User's Manual Part 3

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The module contains the following blocks:
1. Input and output buffers  de-couple the internal circuitry from the I/O conenctors and detect the
presence of the reference signal.
2. Direction switch  allows the configuration of the BNC as either input or output for the 5/10MHz
reference signal.
3. 5MHz O.C.X.O. 5MHz internal reference system (optional), which frequency can be fine-adjusted
via software.
4. Controller  all of the described operations are managed by a microcontroller communicating to the user
interface board (see MTG0079) by RS485 protocol; the local controller stores the status of the module
and a reprogramming of the firmware (possible via RS485 from the display board) does not after its
contents.
EXTERNAL PIN OUT CONNECTORS
Telemeasures (DB9) RS485 (DB9)
CALIBRATION PROCEDURE
- List of instrument
PIN N° SIGNAL TYPE IN / OUT FUNCTION
1Analog Output FWD Power
2Analog Output REF Power
3 Analog Output Temperature
4 Analog Input FWD Power
5GND - -
6 Digital Output Free contact with pin7 - Alarm
7 Digital Output Free contact with pin6 - Alarm
8 Digital Input GND= Off - OPEN= On
9 Digital Input N.U.
PIN N° FUNCTION
1N.C.
2RX-
3RX+
4+5V
5GND
6+5V
7TX-
8TX+
9N.C.
MEASURE INSTRUMENT
Frequency referement control
- Spectrum analyser