section 3.12 and section 7.5.13
3.16 U69 Extended Temperature Range
Verification
The MX800 is optionally available in an extended operating temperature
range version, extending the temperature range over –30° C to –10° C.
Additional testing and operational verification is done in an environmental
chamber at –30C for 24 Hours. An additional factory test report sheet is
provided at his temperature. Frequency stability is specified at 2.5PPM for
this option.
To Next Page
Loading...
