User guide

Pinouts B-5
B
External Clock Connector Pin Assignments
A DE-9 connector is provided on the DL3800 rear panel for connection to
an External Clock. Pin Assignments for the External Clock connector are as
follows:
Per RS-422 requirements, the receiver has an input sensitivity of 200 mV
over the input voltage range of ±7 V. The frequency is 1.544 MHz ±
50Êppm, and the impedance is 10 kW.
57
18
923
421
Table B-7 External Clock Pinouts
PIN SIGNAL
1 Signal A
2 Signal B
5 Shield
3,4,6,7,8,9 No Connection
Table B-6 DB-25 to DE-9 Pinouts
DB9 DB25